1920] | Weatherby,—Varieties of Pityrogramma triangularis — 119 
the direction of one or another of the other varieties; Underwood's 
raising of it to specific rank seems not to have been justified. 
Var. pallida, n. var. Stipitibus nigrescentibus superne basinque 
versus plerumque minute glandulosis et albo-farinosis; laminis tenu- 
ibus, supra propter glandulas albidas opacas subfarinosas plerumque 
numerosas pallidis, subtus albo-farinosis; pinnarum  infimarum 
segmentis vel pinnulis basiscopis elongatis dilatatis profunde pinna- 
tifidis; sporis cireumscriptione rotundis vel deltoideis angulis obtus- 
issimis. 
CALIFORNIA: SANTA CLARA County: Mrs. Bush (G). TULARE 
County: Kaneah, Apr. 28, 1895, Eastwood (G). MADERA County: 
Hills about three miles above Pollasky, Apr. 11,1906, Heller, 8141(TvPE 
in Hb. Gray; also N, S). Amapor County; White Bar, alt. 1000 
ft, May 13, 1896, Hansen, 1637 (N). Exporapo County: rocky 
bluffs along Camp Creek. 8 miles north of Grizzly Flats, June 1, 
1902, W. G. Watkins, 16 (N). Burrs County: Iron Caton, 1870, 
May, 1883, May, 1896, 197, May, 1897, Mrs. Austin (all N). Wrrnout 
DEFINITE LOCALITY: 1879, Miss E. D. Pelton (Y). 
Heller's comment on the type collection describes very well the 
obvious external characters of this variety which he supposed to be 
viscosa. “When fresh," he says, “the upper side of the frond is 
much paler than is that of the other species [triangularis| and the 
whole plant less stiff." The specimen of the type number in the 
Herbarium of the Philadelphia Academy has the stipe more nearly 
glabrous than usual and the white indument scanty or lacking. 
So far as the material at hand shows, var. pallida holds its charac- 
ters better than any of the other varieties. "These characters, how- 
ever, are rather slight and comparative, and in the region where both 
occur, P. triangularis exhibits some tendency to develop white- 
powdered forms which suggest a transition to var. pallida. Every- 
thing considered, I am unable to regard the latter as morethan a well- 
marked variety. 
Var. Maxoni, n. var. Stipitibus rubro-brunneis nitidis glabris, 
laminis subcoriaceis vel tenuibus supra plerumque sparse glandu- 
losis, glandulis flavescentibus juventute nitidis aetate opacis; pin- 
narum infimarum segmentis vel pinnulis basiscopis plerumque elon- 
gatis et profunde pinnatifidis; sporis circumscriptione trilobatis, 
lobis rotundatis. 
Arizona: Santa Catalina Mts., Apr. 23, 1881, Pringle (G); shaded 
pass, rocky cafions of the Santa Catalina Mts., May 293, 1881, 
Pringle (N); under rock shelf near falling water, head of Rincon 
Valley, Rincon Mts., alt. 3500 ft., July 27, 1909, J. C. Blumer, 3271 
