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Descriptions

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

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

Vietnamocalamus

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 150–250 cm long; woody. Culm-internodes terete. Lateral branches suffrutescent. Branch complement one. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Leaf-blades lanceolate.

INFLORESCENCE Inflorescence comprising only a few spikelets; axillary; embraced at base by subtending leaf.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets linear; subterete; 12.45–18 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus glabrous.

GLUMES Glumes several; persistent; shorter than spikelet. Lower glume lanceolate; chartaceous; without keels. Lower glume surface without pits. Upper glume lanceolate; chartaceous; without keels.

FLORETS Fertile lemma lanceolate; chartaceous; without keel; wingless; 7 -veined. Lemma surface unwrinkled; without grooves. Palea chartaceous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Temperate Asia, or Tropical Asia.

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