RSA - California Botanic Garden Herbarium (RSA:POM)
f6418400-f4be-4df8-9670-a18f75f285b1
196126
Equisetum hyemale var. affine (Engelm.) A.A. Eat.
Equisetaceae
E. B. Copeland
330
1929-07-06
United States, California, Butte, Jonesville.
40.112583 -121.46507 +-1300m. NAD27
Tue Feb 5 15:41:41 2013; georef from 2006-2015 archive backup file
On and near rocky creek-banks; common but not abundant. Inconstant in characters supposed to mark the variety and to distinguish E. robustum A. Br. as a species. There are usually two rows of tubercles. ‘Rosettes’ are present, but may be almost obsolete, and the groove in the sheath-teeth may be evident or obsolete.