Flora of North America species comparison

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Bromus arenarius

Australian brome, Australian chess
Habit Plants annual.
Culms

20-40 cm, erect to ascending.
Sheaths

densely retorsely pilose;

ligules 1.5-2.5 mm, glabrous or pilose, obtuse, lacerate;

blades 7-8 cm long, 3-6 mm wide, pilose on both surfaces.
Panicles

(4)10-15 cm long, 4-7 cm wide, open, nodding;

branches sometimes longer than the spikelets, spreading or ascending, sinuous.
Spikelets

10-20 mm, lanceolate, terete to moderately laterally compressed;

florets 5-9(11), bases concealed at maturity;

rachilla internodes concealed at maturity.
Glumes

densely pilose;

lower glumes 7-10 mm, 3-veined;

upper glumes 8-12 mm, (5)7-veined;

lemmas 9-11(13) mm long, 1-1.8 mm wide, lanceolate, densely pilose, distinctly 7-veined, rounded over the midvein, margins rounded, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 10-16 mm, straight to weakly spreading, arising 1.5 mm or more below the lemma apices;

anthers 0.7-1 mm.
Caryopses

equaling or shorter than the paleas, thin, weakly inrolled.
2n

= unknown.

Bromus arenarius
Distribution
from FNA
AZ; CA; NV; OR; PA
[WildflowerSearch map]
[BONAP county map]
Discussion

Bromus arenarius grows in dry, often sandy slopes, fields, and waste places. Native to Australia, it is now widely scattered throughout California, and is also recorded from Oregon, eastern Nevada, Arizona, New Mexico, Texas, and Pennsylvania.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 24, p. 235.
Parent taxa Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromus
Sibling taxa
B. aleutensis, B. anomalus, 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. grandis, 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
Name authority Labill.
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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