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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Indocalamus pedalis
HABIT Perennial; culms solitary. Rhizomes elongated; leptomorph. Culms erect, or geniculately ascending; 15 cm long; 1–1.5 mm diam.; woody. Culm-internodes terete; 1–5 cm long. Lateral branches suffrutescent. Bud complement 1. Branch complement one; solitary; as thick as stem. Leaves cauline; 1–2 per branch. Leaf-sheaths glabrous on surface, or puberulous. Ligule an eciliate membrane, or a ciliolate membrane; 1 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2–0.4 cm long; petiole glabrous, or pubescent. Leaf-blades deciduous at the ligule; lanceolate; 6.5–15 cm long; 9–17 mm wide. Leaf-blade venation with 8–12 secondary veins; with distinct cross veins. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence composed of racemes; exserted, or embraced at base by subtending leaf.
Racemes 1; single; 10–11 cm long; bearing few fertile spikelets; bearing 4–8 fertile spikelets on each. Rhachis pubescent on surface.
Spikelets appressed, or ascending; solitary. Fertile spikelets pedicelled. Pedicels 2–20 mm long; pubescent.
FERTILE SPIKELETS Spikelets comprising 4–11 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 20–60 mm long; 3–5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes compressed; 4–5 mm long; pubescent; hairy above. Floret callus pubescent. Floret callus hairs 0.8 mm long.
GLUMES Glumes several; 3–4 empty glumes; persistent; similar; shorter than spikelet. Lower glume lanceolate; 4–5 mm long; chartaceous; without keels. Lower glume surface pubescent. Lower glume apex acute. Upper glume lanceolate; 7–8 mm long; chartaceous; without keels. Upper glume surface pubescent. Upper glume apex acute.
FLORETS Fertile lemma ovate; 7–10 mm long; chartaceous; without keel. Lemma lateral veins with cross-veins. Lemma surface pubescent; hairy above. Lemma apex attenuate. Palea 1 length of lemma; chartaceous. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 3; 3 mm long; veined; ciliate. Anthers 3; 5–6 mm long. Stigmas 2. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp.
DISTRIBUTION Asia-temperate: China.
NOTES Arundinarieae. Keng 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
