Homepage → Gardening Related Topics → Glossary of Botanical Terms

Glossary of Botanical Terms

Planted July 27, 1998
Last tended to on October 11, 2024
Reading time: 25 minutes

Glossary of Botanical Terms

A

Achene

A hard, dry, one-chambered, one-seeded indehiscent fruit. The fruit wall is not joined with the seed coat. Examples are spinach and sunflower.

Agriculture

The science, art, or occupation concerned with cultivating land, raising crops, and feeding, breeding, and raising livestock. Farming.

Angiosperm

A plant whose seeds are formed within a fruit. Angiosperms, or flowering plants, are the dominant plants in the world today. Virtually all crop plants are of this plant class.

Annual

A plant that completes its life cycle in one growing season.

Anther

The saclike structure, that is the part of the stamen (male reproductive part), in which pollen is formed in a flower.

Asexual Reproduction

The process of producing new individuals by vegetative propagation – for example, using cuttings. All offspring are clones or genetically identical to the parent plant.

Awn / Awning

In botany, an awn is either a hair-like or bristle-like appendage on a larger structure. These are common in plants in the grass family often giving them a hairy appearance. Awns can be short, several centimeters long, straight, or curved, single or multiple per floret.

B

Bean Common Mosaic Virus (BCMV)

Bean common mosaic virus (BCMV) and Bean common mosaic necrosis virus (BCMNV) are species within the genus Potyvirus, family Potyviridae and cause some of the most economically important diseases of legume crops worldwide. Both viruses occur essentially wherever bean and cowpea (including Phaseolus, Vicia, Vigna), lupin (Lupinus), pea (Pisum), peanut (Arachis), and soybean (Glycine) are grown; are transmitted by aphids in a non-persistent manner, and also seed-transmitted. Isolates of BCMV and BCMNV can be differentiated into ten pathotypes based on their reactions on differential bean cultivars.

Berry

Fruit with soft flesh surrounding one or more seeds.

Biodiversity

Biodiversity is a commonly used contraction (or portmanteau) of the two words, “biological” and “diversity.” It simply refers to the diversity, or variety, of plants and other living things in a particular area, region, or the planet as a whole ecosystem.

For many reasons, biodiversity on our planet is threatened. One of the biggest contributors to loss of cultivated plant variety loss have been the consolidation and mergers within the mainstream seed industry. For more information, refer to the ETC Group’s papers entitled:

Biennial

A plant that completes its life cycle in two years. Generally, in the first year, growth occurs followed by flowering, fruiting and seed production in the second year.

Binomial

The two-part scientific name consisting of a genus name and a species, cultivar, group, series, or hybrid epithet, denoting an individual within a genus.

Blanch

From the Old French word blanchir, to whiten. As a gardening term, it is used to describe a process of excluding light so as to make the plant material lighter in color and more tender. For example, this is commonly done with endive.

Blight

See “Late Blight.”

Bolt

An Old English word for arrow, to bolt is a verb used to describe a plant prematurely producing seed.

C

Carpel

A floral leaf bearing ovules along the margins. 

Cold Stratification

Many herbs and other perennial plants require this extra “conditioning” or “stratification” step. Cold stratification or conditioning is simply a method of letting the seeds know that it is time to wake up. There are many methods for accomplishing this.

Certified Naturally Grown (CNG)

The Certified Naturally Grown™ (CNG) label is a non-profit alternative eco-labeling program for small farms that grow using USDA Organic methods but are NOT a part of the USDA Certified Organic program.

Cultivar

A variety of plant that has been produced and maintained through cultivation. Not a wild variety. A word from the combination of the two words, “cultivated variety.”

D

Damping-off

A single, collective term used to describe underground, soil line, or crown rots of seedlings due to unknown causes. Many soil borne diseases and fungi can cause these symptoms of sudden plant death. Click here for an article with a more thorough discussion of the description, causes, and controls.

