Difference between revisions of "Bouteloua hirsuta subsp. pectinata"
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Latest revision as of 18:59, 11 May 2021
Plants without rhizomes or stolons. Culms 35-75 cm, erect, densely tufted, usually unbranched; nodes 3-4; internodes glabrous. Leaves mostly basal; sheaths mostly pubescent. Panicles racemose, with (2)3-6 branches on (3)6-18 cm rachises. Anthers 2-3.2 mm; rachilla segments subtending second florets with a distal tuft of hairs. Caryopses 1.5-2.6 mm. 2n = 20.
Discussion
Bouteloua hirsuta subsp. pectinata grows in well-drained, relatively undisturbed, calcareous soils, usually on thin-soiled limestone outcrops, at 60-500 m. Its range extends from southern Oklahoma to central Texas. Although restricted in its geographic distribution, where subsp. pectinata is sympatric with subsp. hirsuta, swarms of morphologically intermediate plants are found (Wipff and Jones 1996).
Selected References
None.