Anuales cespitosas. Tallos 10-100 cm. Hojas glabras o pelosas; lígula 1-3 mm; láminas hasta 30 cm x 4-7 mm. Panícula 5-30 cm. Espiguillas 2-3 cm; gluma inferior 7-8 mm, 5-7-nervia; gluma superior 8-10 mm, 9-nervia; flósculos 6-12; lemas 11-17 mm, carinado-comprimidas, 9-13-nervias, glabras o escabrosas, el ápice diminutamente denticulado, la arista hasta 1 mm. 2n=42. Áreas abiertas. G (de Koninck, s.n., ISC); CR (Weston et al. 3377, ISC); P (Galdames et al. 2943, MO) . 1200-2200 m. (S. Estados Unidos, México, Mesoamérica, Sudamérica.)
Annual. Culms erect or geniculately ascending, 60–100 cm tall, ca. 5 mm in diam. Leaf sheaths pubescent; leaf blades 30–40 cm × 4–6 mm, scattered pubescent; ligule ca. 2 mm. Panicle lax, oblong in outline, 10–40 cm; branches ca. 10 cm, scabrid, each bearing 1–3 spikelets. Spikelets ovate-oblong, laterally compressed, 15–30 × 8–10 mm, florets 6–11, overlapping; rachilla internodes not visible, ca. 2 mm, scabrid; glumes narrowly lanceolate, lower glume 10–12 mm, upper glume slightly longer than lower glume; lemmas 15–20 mm, keeled, 11-veined, veins scabrid, apex mucronate; palea narrow, ca. 1/2 as long as lemma, keels ciliate. Anthers 0.3–0.6 mm. Fl. May, fr. Sep. 2n = 28, 42, 58.
Plantas hasta ca. 95 cm. Hojas con lígula 1.5–3 mm; lámina9–28(–31) cm × 3–7 mm, glabra a pubescente. Infl. 5–26 cm,abierta y algo pendulosa. Espiguillas 19–28(–31) mm; glumainferior 5–7-nervada, la superior 8–11 mm, 9-nervada; lemas10–17 mm, 9–13-nervadas.
"Stout annual or short-lived perennial to 1 m; blades flat and broad, 3-12 mm wide; ligule 2.5-5 mm; panicles 10-30 cm, loosely contracted; spikelets (16-)20-30(-35) mm, 4-12-fld, strongly compressed; glumes lanceolate, acuminate, strongly keeled, the first 8-11.5 mm, 3-veined, the second 9-13 mm, 5-veined; lemmas 12-20 mm, keeled, closely overlapping, glabrous (at least below) between the 11-13 long-ciliate veins; awns to 2.5 mm, or none; palea half as long as the lemma; 2n=28, 42, 56. Native of S. Amer., widely cult. for forage in warm regions, and occasionally intr. or escaped in the s. part of our range, n. to N.Y. and Mo. (B. unioloides; B. willdenowii)"
Tufted, short-lived perennial or annual 150-1000 mm high; culms erect to decumbent. Leaf blade to 400 x 8 mm. Inflorescence open, flexuous; pedicels mostly longer than spikelets. Spikelet (15) 20-35 x 5-8 mm, strongly laterally compressed; glumes and lemmas prominently keeled; lower glume 3-7(9)-nerved; upper glume 5-9(11)-nerved; lemma 15-25 mm long, minutely bifid, lobes shorter than 1 mm, apex acuminate, 9-11-nerved, awnless or awn 0.5-5.0 mm long; palea much shorter than lemma, keels ciliate; callus scar circular; anthers 0.5-1.0 mm long in cleistogamous florets, 1-5 mm long in chasmogamous florets.
Short-lived perennial or annual, tufted, up to 1 m high. Leaf blades 5-8 mm wide. Spikelets 20-35 mm long, 5-8 mm wide. Panicle lax, pedicels longer than spikelets; spikelets compressed; glumes and lemmas prominently keeled, acute; glumes 3-9-nerved; lemmas 15-25 mm long, minutely bifid, lobes shorter than 0.5 mm, awns shorter than 3 mm.
Like B. commutatus but spikelets laterally compressed, glumes and lemmas sharply keeled, lemma awns to 3 mm long.
Annual or short-lived perennial; up to 1 m high; tufted. Leaf blades up to 400 x 8 mm. Flowers: panicle lax; pedicels longer than spikelets; spikelets 20-35 x 5-8 mm; strongly laterally compressed; glumes and lemmas prominently keeled; acute; glumes 3-9-nerved; lemmas 15-25 mm long; keeled; minutely bifid; lobes < 0.5 mm long; awns < 3 mm long; anthers 0.5-1.0 mm long in cleistogamous florets; 2-5 mm long in chasmogamous florets.
Usually in moist to wet places, often in shade; disturbed places and natural veld.
Usually in moist to wet places, often in shade, in disturbed and natural veld.
Dry Grassland; Mesic Grassland; Dwarf Karroid Shrubland; Vredefort Dome Savanna. Moist to wet places; often in shade; in disturbed and natural veld.
Naturalised from South and Central America, now worldwide. N, L, S, LIM, NW, G, M, FS, KZN, NC, WC, EC.
Different strains from Europe, Australia and America.