GrassBase - The Online World Grass Flora


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

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

Calamagrostis kengii

HABIT Perennial; caespitose; clumped densely. Culms 90–135 cm long. Lateral branches lacking. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 3–4(–7) mm long; entire, or lacerate; truncate. Leaf-blades convolute; 25–35 cm long; 5 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins scaberulous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; interrupted; 12–17(–22) cm long; 1.2–2.5 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6–7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 5.5–6.9 mm long; 1.3–1.5 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 6–7 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 6–7 mm long; 1.4 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 4–5 mm long; membranous; without keel; 3 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66 way up back of lemma; straight; 2.5–3 mm long overall. Palea 2.6–3 mm long; 0.6–0.8 length of lemma; hyaline; 2 -veined. Palea keels scaberulous. Rhachilla extension 0.5–0.8 mm long; pilose; hairy above.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: China.

NOTES Aveneae. Wang 1996.

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