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 montana

HABIT Perennial. Culms erect, or leaning; 200–300 cm long; woody; without nodal roots. Culm-internodes terete; solid; smooth. Culm-nodes swollen. Lateral branches dendroid. Branch complement several; in a clump; with 1 branch dominant; thinner than stem. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs pubescent. Ligule an eciliate membrane; 2–4 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole glabrous. Leaf-blades deciduous at the ligule; lanceolate; 8–13 cm long; 6–10 mm wide; herbaceous. Leaf-blade venation without cross veins. Leaf-blade surface glabrous. Leaf-blade margins cartilaginous; scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 14–20 cm long. Primary panicle branches 5–13 cm long. Panicle axis pubescent.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 6–7 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.5–0.6 mm long; 0.75 length of upper glume; membranous; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume ovate; 0.6–0.7 mm long; 0.1 length of adjacent fertile lemma; without keels; 0 -veined. Upper glume primary vein absent. Upper glume lateral veins absent. Upper glume apex obtuse.

FLORETS Basal sterile florets similar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret ovate; 3–3.5 mm long; 0.5 length of fertile lemma; chartaceous; 3 -veined; pubescent; acute. Lemma of upper sterile floret ovate; 3.5–4.5 mm long; 1.2–1.3 length of lower sterile floret; chartaceous; pubescent; acute. Fertile lemma ovate; 6 mm long; coriaceous; without keel; 7 -veined. Lemma surface pubescent; hairy above. Lemma apex acuminate. Palea 1 length of lemma; 4 -veined. Palea surface pubescent.

FLOWER Lodicules 3; membranous; veined; ciliate. Anthers 3; 4 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; 5.5–6.5 mm long; apex unappendaged. Hilum linear; 1 length of caryopsis.

DISTRIBUTION South America: southern South America.

NOTES Bambuseae. Fl Pat 1995.

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