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Inflorescences

Dissections:
Tridens flavus

TRIDENS Schult. & Schult. Tridens (adapted from Gould & Box 1965)
Plants hermaphroditic, caespitose, perennial. Culms erect, glabrous; internodes solid, terete. Leaves basal and cauline; sheaths terete or with compressed keels, margins open; auricles absent; ligules a ciliate membrane or line of hairs; blades flat or involute, not pungent. Panicles open or contracted; primary branches spreading or ascending or appressed (spreading secondary branches), terminating in a spikelet. Spikelets solitary, laterally compressed, pedicellate; pedicels without glands; disarticulation above glumes; florets 4 - 10, callus glabrous; reduced florets at apex; glumes 1 - several veined, unequal to nearly equal, shorter than or equaling spikelet, glabrous; lemmas 3-veined, hyaline or membranous, emarginate, mucronate, veins hairy; paleas 2-veined, awnless, glabrous to hairy. Stamens 3; anthers reddish purple. Caryopses dorsiventrically compressed. Base chromosome number x = 10.

Primarily a New World genus of about 18 species. This genus is widely distributed throughout the southeastern United States. Tridens is reported to be related to Leptochloa, Trichoneura and Tripogon (Peterson et al., 1997).