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.

Himalayacalamus porcatus

HABIT Perennial; caespitose; clumped densely. Rhizomes short; pachymorph. Culms drooping at the tip; 300–600 cm long; 10–25 mm diam.; woody; without nodal roots. Culm-internodes terete; hollow; 15–30 cm long; mid-green; ridged; distally pruinose. Culm-nodes swollen. Lateral branches dendroid. Bud prophyll 1-keeled. Branch complement many. Culm-sheaths deciduous; 5 times as long as wide; coriaceous; glabrous; without auricles; setose on shoulders; shoulders with straight hairs; shoulders with 6 mm long hairs. Culm-sheath ligule 1–4 mm high; lacerate. Culm-sheath blade linear; demarcated but persistent; erect; 2–5 cm long; 2 mm wide. Leaf-sheaths striately veined; glabrous on surface; outer margin glabrous, or hairy. Leaf-sheath oral hairs setose; erect; 2–4 mm long; pale. Ligule an eciliate membrane; 1–4 mm long; glabrous on abaxial surface, or pubescent on abaxial surface; truncate, or acute. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole pubescent. Leaf-blades lanceolate; 9–19 cm long; 6–12 mm wide. Leaf-blade surface glabrous, or pubescent; hairy abaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; contracted about primary branches. Panicle branches with insignificant pulvini.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3–9 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 9–11 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 7–9 mm long; chartaceous; without keels. Lower glume apex acute. Upper glume elliptic; 7–9 mm long; chartaceous; without keels. Upper glume apex acute.

FLORETS Fertile lemma 8–10 mm long; chartaceous; without keel. Lemma surface scabrous; inner surface glabrous, or pubescent. Lemma margins ciliolate; hairy above. Palea 9–11 mm long; 1.1 length of lemma; 2 -veined; without keels. Palea apex entire. Rhachilla extension 2–4 mm long. Apical sterile florets distinct from fertile; 1 in number; rudimentary.

FLOWER Lodicules 3. Anthers 3.

FRUIT Caryopsis with adherent pericarp; 6.5 mm long; apex unappendaged.

DISTRIBUTION Asia-tropical: India.

NOTES Arundinarieae. Stapleton 1995.

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