Poaceae
Chusquea

Chusquea tonduzii Hack.

First published in Oesterr. Bot. Z. 53: 155 (1903)
This species is accepted
The native range of this species is Costa Rica. It is a bamboo and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short, or elongated; pachymorph. Culms arching; 500-2000 cm long; 10-30 mm diam.; woody; without nodal roots. Culm-internodes terete; solid; distally glabrous, or pubescent. Culm-nodes swollen. Lateral branches dendroid; extravaginal. Branch complement many; in a clump; with subequal branches; thinner than stem. Culm-sheaths without auricles. Leaf-sheaths glabrous on surface; outer margin hairy. Ligule an eciliate membrane; 2-5 mm long. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.1-0.3 cm long. Leaf-blades deciduous at the ligule; lanceolate; 9-19 cm long; 9-18 mm wide; light green, or dark green. Leaf-blade venation with distinct cross veins. Leaf-blade surface glabrous, or pubescent; hairy abaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle pubescent above. Panicle open; ovate; 11-19 cm long; 3-8 cm wide. Primary panicle branches spreading; 1-2 -nate; 3-6 cm long. Panicle branches puberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5-4 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; acute, or acuminate; 6-7 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; acute, or acuminate; 6-7 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 ovate; 0.3-1 mm long; 1 length of upper glume; membranous; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume ovate; 0.3-1 mm long; 0.05-0.15 length of adjacent fertile lemma; without keels; 0 -veined. Upper glume primary vein absent. Upper glume lateral veins absent. 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; 3-4 mm long; chartaceous; purple; 3 -veined; acuminate; muticous, or mucronate. Lemma of upper sterile floret ovate; 3.8-5 mm long; chartaceous; emarginate, or truncate. Fertile lemma ovate; 5.6-6.6 mm long; coriaceous; purple; without keel; 5-7 -veined. Lemma apex acuminate. Palea tightly convolute around flower; 1-1.1 length of lemma; 4-7 -veined. Palea keels approximate. Palea apex dentate; 2 -fid.
Morphology Reproductive morphology Flowers
Lodicules 3; membranous; veined; ciliate. Anthers 3; 2.6-3.8 mm long; yellow. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; apex unappendaged.
Distribution
South America: Mesoamericana.
Reference
Bambuseae. Fl Costaric 1994.
[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