Bothriochloa longipaniculata
Bothriochloa hybrida
longspike beardgrass, longspike silver bluestem
hybrid beardgrass, hybrid bluestem
60-150(200) cm tall, 2-4 mm thick, robust;
nodes glabrous or shortly hirsute.
30-80 cm, stiffly erect, moderately branched above the base;
nodes glabrous or puberulent.
cauline, evenly distributed, glabrous, dark green;
ligules 2.5-3 mm;
blades 12-20 cm long, (3)4-7 mm wide, flat to folded.
primarily cauline;
sheaths glabrous, green, sometimes glaucous;
ligules 1-2 mm;
blades 5-25 cm long, 2-5 mm wide, flat to folded, usually ciliate, with long hairs near the base and some hairs on the adaxial surface.
9-20 cm, narrowly lanceolate, silvery-white or light tan;
rachises 7-15 cm, with numerous branches;
branches 3-5 cm, shorter than the rachises, erect, without axillary pulvini, with multiple rames;
rame internodes with a membranous groove wider than the margins, margins copiously hairy, hairs 3-8 mm, at least somewhat obscuring the spikelets.
5-12 cm, lanceolate;
rachises usually shorter than 5 cm;
branches 3-8, without axillary pulvini, lower branches longer than the rachises; at least the lower branches rebranched and with multiple rames;
rame internodes with 5-7 mm marginal hairs.
spikelets (3)3.5-4.5 mm, narrowly ovate to lanceolate, shiny green, apices acute;
lower glumes hirtellous on the lower 1/2, hairs shorter than 0.8 mm, lacking a dorsal pit;
awns 9-14 mm;
anthers 1-2 mm.
spikelets 4.5-6.5 mm, narrowly ovate;
lower glumes 4.5-5.7(6.5) mm, sparsely hairy near the base, with a dorsal pit above the middle;
awns 18-25 mm;
anthers 0.5-1 mm.
spikelets 1.8-2.8 mm, sterile.
spikelets 2.2-3.6 mm, sterile.
= 120.
= 120.
Bothriochloa longipaniculata
Bothriochloa hybrida
Bothriochloa longipaniculata grows at 2-200 m, along roadsides and in fields, open woodlands, disturbed ground, and swales of the Gulf coastal prairie, often in heavy clay soil. Its range extends from southern Texas and Louisiana to northeastern Mexico and possibly Panama.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Bothriochloa hybrida grows in open grasslands, rangeland pastures, disturbed ground, and roadsides, often on calcareous soil, usually at 50-500 m. Its range extends from southern Texas and Louisiana to central Mexico. It resembles B. edwardsiana in some respects, but the latter species has a less robust habit, more predominantly basal foliage, and narrower leaf blades.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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