Agrostis hooveri

HABIT Perennial; caespitose; clumped densely. Culms erect; slender; 55–75 cm long. Lateral branches lacking. Ligule an eciliate membrane; 3–3.5 mm long; lacerate. Leaf-blades filiform; 10–15 cm long; 0.5–1 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate, or ovate; 7–17 cm long. Primary panicle branches ascending. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2–2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny. Lower glume lanceolate; 2–2.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2–5 mm long; membranous; 1-keeled; 1 -veined. Upper glume primary vein smooth. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma elliptic; 2 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins extending close to apex. Lemma surface scaberulous. Lemma apex erose; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1–0.2 way up back of lemma; geniculate; 3–3.5 mm long overall; with twisted column. Palea absent or minute.

FLOWER Lodicules 2; membranous. Anthers 3; 0.75–1.5 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION North America: southwest USA.

NOTES Aveneae. Man US Gr 1994.

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