Trisetaria koelerioides

HABIT Annual; caespitose. Culms 9–25 cm long. Ligule an eciliate membrane. Leaf-blades 2–6 cm long; 1–2 mm wide.

INFLORESCENCE Inflorescence a panicle; embraced at base by subtending leaf.

Panicle spiciform; linear; 4–8 cm long. Panicle branches pubescent.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets cuneate; laterally compressed; 6–7 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; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 5.5–6.5 mm long; 0.9 length of upper glume; chartaceous; 1-keeled; 3 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins ribbed. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate; 6–7 mm long; 1.7 length of adjacent fertile lemma; chartaceous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins ribbed. Upper glume surface asperulous. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 3.5–4 mm long; membranous; keeled; 5 -veined. Lemma lateral veins obscure. Lemma surface asperulous. Lemma apex dentate; 2 -fid; acuminate; mucronate, or awned; 1 -awned. Principal lemma awn apical; straight; 0–2 mm long overall. Palea gaping; linear; 0.7–0.8 length of lemma; hyaline. Palea keels scaberulous. Palea apex dentate; 2 -fid.

FLOWER Lodicules 2; membranous. Anthers 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: western Asia and Arabia.

NOTES Aveneae. WDC.

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