Poaceae
Pseudoeriocoma

Pseudoeriocoma eminens (Cav.) Romasch.

First published in PhytoKeys 126: 113 (2019)
This species is accepted
The native range of this species is S. Arizona to SW. Texas and Mexico. It is a perennial and grows primarily in the desert or dry shrubland 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. Culms erect; slender; 50-120 cm long; wiry. Culm-internodes distally glabrous. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 1.5-6 mm long. Leaf-blades flat, or involute; 20-35 cm long; 1-2(-3) mm wide. Leaf-blade surface pubescent; hairy adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; nodding; 10-20 cm long. Primary panicle branches spreading; 3-4 -nate. Panicle branches capillary; bearded in axils. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 8-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1-1.5 mm long; pubescent; pungent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 8-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1-1.5 mm long; pubescent; pungent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; with lower wider than upper; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 8-15 mm long; 1.1-1.3 length of upper glume; hyaline; much thinner above; without keels; 3-5 -veined. Lower glume apex acuminate. Upper glume lanceolate; 7-12 mm long; 1.5-1.7 length of adjacent fertile lemma; hyaline; much thinner above; without keels; 3-5 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma linear; subterete; 4.5-7 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy all along. Lemma margins convolute; covering most of palea. Lemma apex awned; 1 -awned. Principal lemma awn bigeniculate; 35-60 mm long overall; with twisted column. Column of lemma awn glabrous. Palea 2 -veined; without keels.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3. Stigmas 2. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum linear.
Distribution
North America: southwest USA, south-central USA, and Mexico.
Reference
Stipeae. Gr Texas 1994.
[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

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • 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 2025. 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 2025. 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