Days to Maturity

This is a plant variety descriptor that is commonly used in gardening and commercial agriculture. This number is fairly subjective, varies from location to location, and even from year to year. It is intended to be used for planning purposes, but by no means is ever assumed to be an exact date. Nature, by her very nature, is never exact.

When reading plant descriptions, the days to maturity number for plants direct sown from seeds will be an approximate number of days from the time that the seedlings emergence to first harvest.

For plants that are started indoors and then transplanted later, for example, tomatoes, peppers, and eggplants, the number of days to maturity is from the date of transplant outdoors until the first ripe fruit are harvested.

Generally, the main harvest occurs days to weeks later, depending on the plant species and what part of the plant is harvested and used.

To reiterate, these number are very approximate and to be used for rough planning purposes only!

Determinate

In the context of our web site, this word is primarily used in reference to tomato categories. Determinate refers to the growing habit of plants that are bushy, grow to a specific point, set fruit all at once, ripen over a short, two to four week period, and are done. They generally do not need staking although caging is usually recommended.

When this trait was first observed and further developed in the early 20th Century, the term used was “self-topper.” That is, the plants did not require “topping” or pruning as commercial growers were accustomed to doing with their indeterminate or vining tomatoes.

In the broader sense, the word determinate is used to describe a growth habit of any species that fits this general definition. Modern bush beans developed for mechanical harvesting, for example, are determinate in habit. A subset of determinate is a semi-determinate growth habit. In beans, this is commonly referred to a “half-runner” type beans. Plants with this growth habit are usually short, compact bushes and meet the main definition of being determinate, but along with producing a primary main crop, they will usually produce short runners and depending on the location, additional fruit.

Dwarf Tomato (Historically called “tree-type”)

Indeterminate, determinate, and dwarf are the three major categories of tomato growth habits. There is much variability within the dwarfs, but it is subtle and does not seem to be consistent from season to season, or even region to region.

In general terms, dwarf tomato plants have very thick main stems with minimal branching. They grow slowly and primarily vertically. Their foliage can be either regular or potato leaf, but in either case, are rugose (e.g. dark green in color and crinkly in texture).

Dwarf tomatoes, formerly quite obscure, are actually very old. In fact, dwarf-type tomato varieties date back to at least the 1850s when they were referred to as “tree-type” plants. For reference, determinate tomato varieties didn’t appear until about the 1920s.

In regards to dwarf tomatoes, think of the joy that indeterminate tomatoes offer - their diversity of color, sizes, and flavors - but without all of the work associated with the tall, vining plant growth habit which always presents challenges to gardeners - supporting, pruning, etc.

Dwarfs are actually like indeterminates in their diversity and potentially excellent flavors, but they do not require pruning since they grow at approximately half of the vertical rate when compared to indeterminate plants. For example, instead of growing an eight foot tall ‘Cherokee Purple’ tomato, gardeners can choose to grow ‘Rosella Purple’, that bear similar flavored fruit gradually throughout the season, just like indeterminates, but require less work and top out at about four feet in height.

“* . . . the tomato De Laye, often called Tree tomato. This originated about 1862 in a garden at Chateau de Laye, France. In this the plant rarely exceeds eighteen inches in height, is single-stemmed or with few very short branches, the nodes very short, the fruit clusters few and small. From this, by crossing with other types, there has been developed a distinct class of dwarf tomatoes which are of intermediate form and character and are well represented by ‘Dwarf Champion’*.[1]

E

Embryo

Rudimentary plant within the seed.

F

F1 or F1 Hybrid

First generation resulting from a cross mating of distinctly different parental types. F2, F3, F4, etc. are annotations for subsequent generations.

Foundation Seed

Primary source of seed of a genetically identified variety from which all increases are made.

Forcing

An old agricultural term used to describe the practice of raising produce outside of their normal, biological timing. This has historically been achieved in cellars, heated buildings, greenhouses, cold frames or under other artificial growing conditions. For obvious reasons, it is probably the most labor intensive form of production and falls in and out of favor as markets demand.

