Regularity: Regularly occurring
Global Range: Achnatherum stillmanii is restricted to the northern High Sierra Nevada in California.
Catalog Number: US 556922
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Card file verified by examination of alleged type specimen
Preparation: Pressed specimen
Collector(s): H. N. Bolander
Year Collected: 1870
Locality: Blue Canon, Sierra Nevada Mts., California, United States, North America
- Isotype: Bolander, H. N. 1872. Proc. Calif. Acad. Sci. 4: 169.
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 21 - 80
Comments: The number of distinct occurrences is unknown but there are 68 accession records in the Consortium of California Herbaria database as of August 2007. Forty-five of these are recent collections since 1970.
National NatureServe Conservation Status
Rounded National Status Rank: N3 - Vulnerable
NatureServe Conservation Status
Rounded Global Status Rank: G3 - Vulnerable
Reasons: Achnatherum stillmanii is endemic to California. It grows in scattered locations in the high Sierra Nevada and according to the Flora of North America (2007), may be edaphically restricted.
Names and Taxonomy
Comments: Treated in the genus Achnatherum by Kartesz (1999); often (e.g., Kartesz 1994) treated in the genus Stipa.
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