140 Rhodora | JuLy 
cum, var. intermedium (Hook. & Arn.) D. C. Eaton, Ferns N. A. i. 
244, t. 31, fig. 4. (1879).—Oregon to Lower California. OREGON: 
Multnomah Co., October, 1877, Howell. CALirorNia: Feather River, 
Butte Co., March 29, 1919, Heller, no. 13,090; Little Chico, March 
10, 1897, Mrs. R. M. Austin, no. 1868; hills near Santa Rosa, Sonoma 
Co., March 10, 1902, Heller, no. 5011; open banks of Sonoma Creek, 
May 23, 1902, Heller, no. 5030; large mats on boulders and ledges, 
King's Mountain, San. Mateo Co., January 15, 1902, Baker, no. 
235; Stockton Pass, May 4, 1879, L. G. Yates; Santa Cruz, 1873, 
Anderson; foothills west of Los Gatos, Santa Clara Co. March 5, 
1904, Heller, no. 7255; San Luis Obispo Co., 1886, M. M. Miles; 
Sulphur Mountains, Ventura Co., June, 1908, Abrams & McGregor, 
no. 31; near San Bernardino, May, 1894, Parish, no. 2824. LOWER 
CALIFORNIA: Guadalupe Island, 1889, Palmer, no. 857. 
The Pacific American representative of var. serratum Willd. of 
southern Europe, the Mediterranean region and the Atlantic Islands. 
Differing chiefly in the scales of the rhizome, which are usually 
shorter and less attenuate than in var. serratum. When he published 
P. californicum var. intermedium, Eaton commented on it as making 
"an inconveniently near approach to P. vulgare" 
time quoted Milde as remarking ‘ 
and at the same 
‘of the veinlets of P. vulgare, var. 
serratum, ‘Interdum ramos anastomosantes invent,’ " the character 
chiefly relied upon to keep P. californicum separate from P. vulgare. 
Azorean specimens (for instance, Ponta Delgada, Ware) of var. 
serratum certainly show quite as many areolae as any Californian 
plants. 
Var. INTERMEDIUM, forma projectum, n. f., pinnis mediis imisque 
inequaliter abbreviatis subtruncatis, costis excurrentibus. CALIFORNIA: 
Chico Canyon, Butte Co., December 29, 1902, E. B. Copeland, no. 
2749 (TYPE in Gray Herb.). 
Var. Kaulfussii (D. C. Eaton), n. comb.  Fronds ovate to ovate- 
oblong, coriaceous, 0.5-2.1 dm. long, 0.4-1.3 dm. broad, with 7-15 
pairs of oblong to oblong-linear obtuse to acutish serrate, crenate or 
subentire pinnae 0.7-1.2 cm. broad: veinlets more often anastomos- 
ing than in most varieties.—P. californicum Kaulf. Enum. Fil. 102 
(1824); P. californicum, var. Kaulfussii D. C. Eaton, Ferns N. A. i. 
244 (1879).— California and Lower California. The following are 
characteristic. CALIFORNIA: Berkeley, March 1, 1891, Blankinship; 
vicinity of San Bernardino, March 23, 1897, Parish, no. 4347; Los 
Angeles, July, 1879, James; Del Mar, April 4, 1914, Clements, no. 3; 
near mouth of San Gabriel Canyon, San Diego Co., March 13, 1903, 
Abrams, no. 3120. Lower CALIFORNIA: Guadalupe Island, 1875, 
Palmer, nos 103, March-June, 1897, Anthony, no. 256. 