Once quite popular among regional growers, the out-of-season produce would command high prices making the expense of labor and facilities profitable. However with the adoption of international, large scale food production and the shipping industry, all-season produce availability is no longer rare or a novelty.

Fruit

A fruit is a ripened ovary of a plant along with any attached parts that developed with it from the flower.

Full Sun

[Definition available separately below under “Sunlight Requirement Definitions.”]

G

Gene

A group of base pairs in the DNA molecule that determines one or more hereditary characters.

Genetic Drift

Unintentional transfer of genetic traits between populations.

Genetic Engineering

Genetic engineering involves laboratory techniques to change the DNA of living organisms. See this great explanation at the Mother’s for Natural Law Web site.

Germ

In botanical terms, the germ is the earliest form of an organism; a seed, bud, or spore. That is, it is the reproductive part of a seed – the embryo – that grows into a plant.

Glaucous

Adjective to describe a plant or fruit that are covered in a grayish, whitish, or bluish waxy or powdery substance. From the Greek, glaukos and Latin, glaucus meaning “blue-gray, green.”

GMO

An commonly used abbreviation for Genetically Modified Organism. Refer to genetic engineering above.

Genetically modified organisms (GMO), or more correctly, Genetically Engineered Organisms (GEO), provide a class of legal ownership protection and ultimately exist to create profit for their owners. Since the 1980s and the boom of the “biotech era,” the goal of the mainstream seed industry, is to force growers to purchase new seed every year. They hope to break thousands of years of the agricultural practice of farmers saving seed. The “holy grail” of this technology, one that would absolutely force this issue, is known as Genetic Use Restriction Technology, commonly referred to as Terminator Technology. Refer to the “How the Terminator (Gene) Terminates” article.

H

Harden Off (Hardening)

The straightforward process of gradually acclimating a tender seedling, germinated and nurtured under artificial conditions, for life in the wilds of the garden. For most tender plants (tomatoes, peppers, etc.), hardening off for two weeks is desirable.

Examine your garden on a frosty morning searching for areas that are relatively free from frost. For the first week, place your plants outside during the warmest part of the day. Initially limit their exposure, bringing them back indoors and under cover, after a few hours.

During the second week, gradually extend the amount of time you leave them outside, bringing them back in during the evening. By the end of the second week, assuming that there is no longer any threat of frost, your plants should be ready for transplanting into the garden.

Heirloom Seed (aka Heritage Seed)

The definition varies from person to person, company to company. It has become a very popular or trendy marketing term within the garden seed and boutique vegetable industries.

We adhere to the purest form of the definition. That is, an heirloom plant variety is one that has been valued by a family, tenderly and carefully preserved, and handed along from generation to generation. For more information, click here.

We do concede that there are some “heirlooms” that began as a commercial introduction. That is, they were introduced by a seed company or seedsman. These old “commercial heirlooms” have value and are worthy of protection. At a minimum, an heirloom variety must be, open-pollinated, not an unstable hybrid, and absolutely never genetically engineered!

The oldest reference we have been able to find using the word “heirloom” as an adjective to describe seeds, plants and bulbs is on page 30 of the book entitled, Pioneer American Gardening, compiled by Elvnia Slosson, copyright 1951, Published by Coward-McCann, Inc., New York.

Humus

From the Latin word for earth or ground, humus is the organic matter in quality soil. The reason we work compost into our soil is to increase the humus level which improves the quality and health of the soil.

Horticulture

The science and art of the cultivation of a field crops, a garden, orchard, or nursery; the cultivation of flowers, fruits, vegetables, or ornamental plants.

Hybrid

A plant resulting from the cross mating of distinctly different parental types. From the Latin word hybrida or offspring of a domesticated sow and a wild boar.

In the past, no reputable seedsman would ever release a new variety in an unstable state. It would be bred and selected for years until it would come true-to-type from saved seed.

Starting around W.W. II, the definition of the term has changed in its implication and application. Most seed companies are now highly motivated by profit and so they intentionally release unstable, F1 hybrids whose exact parentage are guarded trade secrets. If a gardener save seeds, their resulting crops will not be true-to-type and will exhibit various traits from its parents.

