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Descriptions

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

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

Stipa coreana

HABIT Perennial; culms solitary. Rhizomes short. Culms erect; 70–100 cm long; 2–3 mm diam.; 7–8 -noded. Leaf-sheaths puberulous. Ligule an eciliate membrane; 0.7–0.8 mm long; erose; truncate. Leaf-blades linear, or lanceolate; 10–30 cm long; 10–20 mm wide. Leaf-blade surface scabrous; rough on both sides.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 18–35 cm long; 2–3 cm wide. Primary panicle branches appressed; 1–2 -nate; 4–8 cm long; bearing 2–4 fertile spikelets on each lower branch.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–5 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; compressed slightly; 13–16 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent; acute.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; herbaceous; without keels; 7–9 -veined. Lower glume lateral veins with cross-veins. Lower glume apex acute. Upper glume lanceolate; 13–15 mm long; herbaceous; without keels; 7–9 -veined. Upper glume lateral veins with cross-veins. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; subterete; 10–13 mm long; membranous; mid-green, or light brown; without keel; 5 -veined. Lemma surface pubescent. Lemma margins flat; covering most of palea. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; straight; 22–35 mm long overall; without a column, or with a straight or slightly twisted column. Palea 0.9 length of lemma; 2 -veined; without keels. Palea surface pubescent; hairy on back.

FLOWER Lodicules 2. Anthers 3; 7 mm long; anther tip penicillate. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: China and eastern Asia.

NOTES Stipeae. Koyama 1994.

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