Poaceae
Chusquea

Chusquea perotensis L.G.Clark, G.Cortes & Cházaro

First published in Syst. Bot. 22: 225 (1997)
This species is accepted
The native range of this species is Mexico (Veracruz, Oaxaca). It is a bamboo and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Perennial. Rhizomes short; pachymorph. Culms arching; 600-1500 cm long; 15-50 mm diam.; woody. Culm-internodes terete; thin-walled; 19-32 cm long; distally glabrous. Lateral branches dendroid; intravaginal. Bud complement 40-50. Branch complement many; girdling the culm; thinner than stem. Culm-sheaths persistent; 6.8-12.6 cm long; 0.5 length of internode; hairy on margins. Culm-sheath ligule 1 mm high; ciliate. Culm-sheath blade triangular; indistinctly demarcated from sheath; erect; 2.8-4.2 cm long; with ciliate margins; mucronate. Leaves 4-9 per branch. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs ciliate; 1-1.8 mm long. Ligule an eciliate membrane; 1-3(-7) mm long; glabrous on abaxial surface, or pubescent on abaxial surface. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2-0.3 cm long; petiole glabrous. Leaf-blades lanceolate; 10-17 cm long; 8-15 mm wide. Leaf-blade venation without cross veins, or with obscure cross veins. Leaf-blade surface glabrous. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; bracteate at branch bases. Peduncle 3-9.5 cm long; pubescent above. Panicle open; ovate; 7-12 cm long. Primary panicle branches spreading, or reflexed; 2.5-12 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3-8 mm long; scabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; subterete; 7.4-8.7 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 oblong; subterete; 7.4-8.7 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume oblate; 0.4-0.8 mm long; 0.05 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume ovate; 0.7-1.3 mm long; 0.1 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret ovate; 3.6-4.5 mm long; 0.5-0.6 length of fertile lemma; chartaceous; 3(-7) -veined; scabrous; rough on midvein; acute. Lemma of upper sterile floret ovate; 4.3-5 mm long; chartaceous; acute. Fertile lemma ovate; 7-7.8 mm long; coriaceous; without keel; 7(-9) -veined. Lemma midvein scabrous. Lemma surface pilose; hairy above. Lemma apex acute; mucronate. Palea 6.9-8.1 mm long; 4 -veined. Palea surface scabrous.
Morphology Reproductive morphology Flowers
Lodicules 3; 1.5 mm long; membranous; veined; ciliate. Anthers 3; 5.4-6 mm long; yellow. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; oblong; 5-5.2 mm long; apex unappendaged. Embryo 0.2 length of caryopsis. Hilum linear.
Distribution
North America: Mexico.
Reference
Bambuseae. Clark 2001.
[GB]

Sources

  • GrassBase - The Online World Grass Flora

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

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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