Poaceae
Guadua

Guadua velutina Londoño & L.G.Clark

First published in Nordic J. Bot. 11: 328 (1991)
This species is accepted
The native range of this species is Mexico (Tamaulipas to Tabasco). It is a bamboo and grows primarily in the seasonally dry tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 300-500 cm long; 50-100 mm diam.; woody. Culm-internodes terete; thick-walled; mid-green; distally glabrous. Lateral branches dendroid. Culm-sheaths hispid; auriculate; with 10-40 mm high auricles; setose on shoulders; shoulders with 5-10 mm long hairs. Culm-sheath blade lanceolate; 11-17 cm long; pubescent. Leaf-sheaths pubescent. Leaf-sheath oral hairs setose; 5-10 mm long. Leaf-sheath auricles absent. Ligule an eciliate membrane; 0.3-0.5 mm long. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear, or lanceolate; 10-20 cm long; 11-22 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Synflorescence bractiferous; clustered at the nodes; in untidy tufts; lax; with glumaceous subtending bracts; prophyllate below lateral spikelets; leafy between clusters. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-8 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 50-70 mm long; 3-5 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 4-8 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 50-70 mm long; 3-5 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes several; 4-7 empty glumes; persistent; shorter than spikelet. Upper glume ovate; 4-15 mm long.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 12-15 mm long; coriaceous; without keel; 25-30 -veined. Lemma surface pubescent. Lemma apex apiculate. Palea 8-13 mm long. Palea keels winged; conspicuously winged; ciliate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 3. Anthers 6; 5-9 mm long. Stigmas 3. Ovary umbonate.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
North America: Mexico.
Reference
Bambuseae. Fl Meso-Am 1997.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 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 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0