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Descriptions

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

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

Pseudosasa pubiflora

HABIT Perennial. Culms 120 cm long; woody. Culm-internodes terete; 4–5.5 cm long. Lateral branches suffrutescent. Branch complement two to three. Leaves cauline; 1–2 per branch. Leaf-sheaths 3 cm long; puberulous; outer margin glabrous, or hairy. Leaf-sheath oral hairs setose; 12 mm long. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2–0.3 cm long. Leaf-blades oblong; 8–18 cm long; 11–15 mm wide. Leaf-blade venation with obscure cross veins. Leaf-blade surface glabrous, or puberulous; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes; exserted, or embraced at base by subtending leaf.

Racemes 1; single; 3–9 cm long; bearing 3–5 fertile spikelets on each.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 5–9 mm long; puberulous.

FERTILE SPIKELETS Spikelets comprising 2–4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 16–20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated between glumes. Rhachilla elongation 1 mm long. Rhachilla internodes 3–4 mm long; pubescent; hairy above. Floret callus pilose.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 7–10 mm long; chartaceous; without keels. Lower glume surface puberulous; hairy above. Lower glume apex acuminate. Upper glume lanceolate; 7–12 mm long; chartaceous; without keels. Upper glume surface puberulous; hairy above. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 10–12 mm long; chartaceous; without keel; 9 -veined. Lemma surface pubescent. Lemma apex acuminate. Palea 7–8 mm long; chartaceous. Palea keels ciliate. Palea apex entire; obtuse. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 2 mm long; veined; ciliate. Anthers 3; 5 mm long; brown. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Keng 1996.

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