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.

Racemobambos sessilis

HABIT Perennial; caespitose; clumped loosely. Culms leaning; 2000 cm long; 5 mm diam.; woody. Culm-internodes terete; with small lumen; 40–50 cm long. Culm-nodes pubescent. Lateral branches dendroid. Branch complement several; with subequal branches, or 1 branch dominant. Culm-sheaths deciduous; 8.5–12.5 cm long; chartaceous; hispid; with white hairs, or black hairs; glabrous on margins, or hairy on margins; without auricles; setose on shoulders; shoulders with 10–12 mm long hairs. Culm-sheath ligule 0.5–1 mm high; entire. Culm-sheath blade lanceolate; as wide as sheath at base; erect; 1.3–6.5 cm long; 1–2 mm wide. Leaves cauline. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs setose; 8–13 mm long. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades linear; 4.5–16.5 cm long; 3–5 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence composed of racemes; bracteate at pedicel base; embraced at base by subtending leaf.

Racemes 1; single; paucilateral; 3–4 cm long; bearing few fertile spikelets.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–8 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 24–28 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2–3 mm long; pubescent.

GLUMES Glumes one the lower absent or obscure; persistent; shorter than spikelet. Upper glume ovate; 8 mm long. Upper glume apex acute; mucronate.

FLORETS Fertile lemma ovate; 8–10 mm long; chartaceous; without keel. Lemma apex acute; mucronate. Palea 6–7 length of lemma; 2 -veined; 2-keeled but the uppermost without keels (weakly). Apical sterile florets 1 in number; rudimentary.

FLOWER Lodicules absent. Anthers 6; 3 mm long; yellow. Stigmas 3. Ovary with a few apical hairs.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Bambuseae. Widjaja 2002.

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