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Descriptions

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

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

Pseudoxytenanthera parvifolia

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 15–17 mm diam.; woody. Culm-internodes terete. Lateral branches dendroid. Branch complement several. Culm-sheaths 20–25 cm long; 1 times as long as wide; pubescent; with appressed hairs; with tawny hairs; truncate at apex. Culm-sheath ligule 10–18 mm high; dentate. Culm-sheath blade ovate; 5–8 cm long; 25 mm wide; acuminate. Leaf-sheaths pubescent. Leaf-sheath oral hairs scanty. Ligule an eciliate membrane; pubescent on abaxial surface; erose; acute. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2 cm long. Leaf-blades lanceolate; 7–12 cm long; 12 mm wide. Leaf-blade surface puberulous; hairy abaxially. Leaf-blade margins scabrous.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in stellate clusters; dense; 2.5–5 cm between clusters; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafless between clusters.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 15–20 mm long; 2.5–5 mm wide; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes suppressed between florets.

GLUMES Glumes several; 2–3 empty glumes; persistent; similar; shorter than spikelet. Upper glume ovate. Upper glume margins eciliate. Upper glume mucronate.

FLORETS Fertile florets increasing in size upwards. Fertile lemma ovate; 10–12 mm long; chartaceous; without keel. Lemma apex acute. Palea 1 length of lemma; 3–5 -veined; 2-keeled but the uppermost without keels. Palea keels ciliolate. Apical sterile florets 1 in number; barren.

FLOWER Lodicules absent. Anthers 6; anther tip smooth. Filaments united in a tube. Stigmas 1–2; plumose. Ovary umbonate; pubescent all over.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Bambuseae. Gamble 1996.

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