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

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

  • 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 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