Achene - A small dry one-seeded fruit in which the ovary wall is free from the seed
Anther - Enlarged part at the top of the stamen; bears the pollen
Awn - A bristle or spine, as at the tip of some bracts of grasses
Axil - The upper angle between the stem and the leaf
Bract - A modified leaf underneath a flower or inflorescence
Bur - A rough or prickly envelope around a seed or fruit
Calyx - The outer set of floral leaves, usually green, composed of all the sepals
Corolla - The set of floral leaves, usually showy, composed of all the petals
Deciduous - Dropping off; shedding of leaves at the end of the growing season
Dehiscent - Splitting open at maturity
Disk flowers - The tubular flowers in the center of the flower heads in the sunflower family
Embryo - A young plant enclosed in a seed
Floret - A small flower in the spikelet of the grasses, or the flower head of the sunflower family
Flower head - A dense inflorescence of stalkless flowers
Frond - The leaf of a fern
Fruit - The seed case or seed pod (the ripened ovary); containing anywhere from one to many seeds
Glands - Secreting tissue
Glumes - A pair of bracts at the base of the grass spikelet
Grain - The seedlike dispersal unit of the grass family
Inferior ovary - Where the sepals, petals, and stamens appear to rise from the very top of the ovary
Inflorescence - The arrangement of flowers on a stalk where several are present, as a spike, raceme, head, panicle
Involucre - A cluster of bracts
Keel - A central dorsal ridge; the two united petals in some legume flowers
Leaflet - A division of a compound leaf
Mycorrhiza - Formed by a combination of underground threads and rootless
Node - That position on the stem where a leaf, leaves, or branch arises
Nutlet - A small nut; the one-seeded portion of a larger fruit that separates at maturity
Ovary - Base of the female part of the flower (pistil); ripens into the fruit
Panicle - A loose, irregularly branched inflorescence with stalked individual flowers
Pappus - The modified calyx of a disk or rayflower in the sunflower family
Petaloid - Petallike
Ray flower-Marginal petallike flowers in the inflorescence of the sunflower family
Rhizome - A horizontal underground stem
Rosette - A cluster of spreading or radiating basal leaves
Runner - A horizontal aboveground stem; a stolon
Sepal - One of the outer set of floral leaves or calyx, usually green
Sheath - The basal portion of the leaf which clasps the stem
Spike - An unbranched inflorescence in which the flowers are not stalked
Spikelet - The unit of the inflorescence in grasses
Stamen - The male portion of the flower
Stipule - One of a pair of appendages at the base of the leaf
Stolon - A horizontal, underground stem
Succulent - Soft and fleshy in texture
Tuber - A swollen underground stem
Volva - The membraneous envelope enclosing an immature mushroom
Whorl - Three or more leaves or flowers arising from the same node