CAS - California Academy of Sciences Vascular Plants (CAS:BOT-BC)
57855
urn:catalog:CAS:BOT-BC:57855
urn:catalog:CAS:DS:196373
Equisetum hyemale subsp. affine (Engelm.) Calder & Roy L. Taylor
Equisetaceae
Copeland, E. B.
330
1929-07-06
July 6, 1929
United States, California, Butte County, Jonesville.
On and near rocky creek-banks.
Common but not abundant. Inconstant in characters supposed to mark the variety and to distiguish 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.