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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 lazica

HABIT Perennial; caespitose. Rhizomes elongated. Culms erect, or geniculately ascending; 5–30 cm long. Culm-internodes smooth; distally glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1.5–2 mm long; truncate. Leaf-blades conduplicate; 2–7.5 cm long; 0.8–2 mm wide. Leaf-blade surface scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear, or oblong; dense; 2–8 cm long; 0.4–2 cm wide. Primary panicle branches appressed; 0.5–3 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; terete; 0.5–1.5 mm long; glabrous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 2–2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.1–0.2 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 1 length of upper glume; membranous; 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; 1.1–1.2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma elliptic to oblong; 1.8–2 mm long; hyaline; without keel; 3–5 -veined. Lemma apex truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.25–0.33 way up back of lemma; straight; 2–2.5 mm long overall; clearly exserted from spikelet. Palea oblong; 0.8–1 mm long; 0.5 length of lemma; hyaline; 2 -veined.

FLOWER Lodicules 2; lanceolate; membranous. Anthers 3; 0.6–0.8 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum linear. Endosperm farinose.

DISTRIBUTION Asia-temperate: Caucasus and western Asia.

NOTES Aveneae. Fl Turk 1997.

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