Trisetaria myriantha

HABIT Annual. Culms 20–60 cm long. Ligule an eciliate membrane. Leaf-blades involute; 6–12 cm long; 1–2 mm wide. Leaf-blade surface pubescent; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 6–20 cm long; 1–3 cm wide. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with a barren rhachilla extension. Spikelets oblong, or cuneate; laterally compressed; 2.4–3.3 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; glabrous. Floret callus glabrous.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma; shiny; gaping. Lower glume ovate; 2.4–3.3 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex attenuate. Upper glume ovate; 2.4–3.3 mm long; 2 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume apex attenuate.

FLORETS Fertile lemma obovate; 1.2–1.7 mm long; cartilaginous; keeled; 5 -veined. Lemma surface glabrous, or pubescent. Lemma margins ciliolate. Lemma apex lobed; 2 -fid; with linear lobes; incised 0.33 of lemma length; awned; 1 -awned. Principal lemma awn dorsal; arising 0.4 way up back of lemma; geniculate; 2–3 mm long overall; with twisted column. Palea gaping; hyaline.

FLOWER Lodicules 2; membranous. Anthers 3; 1 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Europe: southeastern.

NOTES Aveneae. Fl Eur.

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