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 diversiglumis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 100 cm long. Lateral branches lacking. Leaf-sheaths longer than adjacent culm internode. Leaf-sheath oral hairs ciliate; 5 mm long. Leaf-sheath auricles erect. Ligule a ciliolate membrane. Leaf-blade base with a false petiole. Leaf-blades persistent; lanceolate; 25–50 cm long; 20–35 mm wide; coriaceous. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; pyramidal; 15–34 cm long; 2–4 cm wide; contracted about primary branches. Primary panicle branches ascending; 1 -nate; 2–4 cm long; bearing spikelets almost to the base. Panicle axis pilose. Panicle branches with prominent pulvini.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1 mm long.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 5–5.5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; shorter than spikelet. Lower glume ovate; 1.7–1.9 mm long; coriaceous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume inner surface pubescent. Lower glume apex acute; awned; 1 -awned. Lower glume awn 0.5 mm long. Upper glume ovate; 1.6–2.2 mm long; coriaceous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume inner surface pubescent. Upper glume apex obtuse; awned; 1 -awned. Upper glume awn 0.5 mm long.

FLORETS Basal sterile florets similar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret oblong; 3.8 mm long; coriaceous; 4 -veined; ciliate on margins; awned. Awn of lower sterile floret 0.5 mm long. Lemma of upper sterile floret ovate; 4.4 mm long; ciliolate on margins; awned. Awn of upper sterile floret 0.5–0.6 mm long. Fertile lemma ovate; 5 mm long; coriaceous; without keel; 3 -veined. Lemma lateral veins transversely connected at apex. Lemma margins ciliate; hairy above. Lemma apex acute; awned; 1 -awned. Principal lemma awn 0.5 mm long overall. Palea lanceolate; 3.7 mm long; coriaceous; 2 -veined; without keels.

FLOWER Lodicules 3; 1 mm long; veined; ciliate. Anthers 3; 1.7–1.8 mm long. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: northern South America and Brazil.

NOTES Bambuseae. Soderstrom 1996.

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