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This species is accepted, and its native range is Peru.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial; caespitose; clumped loosely. Cataphylls evident. Rhizomes short. Basal innovations extravaginal. Culms erect; (30-)50-120 cm long. Culm-internodes distally pilose. Lateral branches lacking. Leaf-sheaths tubular for much of their length; with 0.66-0.75 of their length closed; 8-10 cm long; pilose; with reflexed hairs; outer margin glabrous. Ligule an eciliate membrane; 3-6.6 mm long; pilose on abaxial surface; erose; obtuse. Leaf-blades 20-55 cm long; 3-8 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy abaxially, or on both sides. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; obovate; loose; equilateral, or nodding; 12-26 cm long; 1-8 cm wide. Primary panicle branches ascending, or spreading, or drooping; 2-4 -nate; 1.5-10 cm long. Panicle axis scabrous; with scattered hairs, or glabrous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; compressed strongly; (12-)18-27 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-3 mm long.
Fertile
Spikelets comprising 4-7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; compressed strongly; (12-)18-27 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-3 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet. Lower glume lanceolate; 5-8 mm long; 0.66 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface glabrous, or pilose. Lower glume apex obtuse. Upper glume lanceolate; 8-11.2 mm long; 0.8-0.9 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume surface glabrous, or pilose. Upper glume apex acute; muticous, or mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 10-12.6 mm long; chartaceous; keeled; 5-7 -veined. Lemma surface pubescent. Lemma hairs 0.2-0.5 mm long. Lemma apex entire, or dentate; 2 -fid; with lobes 0.2 mm long; awned; 1 -awned. Principal lemma awn apical, or from a sinus; 3-5.5 mm long overall. Palea 9-12 mm long. Palea keels ciliate. Palea apex with excurrent keel veins. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; elliptic, or obovate; 1-1.3 mm long; membranous. Anthers 3; 3.1-3.8 mm long; yellow, or orange. Ovary with a fleshy appendage above style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; oblanceolate; 5.8-7 mm long; hairy at apex; apex fleshy. Hilum linear; 1 length of caryopsis.
Distribution
South America: western South America.
Reference
Bromeae. Saarela et al 2007.

Native to:

Peru

Bromus ayacuchensis Saarela & P.M.Peterson appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Peterson, P.M. [16452], Peru K000975260 isotype

First published in Sida 22: 919 (2006)

Accepted by

  • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

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 Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0