Agrostis tolucensis

Kunth
Treatment appears in FNA Volume 24. Treatment on page 656.
Please click on the illustration for a higher resolution version.
Illustrator: Sandy Long

Copyright: Utah State University

Plants perennial; cespitose. Culms (3.3) 5.5-60 cm, erect, glabrous, with (2) 3-4 nodes. Leaves mostly basal or evenly distributed; sheaths glabrous, scabridulous; ligules 2-6.2 mm, membranous, scabridulous dorsally, apices acute to more or less truncate, erose to lacerate; blades 4-19 cm long, 0.5-4 mm wide, involute or flat, scabrous or smooth over the veins. Panicles 1.5-14 cm long, 0.5-1.5 cm wide, lanceoloid, somewhat spikelike, dense to somewhat open, exserted at anthesis; branches appressed, shorter than 2 cm; pedicels 0.7-3 (4.5) mm, scabrous. Spikelets purple to green, shiny. Glumes subequal, 2-3.5 mm, 1-veined, keeled, keels and back usually smooth, occasionally scabrous, apices acute, muticous; lower glumes wider than the upper glumes; calluses with 2 tufts of hair to 0.3 mm; lemmas 1.4-1.9 mm, glabrous, 5-veined, veins evident, apices truncate to acute, microdenticulate, teeth to about 0.1 mm, dorsally awned from midlength or below, awns 2-3.5 mm, exserted, twisted, geniculate, scabridulous; paleas 0.1-0.2 mm, hyaline, linear; anthers 3, 0.5-1 mm. Caryopses 0.7-1.2 mm; endosperm soft. 2n = 28.

Discussion

Agrostis tolucensis grows in alpine meadows, usually in damp areas by lakes or streams. It is native from Mexico to Chile, Bolivia, and Argentina, growing in the Andes at 1800-4900 m. Its presence in the Flora region is dubious; two specimens in the S.M. Tracy herbarium, from Brewster and Brown counties in Texas, are listed in the Flora of Texas online database (http://www. csdl.tamu.edu/FLORA/tracy/mainl.html). Attempts to locate the specimens in 2005 were unsuccessful, suggesting the records may have been based upon misidentifications which have since been rectified.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Agrostis tolucensis"
membranous +  and scarious +
not penicillate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Truncate (?) +  and Acute (?) +
M.J. Harvey +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
geniculate +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
rounded +  and keeled +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
4 cm40 mm <br />0.04 m <br /> (19 cm190 mm <br />0.19 m <br />) +
not evident +
scabridulous +
flat +  and involute +
0.5mm;4mm +
spikelike +
hairy +  and glabrous +
not branching +
5.5 cm55 mm <br />0.055 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not woody +
Conn. +, N.J. +, N.Y. +, N.Mex. +, Wash. +, Va. +, W.Va. +, Del. +, D.C +, Wis. +, Ariz. +, Mont. +, Oreg. +, Wyo. +, Pacific Islands (Hawaii) +, Md. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Tex. +, La. +, Utah +, Puerto Rico +, N.Dak. +, Nebr. +, Tenn. +, N.C. +, S.C. +, Pa. +, Okla. +, Calif. +, Nev. +, Colo. +, Miss. +, Alaska +, Ala. +, Kans. +, S.Dak. +, Ind. +, Ark. +, Ill. +, Ga. +, Iowa +, Ohio +, Idaho +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Mo. +, Minn. +, Mich. +  and Ky. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
(1)1.3-2(4) times longer than +
subtending +
subequal +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
uncinate +
diffuse +  and dense +
distributed +
warty-tuberculate +  and scabridulous +
lanceolate +  and ovate +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
membranous +
0.2 cm2 mm <br />0.002 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
membranous +
inconspicuous +
lanceolate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
concealed +  and prominent +
3 +  and 4 +
2 +  and 1 +
well-developed +
2-keeled +
minute +  and subequal +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
1.5cm +  and 14cm +
spikelike +  and lanceoloid +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (?) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dry +  and fleshy +
not prolonged +
scabridulous +
purple +  and green +
1 +  and 60 +
lanceolate +  and narrowly oblong or ovate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Agrostis tolucensis +
Agrostis +
species +
membranous +
2 +  and 5 +
scabridulous +
geniculate +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
not convergent +
scabrous +  and scabridulous +
stoloniferous +  and rhizomatous +
plant +  and cespitose +
aquatic +  and terrestrial +