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.

Sphaerobambos hirsuta

HABIT Perennial; caespitose; clumped loosely. Rhizomes short; pachymorph. Culms leaning, or scandent; zigzag; 1000 cm long; 30–40 mm diam.; woody. Culm-internodes terete; hollow; 20–40 cm long; smooth, or antrorsely scabrous; distally glabrous, or pubescent. Lateral branches dendroid. Branch complement several; with 1 branch dominant. Culm-sheaths 10–20 cm long; antrorsely scabrous; pilose; auriculate; with 7 mm high auricles; ciliate on shoulders; shoulders with 6–7 mm long hairs. Culm-sheath blade ovate; spreading, or reflexed; 10–25 cm long; 60 mm wide; pubescent. Leaf-sheaths pubescent. Leaf-sheath oral hairs ciliate; 6 mm long. Leaf-sheath auricles falcate; 5 mm long. Ligule an eciliate membrane; lacerate. Leaf-blade base broadly rounded; with a brief petiole-like connection to sheath; petiole pubescent. Leaf-blades lanceolate; 11–23 cm long; 30–40 mm wide. Leaf-blade surface pubescent; hairy on both sides. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in stellate clusters; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafy between clusters, or leafless between clusters.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 15 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes several; 3 empty glumes; persistent; similar; shorter than spikelet. Lower glume ovate; 1–1.5 mm long; 0.7–0.8 length of upper glume; chartaceous; without keels; 3 -veined. Lower glume surface pubescent. Lower glume margins ciliate. Lower glume apex obtuse. Upper glume ovate. Upper glume surface pubescent.

FLORETS Fertile lemma ovate; 7 mm long; chartaceous; without keel; 3 -veined. Lemma margins ciliate. Lemma apex obtuse. Palea 6 -veined. Palea keels winged; narrowly winged. Palea surface pubescent; hairy on flanks.

FLOWER Lodicules absent. Anthers 6. Stigmas 3. Ovary umbonate; glabrous.

FRUIT Caryopsis with adherent pericarp; orbicular; isodiametric; 6 mm long.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Bambuseae. Bam Sabah 1996.

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