Flora of North America species comparison

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Orcuttia tenuis

slender Orcutt grass
Habit Plants sometimes weakly cespitose, but often with a single main culm branching 2-10 cm above the base, sparsely hairy.
Culms

5-15(25) cm tall, 0.5-1 mm thick, often strictly erect, but sometimes decumbent when "top heavy" from profuse branching above.
Leaves

usually without a "collar" line;

blades 1-3 cm long, 1.5-2 mm wide.
Spikes

5-10 cm, more congested distally than basally;

lower internodes 5-15 mm;

upper internodes 2-7 mm.
Spikelets

with 5-20 florets.
Glumes

subequal or the lower glumes a little shorter than the upper, 3-6 mm, with 3-5 teeth to 1 mm;

lemmas 4.5-6 mm, acute or awn-tipped teeth about equal and 1/2 as long as the lemma, spreading or slightly recurved;

paleas slightly shorter than the lemmas;

anthers about 3 mm.
Caryopses

about 3 mm, narrowly oblong;

embryos nearly as long as the caryopses.
2n

= 26.

Orcuttia tenuis
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Orcuttia tenuis grows at 25-100 m in Shasta and Tehama counties of the Central Valley of California, with outlying populations in Sacramento County and the lower montane regions of Lake, Shasta, and Siskiyou counties, California. It is listed as a threatened species by the U.S. Fish and Wildlife Service.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 25, p. 292.
Parent taxa Poaceae > subfam. Chloridoideae > tribe Orcuttieae > Orcuttia
Sibling taxa
O. californica, O. inaequalis, O. pilosa, O. viscida
Name authority Hitchc.
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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