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nodding brome, Porter brome, Porter's brome

brome dresse, erect brome, meadow brome, upright brome

Habit Plants perennial; not rhizomatous. Plants perennial; not rhizomatous.
Culms

30-100 cm, erect;

nodes (2)3-4(5), glabrous or pubescent;

internodes mostly glabrous, puberulent near the nodes.

50-100 cm, erect;

nodes (1)2-3, usually glabrous, rarely pubescent;

internodes usually glabrous, rarely pubescent.

Sheaths

glabrous or pilose, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles absent;

ligules to 2.5 mm, glabrous, truncate or obtuse, erose or lacerate;

blades (3)10-25(35) cm long, 2-5(6) mm wide, flat, not glaucous, both surfaces usually glabrous, sometimes the adaxial surface pilose.

glabrous or pilose;

auricles absent;

ligules to 1.5 mm, glabrous, truncate, lacerate;

blades 10-20 cm long, 2-6 mm wide, often involute or folded, glabrous or sparingly hairy.

Panicles

7-20 cm, open, nodding, often 1-sided;

branches slender, ascending to spreading, often recurved and flexuous.

10-20 cm, erect, contracted;

branches erect or ascending.

Spikelets

12-38 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (3)5-11(13) florets.

15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 5-8(12) florets.

Glumes

usually pubescent, rarely glabrous;

lower glumes 5-7(9) mm, usually 3-veined, sometimes 1-veined;

upper glumes 6-10 mm, 3-veined, not mucronate;

lemmas 8-14 mm, elliptic, rounded over the midvein, usually pubescent or pilose, margins often with longer hairs, backs and margins rarely glabrous, apices acute or obtuse to truncate, entire;

awns (1)2-3(3.5) mm, straight, arising less than 1.5 mm below the lemma apices;

anthers (1)2-3 mm.

glabrous;

lower glumes 7-9 mm, 1-veined;

upper glumes 9-11 mm, 3-veined;

lemmas 10-13(15) mm, lanceolate, rounded over the midvein, backs and margins glabrous or sparsely pubescent, apices subulate to acute, entire;

awns 5-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 4-6.5 mm.

2n

= 14.

= 56.

Bromus porteri

Bromus erectus

Distribution
from FNA
AZ; CA; CO; ID; MT; ND; NE; NM; NV; SD; TX; UT; WY; MB; SK
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; CA; CT; DC; ID; IL; KY; MA; ME; MI; ND; NY; OH; OR; VA; VT; WA; WI; WV; AB; NS; ON; QC
[BONAP county map]
Discussion

Bromus porteri grows in montane meadows, grassy slopes, mesic steppes, forest edges, and open forest habitats, at 500-3500 m. It is found from British Columbia to Manitoba, and south to California, western Texas, and Mexico. It is closely related to B. anomalus, and has often been included in that species. It differs chiefly in its lack of auricles, and in having culm leaves with midribs that are not narrowed just below the collar.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Bromus erectus is native to Europe. In the Flora region, it grows on disturbed soils, often over limestone. It is established in the eastern United States and Canada, and has been reported from other locations where it has not persisted.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 24, p. 213. FNA vol. 24, p. 218.
Parent taxa Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis 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. 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. 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
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. 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
Synonyms Bromopsis ported
Name authority (J.M. Coult.) Nash Huds.
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