Lycurus setosus

(Nutt.) C. Reeder
Common names: Bristly wolfstail
Treatment appears in FNA Volume 25. Treatment on page 202.

Plants densely cespitose. Culms 30-50 (60) cm, erect, with several nodes, sparingly branched, scabrous to puberulent at or near the nodes. Ligules (2) 3-10 (12) mm, hyaline, acuminate, sometimes shortly cleft on the sides (in dried specimens the fragile ligules may appear shorter because of the folded tip); blades 4-9 (13) cm long, 1-2 mm wide, glabrous, smooth or scabridulous abaxially, scabridulous or hispidulous adaxially, with prominent whitish midribs and scabrous margins, midribs extending as fragile, easily broken, awnlike, (3) 4-7 (12) mm apices. Panicles 4-8 (10) cm long, (5) 7-8 mm wide; shorter pedicels 0.8-1 (1.5) mm; longer pedicels 1-2 mm. Spikelets 3-4 mm. Glumes 1-1.5 (2) mm, scabrous apically; lower glumes 2-veined, with (1) 2 (3) unequal scabridulous awns, shorter awns 1-1.5 mm, longer awns (1) 1.5-3 (3.5) mm; upper glumes 1-veined, with a single, flexuous 2.5-4 (5) mm awn; lemmas 3-4 mm, tapering to a scabrous 1.5-2 (3) mm awn; anthers 1.5-2 mm, yellowish. Caryopses about 2 mm, brownish. 2n = 40.

Distribution

Colo., N.Mex., Tex., Utah, Calif., Kans., Ariz., Okla.

Discussion

Lycurus setosus grows on rocky slopes and open mesas, at elevations of 570-3400 m. Its range extends from the southwestern United States to northern Mexico, and, as a disjunct, in Argentina and Bolivia. It was found as an adventive (associated with wool waste) in North Berwick, York County, Maine, in 1902, but it has not been reported from there since. Its flowering time is July-October.

Lycurus setosus is sometimes confused with Muhlenbergia wrightii, which has a somewhat similar aspect but is normally found in moist habitats. Also, in M. wrightii the first glume is 1-veined with a very short awn, and the lemma is acuminate and unawned or with an awn no more than 1 mm long.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Lycurus setosus"
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
3 cm30 mm <br />0.03 m <br /> (?) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Charlotte G. Reeder +
(Nutt.) C. Reeder +
3 (?) +  and 1 (?) +
3 cm30 mm <br />0.03 m <br /> (?) +  and 5 cm50 mm <br />0.05 m <br /> (?) +
flexuous +
usually longer +  and commonly longer +
single +  and 2 +
scabridulous +
unequal +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
4 cm40 mm <br />0.04 m <br /> (9 cm90 mm <br />0.09 m <br />) +
hispidulous +  and glabrous +
scabridulous +  and smooth +
flat +  and folded +
1mm;2mm +
spikelike +
2 cm20 mm <br />0.02 m <br /> (?) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Bristly wolfstail +
scabrous +  and puberulent +
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
not woody +
Colo. +, N.Mex. +, Tex. +, Utah +, Calif. +, Kans. +, Ariz. +  and Okla. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
bisexual +  and fertile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
subequal +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
not absent +
glabrous +  and pubescent +
tapering +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sometimes longer +
acuminate +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
triangular +
inconspicuous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
concealed +  and prominent +
2 +  and 1 +
occasionally +  and acute +
4cm +  and 8cm +
spikelike +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
dry +  and fleshy +
spikelike +
scabridulous +  and smooth +
compressed-keeled +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
compressed +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Lycurus setosus +
species +
cuplike +
membranous +
7 +  and 13 +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +