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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 angrenica

HABIT Perennial. Culms erect, or geniculately ascending; 20–30 cm long; 1–2 -noded. Culm-internodes smooth. Leaf-sheaths 4–6 cm long; smooth. Ligule an eciliate membrane; 2 mm long; pubescent on abaxial surface; lacerate. Leaf-blades 2.5–4 cm long; 2–2.5 mm wide. Leaf-blade surface scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; linear, or lanceolate; 3–7 cm long; 1–1.5 cm wide. Primary panicle branches appressed; 1–4 -nate; 0.5–1.8 cm long. Panicle branches with occasional prickles.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2–2.2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.5 length of lemma.

GLUMES Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 2–2.2 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 surface smooth, or asperulous; rough above. Lower glume apex acute. Upper glume lanceolate; 2–2.2 mm long; 1 length of adjacent fertile lemma; membranous; purple; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume surface smooth, or asperulous; rough above. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 2–2.2 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma surface puberulous. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; straight, or curved; 3–3.5 mm long overall. Palea 1.5 mm long; 0.75 length of lemma; hyaline.

FLOWER Lodicules 2; membranous. Anthers 3; 1.2 mm long.

FRUIT Caryopsis with adherent pericarp; ovoid; 1.5 mm long. Hilum linear.

DISTRIBUTION Asia-temperate: Soviet Middle Asia.

NOTES Aveneae. Butk 1995.

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