Agrostis howellii

Scribn
Common names: Howell's bent
Endemic
Treatment appears in FNA Volume 24. Treatment on page 654.
Please click on the illustration for a higher resolution version.
Illustrator: Sandy Long

Copyright: Utah State University

Plants perennial; cespitose, not rhizomatous, not stoloniferous. Culms 40-80 cm, geniculate and decumbent at the base, sometimes rooting at the lower nodes, with 3-6 nodes. Leaves mostly cauline; basal leaves withered by anthesis; cauline leaves persisting; sheaths smooth or scabridulous; ligules (0.9) 2.7-5 mm, dorsal surfaces scabrous, apices truncate to acute, erose to lacerate; blades 15-20 cm long, 3-5 mm wide, flat. Panicles 10-25 cm long, 3.5-11 cm wide, ovate, open and diffuse, bases usually exserted, rarely enclosed in the upper sheaths, lowest node with (1) 2-6 branches; branches scabridulous, flexuous, spreading, spikelets usually only on the distal 1/2, lower branches 3-10 cm; pedicels 1.2-9.4 mm. Spikelets ovate to lanceolate, green, not or slightly tinged with purple. Glumes unequal, 2.3-3.5 mm, 1 (3) -veined, veins scabridulous, acute to acuminate; callus hairs to 0.3 mm, abundant; lemmas 2.5-3 mm, usually smooth, sometimes scabridulous, translucent to opaque, 5-veined, veins prominent distally or obscure, apices acute to obtuse, lateral-veins extending as 4 teeth to 0.5 mm, awned from the lower 1/3, awns 4-6 mm, geniculate; paleas absent or minute; anthers 3, 1-1.3 mm. Caryopses 1.2-1.6 mm; endosperm liquid. 2n = 28.

Discussion

Agrostis howellii is a rare Washington and Oregon endemic, growing in shady woodlands and at the base of cliffs.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Agrostis howellii"
membranous +  and scarious +
not penicillate +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
awned +, truncate +  and entire +
Acute (?) +  and Obtuse (?) +
M.J. Harvey +
Scribn +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
geniculate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
rounded +  and keeled +
pseudopetiolate +  and branching +
swelling +
15 cm150 mm <br />0.15 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not evident +
scabridulous +
cross +, linear +  and narrowly lanceolate +
3mm;5mm +
scabridulous +
spikelike +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
hairy +  and glabrous +
Howell's bent +
geniculate +
40 cm400 mm <br />0.4 m <br /> (80 cm800 mm <br />0.8 m <br />) +
not woody +
1/4 +  and 1/3 +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
(1)1.3-2(4) times longer than +
subtending +
unequal +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
uncinate +
diffuse +  and dense +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
translucent +  and opaque +
pubescent +  and glabrous +
scabridulous +
lanceolate +  and ovate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
membranous +
inconspicuous +
lanceolate +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 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 +
10cm +  and 25cm +
3.5 cm35 mm <br />0.035 m <br /> (11 cm110 mm <br />0.11 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.94 cm9.4 mm <br />0.0094 m <br />) +
dry +  and fleshy +
not prolonged +
hairy +  and glabrous +
scabridulous +  and smooth +
tinged with purple +  and green +
1 +  and 60 +
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 howellii +
Agrostis +
species +
membranous +
not convergent +
obscure +  and prominent +
scabridulous +
Acute (?) +  and Acuminate (?) +
not stoloniferous +  and not rhizomatous +
plant +  and cespitose +
aquatic +  and terrestrial +