Agrostis clavata

Trin.
Common names: Clavate bent
Treatment appears in FNA Volume 24. Treatment on page 646.
Please click on the illustration for a higher resolution version.
Illustrator: Sandy Long

Copyright: Utah State University

Plants annuals or short-lived perennials; densely tufted, not rhizomatous or stoloniferous. Culms 30-70 cm, erect, smooth, with 3-6 nodes. Leaves mostly basal or basal and cauline; sheaths smooth; ligules (0.5) 1.5-4.2 mm, dorsal surfaces scabrous, apices truncate to rounded, erose-lacerate, often ciliolate; blades 10-20 cm long, 1-5 (7) mm wide, flat, scabrous at least along the margins and/or veins. Panicles 8-35 cm long, 3-10 cm wide, widely ovate, becoming lax, open, usually exserted, bases sometimes enclosed in the upper sheaths at maturity, lowest node with (1) 2-8 branches; branches scabrous, spreading, branched above midlength, spikelet-bearing in the distal 1/2 - 2/3, lower branches 3-12 cm; pedicels 0.5-5.5 mm, clavate; secondary panicles often present in the leaf-axils, smaller than the primary panicles. Spikelets narrowly ovate to lanceolate, greenish or light brownish purple. Glumes subequal, 1.5-2.8 mm, lanceolate, 1-veined, keels somewhat aculeolate, apices usually acute, sometimes acuminate; calluses usually sparsely hairy, hairs to 0.2 mm, sometimes glabrous; lemmas 1.2-2 mm, smooth, glabrous, translucent to opaque, 5-veined, veins prominent distally or obscure, apices acute, entire, unawned; paleas absent, or to 0.2 mm and thin; anthers 3, 0.3-0.6 mm, to 1/2 as long as the lemmas. Caryopses 0.9-1.3 mm. 2n = [28], 42.

Discussion

Agrostis clavata grows in disturbed ground on sandbars and gravelbars, and in wet meadows and coniferous forests, from Sweden across northern Asia to Kamchatka. It was recently found in Alaska, the Yukon, and the Northwest Territories, and appears to be native there. It differs from the similarly large-panicled A. scabra (see next) in its much broader, flat leaves.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Agrostis clavata"
membranous +  and scarious +
0 +  and 1/2 +
not penicillate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Acute (?) +, Acuminate (?) +, Erose-lacerate (?) +, Truncate (?) +  and Rounded (?) +
M.J. Harvey +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
geniculate +
rounded +  and keeled +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not evident +
scabridulous +
cross +, linear +  and narrowly lanceolate +
1mm;5mm +
spikelike +
Clavate bent +
not branching +
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +
not woody +
Alaska +  and Yukon +
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 +
lanceolate +
subequal +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
uncinate +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
diffuse +  and dense +
cauline +  and basal +
translucent +  and opaque +
warty-tuberculate +  and scabridulous +
lanceolate +  and ovate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
membranous +
inconspicuous +
lanceolate +
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
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 6 +
2 +  and 1 +
well-developed +
2-keeled +
minute +  and subequal +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
8cm +  and 35cm +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
dry +  and fleshy +
not prolonged +
hairy +  and glabrous +
scabrous +  and scabridulous +
light brownish +  and greenish +
1 +  and 60 +
narrowly ovate +  and lanceolate +
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 clavata +
Agrostis +
species +
membranous +
2 +  and 5 +
not convergent +
obscure +  and prominent +
scabrous +  and scabridulous +
stoloniferous +  and rhizomatous +
plant +  and cespitose +
aquatic +  and terrestrial +