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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 personata

HABIT Perennial; caespitose; clumped loosely. Basal innovations extravaginal. Culms geniculately ascending; 6.5–30 cm long. Leaf-sheaths smooth. Ligule an eciliate membrane; 0.8–2 mm long; scaberulous on abaxial surface; erose; truncate, or obtuse. Leaf-blades flat, or conduplicate, or involute; 2–8 cm long; 0.5–1.5 mm wide; flaccid. Leaf-blade surface scabrous; rough adaxially, or on both sides. Leaf-blade margins smooth, or scaberulous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth.

Panicle open; lanceolate, or pyramidal; 4.5–8.5 cm long. Primary panicle branches spreading. Panicle axis scaberulous. Panicle branches capillary; with occasional prickles.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 2–3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 2–3.5 mm long; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2–3.5 mm long; membranous; with hyaline margins; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma ovate; 1.4–2 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins extending close to apex. Lemma apex entire, or erose; truncate; muticous, or awned; 1 -awned. Principal lemma awn dorsal; arising 0.5–0.66 way up back of lemma; straight; 1–3 mm long overall. Palea 0.3–0.6 mm long; 0.25 length of lemma; hyaline.

FLOWER Lodicules 2; 0.3–0.6 mm long; membranous. Anthers 3; 0.4–0.7 mm long.

FRUIT Caryopsis with adherent pericarp; 1–1.5 mm long. Hilum linear.

DISTRIBUTION Australasia: New Zealand.

NOTES Aveneae. Edgar 1994.

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