Acute

Sharp at the end; pointed.

Alternate (of leaves, etc.)

Not opposite each other but distributed at different heights along the stem or branch.

Annual

Of only one year's duration. Winter annual, a plant which sprouts in the fall, blooms the following spring, fruits and then dies.

Apex

The top or tip of the leaf, flower, etc.

Appendage

Something added to or accompanying a principal or greater thing though not necessary to it.

Appressed

Lying close and flat against.

Ascending

Curving upward.

Awn

A bristle-like appendage.

Axil

The angle formed by a leaf or branch with the stem.

Bacteria

A class of extremely small plants visible only by the aid of a microscope.

Barren

Fruitless; incapable of bearing seeds.

Basal

Connected with or belonging to the base.

Base

That extremity of a leaf, fruit, etc., at which it is attached to its support.

Biennial

A biennial plant requires two seasons to complete its growth. The first is spent in collecting and storing up nourishment and the second in producing flowers and seeds, after which the plant dies.

Bristle

A stiff, sharp, roundish hair.

Compound

Composed of two or more similar parts united into one whole. Compound leaf, one divided into separate leaflets.

Compressed

Flattened.

Corneous

Horny; horn-like.

Cotyledon

See pages 8 and 13.

Creeping

Running along at or near the surface of the ground and rooting.

Cross-fertilization

The fertilization of a plant by pollen from another individual.

Decumbent

Bending or lying down, but with the summit ascending.

Embryo

The part of the seed which develops into a plant.

Endosperm

See page 8.

Erect

Straight; upright.

Fertilize

To make fruitful.

Fertilization

The process by which the pollen renders the ovule fertile; fruit-making.

Genus

An assemblage of species possessing certain characteristics in common.

Glabrous

Smooth; destitute of hairs.

Glaucous

Of a sea-green or grayish-blue color.

Glume

See page 10.

Hybrid

An animal or plant produced from the mixture of two species.

Indigenous

Native to a certain country or district.

Inflorescence

The flowering part of a plant, and especially the mode of its arrangement.

Inoculate

To furnish the soil with certain kinds of bacteria.

Internode

The portion of a stem between two adjacent nodes.

Keel

A central ridge, like the keel of a boat; see also page 16.

Knee-bent

Bent so as to form an angle.

Lateral

Proceeding from the side.

Leaflet

A single division of a compound leaf.

Legume

A single seed vessel, having the seeds attached along one side only.

Leguminous

Pertaining to a legume or to the Leguminosce.

Lemma

See page 10.

Ligule

See page 9.

Midrib

The central or main rib of a leaf.

Node

The joint of a stem, or the part where a leaf or several leaves are attached.

Nodule

A little knot or lump.

Ovary

The part of the pistil in which the seeds are formed.

Palea

See page 10.

Panicle

A loose, irregularly-compound inflorescence with flowers or groups of flowers on distinct stalks.

Perennial

Lasting more than two years.

Petal

See page 16.

Pistil

See page 16.

Pollen

The fecundating powder produced in the stamens.

Raceme

An inflorescence bearing stalked flowers along a common, more or less elongated, main stalk.

Radicle

Rootlet; see page 13.

Rootstock

Underground stem, rooting at the nodes and generally creeping near the surface.

Runner

A slender creeping branch, from the base of the stem or from a rootstock, which is capable of forming independent plants.

Self-fertilization

The fertilization of a plant by its own pollen.

Self-sterile

Unable to produce seed unless fertilized by another individual.

Sheath

A tubular envelope, as the lower part of the leaf in grasses.

Species

A class of individuals possessing the same forms and properties which they transmit to their offspring.

Spikelet

See page 10.

Stamen

The male organ of a flower; see page 10.

Standard

See page 16.

Sterile

Barren; unable to produce seed.

Stipule

See page 15.

Taproot

A root which is the prolongation downwards of the stem.

Trifoliate

Having three leaflets.

Tubercle

A nodule.

Whorl

An arrangement of leaves, etc., in a circle around the stem.