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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 korczaginii

HABIT Perennial. Rhizomes elongated. Culms erect; 25–50 cm long. Culm-internodes distally glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1.3–1.6 mm long; entire, or lacerate; obtuse. Leaf-blades 6.5–9.5 cm long; 2.5 mm wide. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins scabrous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 4–12 cm long; 0.8–1 cm wide. Primary panicle branches 4–9 -nate; whorled at most nodes; 2.5–3 cm long. Panicle branches capillary; scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; terete.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 2.2–3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.3–0.4 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 2.2–3 mm long; 1.1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acute. Upper glume lanceolate; 2.1–2.7 mm long; 1.1–1.3 length of adjacent fertile lemma; membranous; purple; 1-keeled; 1 -veined. Upper glume primary vein smooth. Upper glume lateral veins absent. Upper glume surface asperulous. Upper glume apex acute.

FLORETS Fertile lemma oblong, or ovate; 2–2.1 mm long; 0.8–1.1 mm wide; hyaline; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma surface asperulous; puberulous. Lemma apex truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33 way up back of lemma; straight, or geniculate; 3.5–3.7 mm long overall; without a column, or with twisted column. Palea 0.8–0.9 mm long; 0.33–0.5 length of lemma; hyaline; 2 -veined.

FLOWER Lodicules 2; lanceolate; 0.3–0.4 mm long; membranous. Anthers 3; 1.2–1.7 mm long. Stigmas 2; laterally exserted.

FRUIT Caryopsis with adherent pericarp; apex unappendaged. Hilum punctiform.

DISTRIBUTION Europe: eastern.

NOTES Aveneae. Tsvelev 1996.

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