Flora of North America species comparison

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Bothriochloa edwardsiana

Edwards Plateau beardgrass, Merrills bluestem
Culms

35-65 cm, slender, stiffly erect, rarely geniculate;

lower nodes shortly hairy, hairs shorter than 3 mm, usually off-white and ascending;

upper nodes glabrous or glabrate.
Leaves

mostly basal, glaucous;

ligules 1-1.5 mm;

blades 10-25 cm long, 1-2(3.5) mm wide, flat to rolled, with 3-7 mm hairs below the middle.
Panicles

6-12 cm, loose, fan-shaped;

rachises shorter than 5 cm, with 3-6 branches;

branches longer than the rachises, not rebranched, with 1 rame;

rame internodes with 3-5 mm marginal hairs.
Sessile

spikelets 5-8 mm, lanceolate;

lower glumes 5.5-7 mm, glabrous, shiny, with a deep dorsal pit, tapering to a narrow, slightly bifid apex;

awns 20-28 mm;

anthers 0.5-1 mm.
Pedicellate

spikelets 2.5-3.5 mm, sterile.
2n

= 60.

Bothriochloa edwardsiana
Distribution
from FNA
TX
[BONAP county map]
Discussion

Bothriochloa edwardsiana grows in the rocky plains and prairies of the Edwards Plateau of Texas, on calcareous soil, at 300-600 m. It also grows in northern Mexico and Uruguay. It resembles B. hybrida in some respects, but that species has a more robust habit, predominantly cauline foliage, and wider leaf blades.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 25, p. 644.
Parent taxa Poaceae > subfam. Panicoideae > tribe Andropogoneae > Bothriochloa
Sibling taxa
B. alta, B. barbinodis, B. bladhii, B. exaristata, B. hybrida, B. ischaemum, B. laguroides, B. longipaniculata, B. pertusa, B. springfieldii, B. wrightii
Name authority (Gould) Parodi
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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