Poaceae
Aristida

Aristida chapadensis Trin.

First published in Bull. Sci. Acad. Imp. Sci. Saint-Pétersbourg 1: 68 (1836)
This species is accepted
The native range of this species is Brazil. It is a perennial 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. Culms 90-106 cm long. Lateral branches lacking. Leaf-sheath oral hairs scanty, or bearded (sparsely). Ligule a ciliolate membrane; 0.2 mm long. Collar glabrous. Leaf-blades straight; flat, or convolute (sometimes upper); 20-50(-60) cm long; 4-7 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous. Leaf-blade apex acute; antrorsely scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; 30-40 cm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets subterete; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; straight; 1.5-1.8 mm long; bearded; acute.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets subterete; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; straight; 1.5-1.8 mm long; bearded; acute.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; dissimilar (lower longer than upper). Lower glume lanceolate; (16-)17-19(-22) mm long; 1 -veined. Lower glume primary vein scaberulous. Lower glume surface asperulous; rough generally. Lower glume apex setaceously attenuate. Upper glume lanceolate; 14-16(-19) mm long; 1 -veined. Upper glume surface smooth. Upper glume apex entire; setaceously attenuate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma subterete; 8-10 mm long; without keel; rounded throughout; 3 -veined. Lemma surface scaberulous; rough above; with a median groove (ventral,longitudinal). Lemma margins involute. Lemma apex awned; 3 -awned. Principal lemma awn straight; ascending; simple at base; with (35-)45-56 mm long limb; with twisted column. Column of lemma awn (13-)16-25 mm long. Lateral lemma awns ascending; 28-46 mm long; shorter than principal.
Distribution
South America: Brazil.
Reference
Aristideae. LO-W 1993.
[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

    • 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 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