184 ANTHOCEROTACEAE 
Marin Co., by Dr. Bolander and by T. S. Brandegee ; Duncan’s 
Mills (1198, 1200) and Cazadero (1199) Sonoma Co.; Mendocino 
(587, 702); Deer Creek Cafion, Russ and Graham’s Ranch 
(1070) Humboldt Co.; near Douglas City (1202), Trinity Co.; 
Oak Run, Shasta Co. (Baker and Nutting) ; Mitchell’s Сайоп, 
Mt. Diablo (1201); Berkeley (1204); Palo Alto (Prof. D. H. 
Campbell) ;, Santa Monica (Dr. Н. E. Hasse); San Bernardino 
(Mr. 5. В. Parish, 1731, 2220). 
Anthoceros Pearsoni is the commonest yellow-spored Anthoceros 
of California, and perhaps of the Pacific Coast as a whole. We 
have seen as many as twenty specimens, ranging from southern 
California to Washington, and they are always very clearly dis- 
tinct from Anthoceros laevis L., A. Carolinianus Michx., and А. 
Най Aust. ; differing from the last-mentioned in having Ше cap- 
sule usually four times as long, in the much more perfect pseudo- 
elaters, composed of 1-4 elongated cells, in the spores being 
scarcely otherwise roughened than by 8-15 small crescentic ver- 
rucae, etc.; very different from both A. laevis and A. Carolinianus, 
in the character óf the spore-markings, the spores of the two latter 
species being always thickly granulose-papillate. Sterile condi- 
чое ean sometimes be only doubtfully distinguished from 4. 
Найт, but can be separated from glandular-thickened forms of A. 
Carolinianus occidentalis by the narrower segments and often pe- 
duncled glands. The species is extremely variable in thickness 
and form of thallus, though very constant in spore-markings. 
In its thicker, slightly costate conditions, particularly when the 
glandular-thickenings аге long-stalked, descending, and tuber- 
` like, the thallus bears some resemblance to that of A. phymatodes, 
but in all such cases, we believe, the attachment of the tubers 
never becomes strictly ventral ; their peduncles can, with care, 
always be traced back to the margins of the frond. The glands 
or tubers are 10-25 cellsin thickness and consist of a more or less 
distinctly defined capsule of 1—3 layers of undifferentiated cells еп- 
а eel ме покрит 
-drops or densely crowded with whitish gran- 
uem These organs are evidently food reservoirs, adapting the 
icu wirds through the dry summers of the region that | 
its. In the neighborhood of San Francisco the 
