Awn/bristle: A slender, hair-like structure found on the spikelets of many grasses.
Blade: The upper portion of the leaf, which is divided from the sheath by the collar and the ligule.
Collar: The area on the outer side of the leaf where the blade and the sheath join.
Culm: The stem of a grass.
Florets: A small flower.
Glume: One of a pair of dry membranous bracts at the base of the spikelet of grasses.
Inflorescence: The part of a plant that consists of a cluster flower bearing stalks.
Internode: The part of a plant stem between two nodes.
Lemma: The outer bract that encloses the flower in a grass spikelet.
Ligule: The structure that clasps the stem at the junction of blade and sheath.
Node: The point on a plant stem from which the leaves or lateral branches grow.
Palea: The inner bract that encloses the flower in a grass spikelet.
Panicle: A branched cluster of flowers in which the branches are racemes.
Plant Architecture: Structures of the plant, leaves, stems, roots, and the patterns they take.
Raceme: A type of inflorescence that is unbranched and bears flowers having short stalks along the axis.
Shatter: When the seed head breaks apart, releasing seeds.
Sheath: The tubular portion of the leaf, which wraps around or encloses the stem.
Spike: An inflorescence consisting of a raceme of flowers growing directly from the stem.
Spikelet: A flowering structure common to grasses, where a reduced flower is encased in several protective structures.
Tiller: A shoot that arises from the base of the stem in grasses.