Chusquea argentina Parodi

First published in Revista Argent. Agron. 8: 339 (1941)
This species is accepted
The native range of this species is S. Central & S. Chile to SW. Argentina. It is a bamboo and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial. Culms leaning; 300 cm long; woody; without nodal roots. Culm-internodes terete. Lateral branches dendroid. Branch complement several. Leaves 10-12 per branch. Leaf-sheaths longer than adjacent culm internode. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 1.2-3 mm long; pubescent on abaxial surface. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades deciduous at the ligule; lanceolate; 6-13 cm long; 5-10 mm wide; herbaceous. Leaf-blade midrib indistinct. Leaf-blade venation with obscure cross veins. Leaf-blade surface pilose; sparsely hairy; hairy adaxially. Leaf-blade apex acute; filiform.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; ovate; 5-6.5 cm long; 1-1.5 cm wide. Panicle axis pubescent. Panicle branches pubescent. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2-3 mm long; pubescent.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 7-9 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; 7-9 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume oblong; 1 mm long; 0.5 length of upper glume; membranous; much thinner on margins; without keels; 0-1 -veined. Lower glume lateral veins absent. Lower glume surface pubescent. Lower glume apex obtuse. Upper glume oblong; 1.8-2 mm long; 0.25 length of adjacent fertile lemma; membranous; with scarious margins; without keels; 0-1 -veined. Upper glume primary vein absent, or obscure. Upper glume lateral veins absent. Upper glume surface pubescent. 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; 4.5-5.5 mm long; 0.66 length of fertile lemma; chartaceous; 1 -veined; without lateral veins; pubescent; hairy above; acute. Lemma of upper sterile floret ovate; 4.6-5.6 mm long; 1 length of lower sterile floret; chartaceous; pubescent; acute. Fertile lemma ovate; 7-7.5 mm long; coriaceous; without keel; 7 -veined. Lemma surface puberulous; hairy above. Lemma apex acuminate. Palea surface pubescent; hairy on back; hairy above.
Morphology Reproductive morphology Flowers
Lodicules 3; lanceolate; ciliate. Anthers 3; 4 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
South America: southern South America.
Reference
Bambuseae. Fl Pat 2010.
[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