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.

Chusquea oligophylla

HABIT Perennial. Culms scandent; 3–5 mm diam.; woody; without nodal roots. Culm-internodes terete; solid; 30 cm long; smooth, or scaberulous; distally glabrous. Culm-nodes glabrous. Lateral branches dendroid. Branch complement several, or many; in a clump. Leaf-sheaths without keel. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; truncate. Collar with external ligule. Leaf-blade base symmetrical; with a brief petiole-like connection to sheath; petiole 0.15–0.3 cm long; petiole pubescent. Leaf-blades deciduous at the ligule; linear, or lanceolate; 5–10.5 cm long; 5–15 mm wide. Leaf-blade venation with 4–8 secondary veins; with obscure cross veins. Leaf-blade surface glabrous; hairless except near base.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong; equilateral; 3–7 cm long; 2–4 cm wide. Panicle axis glabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2–4 mm long.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 5–6 mm long; 1.5 mm wide; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1 mm long; 1 length of upper glume; membranous; 1-keeled. Lower glume lateral veins obscure. Lower glume margins ciliolate. Lower glume apex cuspidate. Upper glume ovate; 1 mm long; 0.2 length of adjacent fertile lemma; 1-keeled. Upper glume lateral veins obscure. Upper glume margins ciliolate. Upper glume apex cuspidate.

FLORETS Basal sterile florets similar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret ovate; 0.25 length of fertile lemma; chartaceous; 5 -veined; acute. Lemma of upper sterile floret ovate; 3 mm long; 2 length of lower sterile floret; chartaceous; acute. Fertile lemma lanceolate; 4.5 mm long; coriaceous; purple; without keel; 9 -veined. Lemma apex acute.

FLOWER Lodicules 3. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; apex unappendaged.

DISTRIBUTION South America: Brazil.

NOTES Bambuseae. Fl Cat 1995.

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