Deschampsia elongata

(Hook.) Munro
Common names: Slender hairgrass
Treatment appears in FNA Volume 24. Treatment on page 631.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants perennial; densely cespitose. Culms (10) 30-120 cm. Leaves sometimes forming a basal tuft; sheaths glabrous; ligules 2.5-8 (9) mm, acute to acuminate; blades 7-30 cm long, 0.2-2 mm wide, usually involute. Panicles 5-30 (35) cm long, 0.5-1.5 (2) cm wide, erect or nodding; branches erect to ascending. Spikelets 3-6.7 mm, bisexual, narrowly V-shaped, appressed to the branches. Glumes equaling or exceeding the florets, narrowly lanceolate, usually pale green, sometimes purple-tipped, 3-veined, acuminate; lower glumes (3) 3.2-5.5 (6.7) mm; upper glumes (3) 3.1-5.4 (6) mm; callus hairs 0.3-1.15 mm; lemmas 1.7-4.3 mm, smooth, shiny, glabrous, apices weakly toothed or erose, awns 1.5-5.5 (6) mm, straight to slightly geniculate, attached from slightly below to slightly above the middle of the lemma, exceeding the florets by 1-2.5 mm; anthers 0.3-0.5 (0.7) mm. 2n = 26.

Distribution

Maine, Mass., N.Mex., Wash., Utah, Calif., Idaho, Mont., Alta., B.C., Nunavut, Yukon, Wyo., S.C., Ariz., Alaska, Nev., Oreg.

Discussion

Deschampsia elongata grows in moist to wet habitats, from near sea level to alpine elevations, from Alaska and the Yukon south to northern Mexico and east to Montana, Wyoming, and Arizona. It also grows, as a disjunct, in Chile. The records from Maine and Colorado probably represent introductions.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Deschampsia elongata"
membranous +  and scarious +
0.7 cm7 mm <br />0.007 m <br /> (?) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
toothed +
Mary E. Barkworth +
(Hook.) Munro +
1 (?) +  and 3 (?) +
6 cm60 mm <br />0.06 m <br /> (?) +
straight +
attached +
subapical +
geniculate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
7 cm70 mm <br />0.07 m <br /> (30 cm300 mm <br />0.3 m <br />) +
not evident +
folded +  and rolled +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
erect;ascending +
spikelike +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.115 cm1.15 mm <br />0.00115 m <br />) +
Slender hairgrass +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
not woody +
Maine +, Mass. +, N.Mex. +, Wash. +, Utah +, Calif. +, Idaho +, Mont. +, Alta. +, B.C. +, Nunavut +, Yukon +, Wyo. +, S.C. +, Ariz. +, Alaska +, Nev. +  and Oreg. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
viviparous +  and bisexual +
compressed +
reduced +
1mm +  and 2.5mm +
3-veined +  and purple-tipped +
shorter or longer +
subtending +
acuminate +  and lanceolate +
subequal +  and unequal +
exceeding the florets +  and equaling +
uncinate +
(3)5-7-veined +
rounded +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
acute +  and acuminate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
membranous +
inconspicuous +
lanceolate +  and ovatelanceolate +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +
5cm +  and 30cm +
nodding +  and erect +
spikelike +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
dry +  and fleshy +
1 +  and 60 +
v--shaped +
0.3 cm3 mm <br />0.003 m <br /> (0.67 cm6.7 mm <br />0.0067 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Deschampsia elongata +
Deschampsia +
species +
membranous +
0.31 cm3.1 mm <br />0.0031 m <br /> (0.54 cm5.4 mm <br />0.0054 m <br />) +
parallel +  and converging +
stoloniferous +  and rhizomatous +
plant +  and cespitose +
aquatic +  and terrestrial +