Chusquea asymmetrica (L.G.Clark) L.G.Clark

First published in Syst. Bot. 34: 680 (2009)
This species is accepted
The native range of this species is Ecuador to Bolivia. It is a bamboo and grows primarily in the montane tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; reed-like; 200-250 cm long; 5-7 mm diam.; woody. Culm-internodes terete. Lateral branches lacking. Leaf-sheaths with infolded margins; striately veined; glabrous on surface; outer margin glabrous, or hairy. Leaf-sheath auricles erect (on one side). Ligule a ciliate membrane; 6-8 mm long; pubescent on abaxial surface. Leaf-blade base with a false petiole; petiole 1.5-17.5 cm long; petiole glabrous. Leaf-blades deciduous at the ligule; linear, or lanceolate; 27-85 cm long; 15-33 mm wide; coriaceous; stiff. Leaf-blade midrib conspicuous (and eccentric); keeled beneath. Leaf-blade venation with obscure cross veins. Leaf-blade surface glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; subtended by bracts (1 bract 0.5mm long). Peduncle 7-21 cm long; glabrous. Panicle open; ovate, or pyramidal; 21-47 cm long; 7-10 cm wide. Primary panicle branches 8-21 cm long. Panicle axis glabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1-3 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; compressed slightly; 3.6-4.4 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; compressed slightly; 3.6-4.4 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet, or reaching apex of florets. Lower glume lanceolate; 1.3-4.1 mm long; 0.4-0.9 length of upper glume; coriaceous; without keels; 0-1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface smooth, or scabrous; inner surface pubescent. Lower glume apex acuminate; mucronate, or awned; 1 -awned. Lower glume awn 1.4-1.6 mm long. Upper glume ovate; 3-4.4 mm long; 0.6-1.1 length of adjacent fertile lemma; coriaceous; without keels; 1-3 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent, or obscure. Upper glume surface smooth, or scabrous; inner surface pubescent. Upper glume apex attenuate; muticous, or awned; 1 -awned. Upper glume awn 1-2.4 mm long.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets similar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret ovate; 2.4-3.5 mm long; coriaceous; 3 -veined; pubescent; hairy at apex; acuminate; muticous, or mucronate. Lemma of upper sterile floret ovate; 2.6-3.3 mm long; coriaceous; smooth, or scabrous (at top); muticous, or mucronate. Fertile lemma ovate; 3.2-3.7 mm long; coriaceous; without keel; 5 -veined. Lemma surface smooth, or scaberulous; rough above; inner surface pubescent. Lemma apex acute; mucronate. Palea 3-3.7 mm long; 1 length of lemma; coriaceous; 2-4 -veined; without keels. Palea surface smooth, or scaberulous (at top). Palea apex with excurrent keel veins.
Morphology Reproductive morphology Flowers
Lodicules 3; 0.7-0.9 mm long; glabrous. Anthers 3; 1.5-2 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
South America: western South America.
Reference
Bambuseae. Clarke 2001.
[GB]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/45959/11020946

Conservation
VU - vulnerable
[IUCN]

Sources

  • GrassBase - The Online World Grass Flora

    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0