Achnatherum parishii subsp. parishii

Common names: Parish's needlegrass
Synonyms: Stipa coronata subsp. parishii
Treatment appears in FNA Volume 24. Treatment on page 129.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Culms 20-80 cm tall, 1.5-2 mm thick, mostly glabrous, pubescent below the nodes. Basal sheath margins hairy distaily. hairs 1-3.2 mm; blades 11-30+ cm long, 2.5-4.2 mm wide, usually flat or only partly closed, sometimes completely convolute, straight to somewhat arcuate distaily. Panicles 11-15 cm long, 2-4 cm wide. Florets 5.5-6.5 mm; awns 15-35 mm; paleas sparsely hairy between the veins, hairs about 1/2 as long as the lemma hairs, apices usually rounded, occasionally somewhat pinched; anthers 3.5-4.5 mm, glabrous. Caryopses 5-6 mm, fusiform. 2n = unknown.

Discussion

Achnatherum parishii subsp. parishii grows on dry, rocky slopes, in desert shrub and pinyon-juniper associations, from the coastal ranges of California to northeastern Nevada, eastern Utah, and the Grand Canyon in Arizona. Its range extends into Baja California, Mexico. It differs from A. coronatum in its shorter culms and once-geniculate awns, and from subsp. depauperatum in its longer culms, hairy sheath margins, and sparsely hairy paleas.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."prolonged" is not a number.

membranous +  and scarious +
not penicillate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
awned +, bifid +, bilobed +  and entire +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Mary E. Barkworth +
(Vasey) Barkworth +
1 (?) +  and 3 (?) +
flexuous +
subterminal +  and eccentric +
usually scabrous +  and scabridulous +
once-geniculate +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
keeled +  and rounded +
pubescent +  and glabrous +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
straight to somewhat +
11 cm110 mm <br />0.11 m <br /> (30 cm300 mm <br />0.3 m <br />) +
not evident +
involute +, convolute +  and flat +
2.5mm;4.2mm +
flexuous +  and straight +
spikelike +
well-developed +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Parish's needlegrass +
branching +  and not branching +
perennial +  and annual +
20 cm200 mm <br />0.2 m <br /> (80 cm800 mm <br />0.8 m <br />) +
intravaginal +  and basal +
pubescent +  and glabrous +
10 cm100 mm <br />0.1 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
not woody +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Utah +, Calif. +, Ariz. +  and Nev. +
1/5 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
0.48 cm4.8 mm <br />0.0048 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
sometimes longer +
terete +  and fusiform +
5.5mm +  and 6.5mm +
1-10-veined +
subtending +
lanceolate +
unequal +  and subequal +
membranous +
uncinate +
0.1 cm1 mm <br />0.001 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
solid +  and hollow +
pubescent +  and glabrous +
basally concentrated +  and evenly distributed +
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
ovate +, rectangular +  and lanceolate +
stiffly membranous +  and coriaceous +
asymmetric +  and truncate +
pubescent +  and glabrous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
membranous +
membranous +
inconspicuous +
not lobed +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.9mm +  and 1.2mm +
concealed +  and prominent +
3 +  and 5 +
2 +  and 1 +
pubescent +  and glabrous +
well-developed +
not keeled +
reduced +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
11cm +  and 15cm +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
dry +  and fleshy +
not prolonged +
1 +  and 60 +
unisexual +  and bisexual +
laterally compressed +  and terete +
1 (?) +  and 3 (?) +
simple +  and compound +
Stipa coronata subsp. parishii +
Achnatherum parishii subsp. parishii +
Achnatherum parishii +
subspecies +
membranous +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
inconspicuous +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
plant +  and cespitose +
aquatic +  and terrestrial +