I

Indehiscent

Not splitting open when ripe.

Indeterminate

Like determinate (refer to its definition above), this word is used to describe plant growth habits. For example, in reference to tomato plant varieties, indeterminate tomatoes continue to grow, set fruit, and ripen continuously until death – usually due to disease or frost conditions. They are also known as vining types, and require staking, baskets, or other support.

J

No entries

K

Keeper

A storage variety.

L

Late Blight

Late blight is caused by the same fungus (Phytophthora infestans) that caused the famous Irish potato famine of the 1840s. All strains are devastating to tomatoes and potatoes.

The following may be of help:

Leach

The roots of the word are Old English leccan, to water. The definition is to dissolve out. For example, heavy rains have leached the minerals from the soil.

Leggy

The tendency of plants to grow tall, tin and straggly. Typically caused by inadequate light.

Loam

Loam is soil-type that is rich, fertile and is whose moisture retention abilities are balanced. The roots are from the Middle English word lam which translated means clay.

M

Monoecious

Having stamens and pistils in separate flowers on the same plant.

Multigerm (Multi-germ)

Multigerm seeds (see germ) occur when flowers grow in tight clusters and become fused together by their petals. Examples of this trait are the flowers on beet and chard plants, resulting in seed balls that when planted, may produce one to five seedlings.

N

Nostalgia

Remembering history the way it should have been. The “Good Ol’ Days” syndrome.

O

Olericulture

Cultivation of vegetables for home or market.

Open-Pollinated Seed

A seed which produces offspring just like the parent plants. Open-pollinated seed allows growers to harvest and save seed for the following year.

Open Source Seed Initiative (OSSI)

As a mission-driven organization, heirloom, heritage, and public domain seeds are at the core of our values. Sadly, we live in a world where corporations and governments work to control seeds. The Open Source Seed Initiative was founded in 2012 to protect the ability to share seeds. The OSSI Pledge, as described on their website at https://osseeds.org/, is as follows:

“You have the freedom to use these OSSI-Pledged seeds in any way you choose. In return, you pledge not to restrict others’ use of these seeds or their derivatives by patents or other means, and to include this Pledge with any transfer of these seeds or their derivatives.”

Organic

The term organic as a descriptor of gardening practices dates back to the early 1940s. The term, “organic farming” was first used in a 1940 publication, “Look to the Land”, by Lord Northbourne. Then in 1942, J. I. Rodale founded “Organic Gardening and Farming” magazine and used the word “organic” to describe the “natural method of gardening and farming”.

It should be noted that prior to about World War II, what we all now call organic gardening and farming was simply the standard horticultural principles as practiced for centuries.

Organic, is now a marketing term “owned” and regulated by the Federal government. That is, if you are located in the United States and want to sell something that you grow organically, and call is organic, you follow the standards of the U.S. government.

Organic, Certified

Certified Organic refers to products grown under guidelines as mandated by the National Standards on Organic Agriculture. To become certified, growers and processors must keep very detailed records, adhere to the standards, have soil and facilities tested, keep copious records, and pay certification fees and duties (effectively taxes). Examples of organizations who perform these certifications are OCIA, Oregon Tilth, California Certified Organic Farmers, and the Northeast Organic Farming Association.

Organically Grown

Many small growers are strict and responsible gardeners but either cannot afford the fees associated with the USDA’s certification process or take issues with the standards. Some believe that the USDA, who has affectively taken legal ownership over the use of the word organic as applied to marketing, is not strict enough.

Since the work of many small growers is a labor of love, there is an exemption set in the national standard allowing a product to be labeled as “Organically Grown” if the grower meets the same requirements and does not have total gross organic sales of over $5,000 annually.

