Poaceae
Chusquea

Chusquea deficiens Parodi

First published in Revista Argent. Agron. 8: 335 (1941)
This species is accepted
The native range of this species is Central Bolivia to Argentina (Jujuy, Salta). It is a bamboo and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Perennial. Rhizomes short; pachymorph. Culms leaning; 300-400 cm long; 7-8 mm diam.; woody. Culm-internodes terete; solid; 10-25 cm long; distally glabrous. Lateral branches dendroid. Branch complement several; in a clump; with 1 branch dominant; thinner than stem. Leaves 2-3 per branch. Leaf-sheaths outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 1 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.1-0.2 cm long; petiole pilose. Leaf-blades lanceolate; 4-9 cm long; 4-8 mm wide. Leaf-blade venation without cross veins. Leaf-blade surface scabrous; rough adaxially; glabrous, or puberulous; hairy abaxially. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; exserted, or embraced at base by subtending leaf. Panicle open; pyramidal; 5-7 cm long. Panicle axis puberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2-4 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 11-12 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; 11-12 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes both absent or obscure, or two; persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.2 mm long; 1 length of upper glume; hyaline; without keels. Lower glume apex obtuse. Upper glume ovate; 0.2 mm long; 0.02 length of adjacent fertile lemma; without keels. Upper glume apex obtuse.
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; 5.5-6 mm long; 0.5 length of fertile lemma; chartaceous; 3 -veined; puberulous; hairy above; acuminate; awned. Awn of lower sterile floret 1-2 mm long. Lemma of upper sterile floret ovate; 5.5-6 mm long; 1 length of lower sterile floret; chartaceous; pubescent; acuminate; awned. Awn of upper sterile floret 1-2 mm long. Fertile lemma lanceolate; 10 mm long; coriaceous; without keel; 7-9 -veined. Lemma surface puberulous; hairy above. Lemma apex acuminate; mucronate, or awned; 1 -awned. Principal lemma awn 0.5-1 mm long overall. Palea 4-6 -veined. Palea apex with excurrent keel veins.
Morphology Reproductive morphology Flowers
Lodicules 3; membranous; veined; ciliate. Anthers 3; 4-5 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; apex unappendaged.
Distribution
South America: southern South America.
Reference
Bambuseae. Parodi 1996.
[GB]

Sources

  • GrassBase - The Online World Grass Flora

    • 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