Trachypogon secundus

(J. Presl) Scribn.
Common names: Crinkle-awn
Treatment appears in FNA Volume 25. Treatment on page 626.

Plants perennial. Culms 60-120 cm, erect; nodes appressed-hirsute. Sheaths sparsely appressed-pilose; ligules 2-5 mm, stiff, acute; blades usually 12-35 cm long, 3-8 mm wide, with a broad midrib. Racemes 10-18 cm, the internodes glabrous. Pedicellate spikelets 6-8 mm; glumes pilose; awns 4-6 cm, pilose below, with 1-2 mm hairs, nearly glabrous distally; anthers 4-5 mm, orange. 2n = 20.

Discussion

Trachypogon secundus is found in sandy prairies, woodlands, rocky hills, and canyons, in well-drained soils at 500-2000m. Statements about is range are difficult to make because of disagreement as to whether northern plants, such as those found in the Flora region, belong to the same species as those found elsewhere.

Trachypogon secundus resembles Heteropogon, but differs in the longer, non-disarticulating inflorescence and shorter, pale awns. It rates as fairly good fodder when green, but is seldom abundant enough to be an important forage grass.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Trachypogon secundus"
0.4 cm4 mm <br />0.004 m <br /> - 0.5 cm5 mm <br />0.005 m <br /> +
anatomy +  and kranz +
Kelly W. Allred +
- J. Presl Scribn. +
1 - ? +  and 3 - ? +
4 cm40 mm <br />0.04 m <br /> - ? +
glabrous +  and pilose +
plumose +
4 cm40 mm <br />0.04 m <br /> - 6 cm60 mm <br />0.06 m <br /> +
slender +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
pseudopetiolate +
non-radiate +  and radiate +
well-developed +
12 cm120 mm <br />0.12 m <br /> - 35 cm350 mm <br />0.35 m <br /> +
flat +  and involute +
reduced +
0.3 cm3 mm <br />0.003 m <br /> - 0.8 cm8 mm <br />0.008 m <br /> +
spikelike +
Crinkle-awn +
purple +  and reddish +
60 cm600 mm <br />0.6 m <br /> - 120 cm1,200 mm <br />1.2 m <br /> +
not woody +
Ariz. +, N.Mex. +  and Tex. +
capillary +
sometimes longer +
concealing +
compressed +  and terete +
shorter or longer +
subtending +
compressed +  and rounded +
unequal +
uncinate +
0.1 cm1 mm <br />0.001 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
bracteate +  and ebracteate +
pedunculate +  and multiple-stalked +
axillary +  and subtending +
photosynthetic +
not aromatic +
tapering +
0.2 cm2 mm <br />0.002 m <br /> - 0.5 cm5 mm <br />0.005 m <br /> +
membranous +
inconspicuous +
complex +  and simple +
concealed +  and prominent +
appressed-hirsute +
pedicellate +
not fused +
dry +  and fleshy +
10 cm100 mm <br />0.1 m <br /> - 18 cm180 mm <br />0.18 m <br /> +
elongate +
appressed-pilose +
in triplets +  and paired +
bisexual +, sterile +  and heterogamous +
usually smaller +  and reduced +
0.6 cm6 mm <br />0.006 m <br /> - 0.8 cm8 mm <br />0.008 m <br /> +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Gramineae +
Trachypogon secundus +
Trachypogon +
species +
membranous +
sessile-pedicellate +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +