Flora of North America species comparison

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Bromus grandis

tall brome
Habit Plants perennial; not rhizomatous.
Culms

70-180 cm, erect;

nodes 3-7, pubescent or puberulent;

internodes pubescent, puberulent, or glabrous.
Sheaths

densely pubescent, hairs to 1 mm, collars with hairs to 2 mm, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles sometimes present;

ligules 1-3 mm, densely pubescent to pilose, obtuse, lacerate;

blades (13)18-38 cm long, 3-12 mm wide, flat, sparsely to densely pubescent on both surfaces.
Panicles

14-27 cm long, very open, nodding;

branches flexuous, usually widely spreading, with spikelets near the tips.
Spikelets

20-37(45) mm, elliptic to lanceolate, terete to moderately laterally compressed, with 4-9(10) florets.
Glumes

pubescent, with prominent veins, margins not bronze-tinged;

lower glumes 4-8.5 mm, (1)3-veined;

upper glumes 7-10 mm, 3(5)-veined, not mucronate;

lemmas 9.5-14 mm, lanceolate, rounded over the midvein, backs pilose, pubescent, or glabrous, margins pilose, not bronze-tinged, apices subulate to acute, entire;

awns 3-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3-6 mm.
2n

= 14.

Bromus grandis
Distribution
from FNA
CA
[BONAP county map]
Discussion

Bromus grandis grows on dry, wooded or open slopes, at elevations of 350-2500 m. Its range extends from central California into Baja California, Mexico.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 24, p. 213.
Parent taxa Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis
Sibling taxa
B. aleutensis, B. anomalus, B. arenarius, B. arizonicus, B. arvensis, B. berteroanus, B. briziformis, B. carinatus, B. caroli-henrici, B. catharticus, B. ciliatus, B. commutatus, B. danthoniae, B. diandrus, B. erectus, B. frondosus, B. hallii, B. hordeaceus, B. inermis, B. japonicus, B. kalmii, B. laevipes, B. lanatipes, B. lanceolatus, B. latiglumis, B. lepidus, B. madritensis, B. maritimus, B. mucroglumis, B. nottowayanus, B. orcuttianus, B. pacificus, B. polyanthus, B. porteri, B. pseudolaevipes, B. pubescens, B. pumpellianus, B. racemosus, B. ramosus, B. richardsonii, B. riparius, B. rubens, B. scoparius, B. secalinus, B. sitchensis, B. squarrosus, B. sterilis, B. suksdorfii, B. tectorum, B. texensis, B. vulgaris
Synonyms B. orcuttianus var. grandis
Name authority (Shear) Hitchc.
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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