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Descriptions

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

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

Agrostis nevadensis

HABIT Perennial; caespitose. Culms erect; 6–60 cm long. Culm-internodes antrorsely scabrous. Leaf-sheaths without keel; smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; 4–6 mm long; entire, or lacerate. Leaf-blades filiform; 5–15 cm long; 0.5–0.8 mm wide. Leaf-blade surface scabrous; rough on both sides. Leaf-blade apex obtuse, or abruptly acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 5–10 cm long. Primary panicle branches ascending, or spreading; whorled at most nodes. Panicle axis scabrous. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous; tip rectangular.

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 pubescent. Floret callus hairs 0.4 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 2–2.5 mm long; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2–2.5 mm long; 1.2 length of adjacent fertile lemma; membranous; purple; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma oblong; 1.8 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins extending close to apex. Lemma apex erose; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.25 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; 1.2 mm long; yellow.

FRUIT Caryopsis with adherent pericarp; oblong; sulcate on hilar side; 1.4–1.5 mm long; light brown. Embryo 0.25–0.33 length of caryopsis. Hilum elliptic.

DISTRIBUTION Europe: southwestern. Africa: north.

NOTES Aveneae. Fl Afr N 1994.

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