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 purdieana

HABIT Perennial. Culms woody. Culm-internodes terete; solid. Lateral branches dendroid. Branch complement many; in a clump; thinner than stem. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.5 mm long. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 2–7 cm long; 2–7 mm wide. Leaf-blade venation prominent; with 4 secondary veins; without cross veins. Leaf-blade surface glabrous. Leaf-blade apex attenuate; filiform.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted, or spiciform; linear; 5–10 cm long. Panicle axis scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 10 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1–1.5 mm long; membranous; without keels. Lower glume surface puberulous. Lower glume apex obtuse. Upper glume ovate; 1.5–2 mm long; 0.1–0.2 length of adjacent fertile lemma; membranous; without keels. Upper glume surface puberulous. Upper glume apex obtuse.

FLORETS Basal sterile florets barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret lanceolate; 7 mm long; 0.66 length of fertile lemma; chartaceous; 5–7 -veined; setaceously attenuate. Lemma of upper sterile floret lanceolate; 7 mm long; chartaceous; acute; awned. Awn of upper sterile floret 2 mm long. Fertile lemma lanceolate; 10 mm long; coriaceous; without keel; 7–9 -veined. Lemma apex acute; awned; 1 -awned. Principal lemma awn 2–3 mm long overall. Palea apex awned; awns 1 mm long.

FLOWER Lodicules 3; membranous; veined. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; apex unappendaged.

DISTRIBUTION South America: northern South America and western South America.

NOTES Bambuseae. Munro 2001.

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