Agrostis tateyamensis

HABIT Perennial; caespitose. Culms geniculately ascending; 15–30 cm long. Ligule an eciliate membrane; 0.5–2 mm long; obtuse. Leaf-blades flat, or involute; 3–10 cm long; 0.5–2 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 5–12 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 1.9–2.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 1.9–2.8 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 1.9–2.8 mm long; 1.1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 1.8–2.5 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins obscure; extending close to apex. Lemma apex truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 1.4–3.2 mm long overall; with twisted column. Palea absent or minute.

FLOWER Lodicules 2; membranous. Anthers 3; 0.5–0.8 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: eastern Asia.

NOTES Aveneae. Tateoka 2002.

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