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Descriptions

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

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

Sinobambusa humila

HABIT Perennial. Culms erect; 50–100 cm long; woody; without nodal roots. Culm-internodes terete; hollow; distally mealy. Culm-nodes pubescent. Lateral branches dendroid. Branch complement three; with subequal branches; thinner than stem. Culm-sheaths persistent; green, or purple; pilose; hairy at the base; auriculate; setose on shoulders. Culm-sheath blade lanceolate; erect, or reflexed; scabrid. Leaves cauline. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs setose; pale. Leaf-sheath auricles falcate. Ligule an eciliate membrane; pubescent on abaxial surface. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades oblong; 9–16 cm long; 10–24 mm wide. Leaf-blade surface smooth, or scaberulous; rough abaxially; glabrous. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; fasciculate; lax; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets.

Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 8–20 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 40–90 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 4 mm long; pilose; hairy above.

GLUMES Glumes several; 4 empty glumes; persistent; similar; shorter than spikelet. Lower glume ovate; 3–4 mm long; 1-keeled. Lower glume apex acute. Upper glume ovate; 5.5–6 mm long; 1-keeled. Upper glume apex acute.

FLORETS Fertile lemma ovate; 8.5 mm long; chartaceous; without keel; 9 -veined. Lemma lateral veins obscure. Lemma margins ciliate. Lemma apex acute. Palea chartaceous. Palea keels ciliolate; adorned above. Palea apex obtuse. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; ciliate. Anthers 3. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. McClure 1996.

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