Bouteloua ramosa Scribn. ex Vasey

This species is accepted, and its native range is W. Texas to NE. Mexico.

[GB]
Morphology General Habit
Perennial. Rootstock evident. Culms geniculately ascending; 25-60 cm long; 4-5 -noded. Culm-internodes distally glabrous. Lateral branches ample. Leaf-sheaths mostly shorter than adjacent culm internode. Ligule a fringe of hairs; 0.1-0.2 mm long. Leaf-blades flat, or involute; 2-5 cm long; 1-2 mm wide. Leaf-blade surface pubescent; hairy adaxially. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1-4; single, or borne along a central axis; linear, or oblong; unilateral; 1-3.5 cm long; 4-5 mm wide; bearing 25-45 fertile spikelets on each. Central inflorescence axis 5-8 cm long. Rhachis pubescent on surface; terminating in a sterile spikelet. Spikelet packing broadside to rhachis; crowded. Spikelets pectinate; solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1 mm long.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 2-2.5 mm long; 0.6-0.7 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate; mucronate. Upper glume lanceolate; 3-3.2 mm long; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 0.8-1 mm long.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 4-5 mm long; coriaceous; keeled; 3 -veined. Lemma surface pubescent. Lemma apex lobed; 3 -fid; with central lobe bidentate; awned; 3 -awned. Principal lemma awn from a sinus; 1.5-2 mm long overall. Lateral lemma awns arising on inner edge of lobes; 1-1.2 mm long; subequal to principal. Palea 2.5-4 mm long; 2 -veined. Apical sterile florets 1-2 in number; barren; in a clump; cuneate; 1 mm long. Apical sterile lemmas lobed; 4 -fid; awned; 3 -awned. Apical sterile lemma awns 3-5 mm long.
Morphology Reproductive morphology Flowers
Anthers 3; 1-1.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; obovoid; 2-2.5 mm long; yellow.
Distribution
North America: south-central and Mexico.
Reference
Cynodonteae. Arrieta et al 2006.

Native to:

Mexico Northeast, Texas

Bouteloua ramosa Scribn. ex Vasey appears in other Kew resources:

First published in Bull. Div. Bot. U.S.D.A. 12(1): t. 44 (1890)

Accepted by

  • Powell, A.M. & Worthington, R.D. (2018). Flowering plants of Trans-Pecos Texas and ajacent areas: 1-1444. BRIT Press.

Not accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew. [Cited as Chondrosum brevisetum.]

  • 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 Selected Plant Families 2022. 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 2022. 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