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Descriptions

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

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

Indocalamus herklotsii

HABIT Perennial; caespitose. Rhizomes elongated; leptomorph. Culms erect; 150–200 cm long; 5–6 mm diam.; woody. Culm-internodes terete; solid. Lateral branches suffrutescent. Bud complement 1. Branch complement one; solitary; as thick as stem. Culm-sheaths persistent; glabrous on margins, or hairy on margins; without auricles; glabrous on shoulders, or ciliate on shoulders. Culm-sheath blade lanceolate to ovate; erect; acuminate. Leaves cauline; 3 per branch. Leaf-sheaths outer margin hairy. Leaf-sheath oral hairs lacking, or setose; dark. Ligule a ciliolate membrane. Leaf-blade base with a brief petiole-like connection to sheath; petiole glabrous, or pubescent. Leaf-blades lanceolate; 14–29 cm long; 10–47 mm wide. Leaf-blade venation with distinct cross veins. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; 7–8 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3–15 mm long.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; compressed slightly; 9–15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes compressed; scaberulous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 5–5.5 mm long; 0.7–0.8 length of upper glume; chartaceous; without keels. Lower glume apex obtuse. Upper glume lanceolate; 6.5–8 mm long; 1.1 length of adjacent fertile lemma; chartaceous; without keels. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 6–7 mm long; chartaceous; without keel; 5 -veined. Lemma apex obtuse; mucronate. Palea 1 length of lemma; chartaceous. Palea keels ciliolate; adorned above. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 1.25 mm long. Anthers 3; 5 mm long. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. WDC.

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