“‘Organic’ is now dead as a meaningful synonym for the highest quality food. Responsible growers need to identify not only that our food is grown to higher, more considered standards, but also that it is much fresher because it is grown right where it is sold.” ~Eliot Coleman

Much like the original grassroots efforts of the organic movement of decades ago, there are alternatives cropping up. One such alternative is the Certified Naturally Grown™ label. It is a non-profit alternative eco-labeling program for small farms that grow using USDA Organic methods but are NOT a part of the USDA Certified Organic program.

Overseed

When a seed has quality problems such as suspected low germination rates or physical damage, a farmer of gardener may choose to over seed. That is, plant denser than the normal seed spacing. This is intended to compensate for bad seeds and still result in a good stand of plants.

P

Panicle

A loose, branching cluster of flowers, as seen in millet and oats.

Partial Shade

[Definition available separately below under “Sunlight Requirement Definitions.”]

Partial Sun

[Definition available separately below under “Sunlight Requirement Definitions.”]

Parthenocarpic

In botany and horticulture, parthenocarpy (literally meaning virgin fruit) is the natural or artificially induced production of fruit without fertilization of ovules. In simple English, this means that fruit develops from a flower that was not pollinated and that the resulting fruit is therefore seedless.

An example of plants with this trait are a series of tomatoes bred at Oregon State University for colder, shorter growing seasons and can often produce ripe fruits two weeks earlier than other varieties planted in the garden. Although the first fruits on these plants will effectively be seedless, once the weather warms up, the later fruit resulting from pollinated flowers will contain seeds. Keep this in mind when seed saving!

NOTE: The parthenocarpic trait in tomatoes is naturally occurring and not the result of genetic engineering. It has been bred into the open-pollinated varieties that we offer here.

Perennial

A plant that lives from year to year and typically involves many reproductive cycles. By definition, for three seasons or more. From the Latin word perennis, “through the year”.

Perfect Flowers

This term refers to plant types whose flowers contain both male (stamen) and female (pistil) structures and whose pollen is self-compatible (See also self-incompatible).

Pistil

The seed-bearing organ of the flower, composed of stigma, style, and ovary.

Plant Regulators

Synthetic compounds that induce growth responses in plants. Also known as “growth regulators.”

Pollen

Tiny (often microscopic) bodies that are borne in the anthers of flowers and contains the male generative cells.

Q

No entries

R

Resistance

The ability of plants to suppress or retard the activities of a specified pest or pathogen. Also, the ability of plants to withstand a specific environmental or chemical stress.

Rhizome

Rhizomes are underground, horizontal stems that produce shoots and roots. From the Greek word rhiza, root.

Rugose

Wrinkled or crinkled, usually covered with wrinkles, the venation seeming impressed into the surface. All dwarf-type tomatoes have rugose leaves.

S

Scape

In common terminology, a scape is a smooth stem that comes out of the ground, has no branches or normal leaves, and that holds flowers. Garlic, onions, chives and Amaryllis are examples of plants with these structures.

A garlic scape.

Scarify (Scarification)

In plant types that have hard seed coats, germination can take months to years to naturally occur. Texas Bluebonnets are an example of this. To promote fast germination, growers scarify the seed coat.

Scarification is the manual scratching or nicking of the seed coat as a means of simulate the natural weathering process. Once scarified, most seed will germinate quickly and should be kept watered until germination occurs and plants become established.

There are three common methods used for scarification:

The key is to experiment and find out what works best for you and for the seed variety you are working with.

Seedbank

Collection of seeds for long-term storage, protecting rare varieties.

Self-Incompatibility

There are other definitions, but in the context of the mission of the Victory Seed Company, a seedbank (also called a seed bank, seed vault, gene bank, or plant bank) is the collection of seeds specially prepared for long-term storage.

The reasons for developing and maintaining a seedbank varies by individual or organization. We work to help protect as many of the useful plants that have been developed over centuries but that have now become rare or are no longer available from commercial sources.

Storing seeds helps to guard against catastrophic events like natural disasters, outbreaks of disease, war, or corporate consolidations. Unlike seed libraries or seed swaps that encourage frequent reuse and sharing of seeds, seedbanks are not typically open to the public.

