Orcuttia pilosa

Hoover
Common names: Hairy orcuttgrass
Endemic
Treatment appears in FNA Volume 25. Treatment on page 292.
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Plants cespitose, hairy, usually densely so. Culms 5-20 (35) cm tall, 1-2 mm thick, simple or branching at the lower nodes, erect or decumbent, sometimes geniculate. Leaves with a faint collar line usually evident when dry; blades 4-6 cm long, 3-5 (8) mm wide. Spikes to 10 cm; lower internodes 5-15 mm; upper internodes 1.5-3 mm. Spikelets with 10-40 florets. Glumes about 3 mm, irregularly 3-toothed; lemmas 4-5 mm, teeth about equal and 1/3–1/2 as long as the lemmas, acute or awn-tipped; anthers 2.5-3 mm. Caryopses about 2 mm, elliptical; embryos 3/4 or more as long as the caryopses. 2n = 30.

Discussion

Orcuttia pilosa grows at elevations below 150 m in Madera, Merced, Stanislaus, and Tehama counties, California. It is listed as an endangered species by the U.S. Fish and Wildlife Service.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."/3" is not declared as a valid unit of measurement for this property.

... more about "Orcuttia pilosa"
pinkish +  and white +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
John R. Reeder +
Hoover +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
mushroom-button--shaped +
usually linear +  and lanceolate occasionally ovate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
spikelike +
oblong +  and elliptic +
2 cm20 mm <br />0.02 m <br /> (?) +
dumbbell--shaped +
evident +  and faint +
Hairy orcuttgrass +
branching +  and simple +
prostrate +  and decumbent +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
decumbent +  and erect +
geniculate +
3 cm30 mm <br />0.03 m <br /> (35 cm350 mm <br />0.35 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
10 +  and 40 +
round +  and compressed +
shorter or longer +
subtending +
3-toothed +
3 cm30 mm <br />0.03 m <br /> (?) +
uncinate +
spicate +  and ebracteate +
paniculate +  and racemose +
clavate +  and capitate +
hollow +  and solid +
not absent +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
truncate +  and slightly emarginate +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
subequal +  and or slightly shorter +
dry +  and fleshy +
disarticulating +
0 cm0 mm <br />0 m <br /> (10 cm100 mm <br />0.1 m <br />) +
pedicellate +  and sessile +
1 +  and 60 +
compressed +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
filiform +  and elongate +
Gramineae +
Orcuttia pilosa +
Orcuttia +
species +
membranous +
1/3 (?) +  and 1/2 (?) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
conspicuous +
plant +  and cespitose +
aquatic +  and terrestrial +
viscid-aromatic +
dioecious +, monoecious +  and synoecious +