GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Agrostis hirta

HABIT Perennial. Basal innovations intravaginal. Culms erect; 60–120 cm long. Leaf-sheaths smooth. Ligule an eciliate membrane; 7.5 mm long; erose; obtuse. Leaf-blades flat, or involute; 15–30 cm long; 2–3 mm wide; flaccid. Leaf-blade surface scabrous.

INFLORESCENCE Inflorescence a panicle. Peduncle antrorsely scabrous above.

Panicle open; elliptic; effuse; 30 cm long; 8 cm wide. Primary panicle branches 6–12.5 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.3–4.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.35–0.5 mm long; 0.1–0.2 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 4.3–4.8 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 4.3–4.8 mm long; 1.6 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 2.65–2.85 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins extending close to apex. Lemma surface pubescent. Lemma apex erose; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.4–0.5 way up back of lemma; geniculate; 5.5–6.5 mm long overall; with twisted column. Column of lemma awn 1.6–3.25 mm long. Palea 1.25 mm long; 0.4–0.5 length of lemma; hyaline; 2 -veined. Rhachilla extension 0–0.25 mm long; glabrous.

FLOWER Lodicules 2; membranous. Anthers 3; 0.75–0.9 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Aveneae. Veldkamp 1994.

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