Sport

A phenomenon whereby a spontaneous mutation occurs within an otherwise stable plant variety. It is caused by a genetic mutation and not as a result of cross pollination.

Stamen

The stamen (plural stamina or stamens) is the male or pollen producing reproductive organ of a flower. Stamens typically consist of a stalk called the filament, and an anther.

Stratification

Stratification is the process of pretreating seeds to simulate a natural winter cycle that a seed must endure before germinating. Many seed species undergo an embryonic dormancy phase, and generally will not sprout until this dormancy is broken. The time taken to stratify seeds depends on species and conditions.

Sucker

The unwanted shoots from the stem or roots that draw nutrients and sap the plants fruiting and flowering ability.

Sunlight Requirement Definitions

Susceptibility

The inability of plants to restrict the activities of a specified pest or pathogen. Also, the inability to withstand a specific environmental or chemical stress.

Sustainable Agriculture

“A sustainable agriculture must be economically viable, socially responsible, and ecologically sound. The economic, social, and ecological are interrelated, and all are essential to sustainability. An agriculture that uses up or degrades its natural resource base, or pollutes the natural environment, eventually will lost its ability to produce. It’s not sustainable. An agriculture that isn’t profitable, at least over time, will not allow its farmers to stay in business. It’s not sustainable. An agriculture that fails to meet the needs of society, as producers and citizens as well as consumers, will not be sustained by society. It’s not sustainable. A sustainable agriculture must be all three – ecologically sound, economically viable, and socially responsible. And the three must be in harmony.” ~Dr. John E. Ikerd, Professor Emeritus of Agricultural Economics, formerly Extension Professor, University of Missouri.

T

Tiller (in Maize/Corn)

Corn tillers, sometimes incorrectly referred to as “suckers,” are a normal part of maize plant physiology.

Except for cases where tillers appear due to damage to the main growing stalk, the appearance of tillers generally indicate that the plants are happy and growing under favorable conditions.

Since they do not “suck” nutrients from the plant, and usually produce extra bonus ears, they do not need to be removed. As a matter of fact, removing the tillers can make the plant susceptible to insect and disease attacks.

Tolerance

The ability of plants to endure a specified pest, pathogen, environmental pressure or chemical stress. A tolerant variety will sustain less damage than a susceptible variety when grown under the same conditions.

Tree-type Tomatoes

(Refer to “Dwarf”)

U

No entries

V

Variegated

Having streaks or spots of different colors; for example, variegated ivy.

Viable

Capable of growing or developing into a healthy plant.

Veteran

As an American-based organization that also happens to have been founded by someone who served, we use the following as a guide for who is to be considered a veteran.

“A veteran – whether enlisted, commissioned, active duty, honorably discharged, retired, National Guard or Reserve – is someone who at one point in their life, swore a lifelong oath, one with no expiration date, effectively writing a blank check made payable to the United States of America for an amount, up to and including, their very life!”

As a reminder, here are those oaths:

Oath of Enlistment – I, (NAME), do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice. So help me God.

Officers Oath – I, [NAME], do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter. So help me God.

When our very way of life seems to be threatened and attacked from multiple fronts, the oath to “support and defend” the Constitution, the foundation of our nation, is today as important as when it was penned.

“Those who expect to reap the blessings of freedom must, like men, undergo the fatigue of supporting it.” ~Thomas Paine

Victory Garden

“A wartime vegetable garden developed to increase food production especially by home gardeners.” ~Webster’s Dictionary. See our site dedicated to W.W. II-era Victory Gardening in America.

W

No entries

X

No entries

Y

No entries

Z

No entries

Notes and References:

  1. Tomato Culture, Will W. Tracy, Orange Judd Company, pg. 100, 1919)

Copyright © 1998 - 2024 - All rights reserved
WebGrower.com℠ is a service mark of Victory Horticultural Group, LLC.
• Privacy Statement •

This site participates in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.

If you found this post helpful, please consider a small donation to help support this work.

Thank you for your consideration and support.