Move to List 1B? Known only from the type collection from deserted Pine City above Mammoth. Not in TJM (1993); see S. niveum in TJM 2. See University of California Publications in Botany 6:358 (1916) for original description, and Leaflets of Western Botany 6(3):62-63 (1950) for species account.
Definitions of codes preceding a county and/or quad:
Uncertain about distribution or identity
Uncertain about distribution, but presumed extirpated if once present
Occurrence confirmed, but possibly extirpated
Species may be present in other areas where conditions are favorable.
Quad data is not available for all List 3 and 4 plants. For those that do contain this data, it has not been quality controlled and is potentially incomplete, inaccurate, and/or out of date. Please use caution when referencing this information. We are currently working hard to maintain this data and hope to provide accurate and up to date information in the near future.