The following Participating Institutions are custodians for this species in the CPC National Collection:
Cincinnati Zoo & Botanical Garden
The conservation of Orcuttia tenuis is fully sponsored.
Holly Forbes contributed to this Plant Profile.
Slender Orcutt grass is an annual species that grows in vernal pools. It typically flowers from May to July, depending on location and elevation. Plants are slightly hairy and branch only from the upper parts of stems, up to 20 cm. tall.
Distribution & Occurrence
Vernal pools on Northern Volcanic Ashflow and Northern Volcanic mudflow. These pools fill with rain water during the cool winter season and gradually dry out during the summer. (Recovery Plan).
The largest concentration of populations is in Tehama Cou
|Of the 82 occurrences recorded, 76 are thought to be extant. 36% of the populations occur wholly or partially on federal lands.|
Conservation, Ecology & Research
Optimal germination is achieved through stratification followed by warm days and mild nights.
Peak flowering of this species typically occurs in May in the Central Valley , but not until June or July on the Modoc Plateau . Unlike Orcuttia pilosa and Tuctoria greenei, Orcuttia tenuis is not likely to die when pools are flooded by late spring or summer rains. (Recovery Plan)
Corbin, B.; Schoolcraft, G. 1989. Orcuttia tenuis species management guide. Unpublished report to Lassen National Forest and Susanville District Bureau of Land Management. Susanville. US National Forest Service.
U.S. Fish & Wildlife Service. 2005. Recovery Plan for Vernal Pool Ecosystems of California and Southern Oregon. Portland. USFWS.