Dissanthelium calycinum

HABIT Perennial; caespitose. Culms 2.5–8 cm long. Ligule an eciliate membrane; 0.5–1 mm long. Leaf-blades involute; 1–3 cm long; 0.5–1 mm wide. Leaf-blade surface scaberulous; rough adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; oblong, or ovate; 1–2 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 2.4–3 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.2–0.3 mm long.

GLUMES Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex acute. Upper glume ovate; 2.4–3 mm long; 1.3–1.4 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma ovate; 1.8–2.1 mm long; chartaceous; keeled; 3 -veined. Lemma lateral veins close to margins. Lemma surface asperulous. Lemma apex obtuse, or acute. Palea keels scaberulous.

FLOWER Anthers 3; 0.5–0.7 mm long. Ovary glabrous.

FRUIT Endosperm farinose.

DISTRIBUTION North America: Mexico. South America: western South America.

NOTES Aveneae. WDC.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.