Poaceae
Poa

Poa sanchez-vegae Soreng & P.M.Peterson

First published in PhytoKeys 63: 118 (2016)
This species is accepted
The native range of this species is Peru (Cajamarca). It is a perennial and grows primarily in the montane 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: threatened. Confidence: confident
[AERP]

Morphology General Habit
Perennial; caespitose. Basal innovations extravaginal. Culms geniculately ascending; 14-24 cm long. Culm-internodes 0.3-1.3 cm long. Leaf-sheaths longer than adjacent culm internode; keeled. Ligule an eciliate membrane; 2-3 mm long; erose, or lacerate. Leaf-blades flat, or involute; 3-7 cm long; 0.2-1.2 mm wide; 1.6 cm long at summit of culm. Leaf-blade apex hooded.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; comprising 5-10 fertile spikelets. Panicle open; linear; 1.7-2.5 cm long. Primary panicle branches appressed; simple; bearing 2 fertile spikelets on each lower branch. Panicle branches flexuous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 3 fertile florets; with a barren rhachilla extension. Spikelets oblong, or cuneate; laterally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.2-2 mm long.
Fertile
Spikelets comprising 3 fertile florets; with a barren rhachilla extension. Spikelets oblong, or cuneate; laterally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.2-2 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes two; persistent; similar; shorter than spikelet. Lower glume linear; 1-2 mm long; 1 length of upper glume; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 1-2 mm long; 0.25-0.33 length of adjacent fertile lemma; 3(-4) -veined. Upper glume apex entire, or dentate; 2 -fid; acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 2.2-3.5 mm long; herbaceous; keeled; 3-5 -veined. Lemma apex dentate; 3 -fid; with lobes 0.1-0.3 mm long. Palea 2-3.2 mm long. Palea keels scabrous. Palea apex dentate; 2 -fid.
Morphology Reproductive morphology Flowers
Lodicules 2; lanceolate; 0.7-0.8 mm long. Anthers 3; 2-2.9 mm long; yellow. Ovary glabrous.
Distribution
South America: western South America.
Reference
Poeae. Sanchez Vega et al 2009.
[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

  • 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