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phylla is often found with apothecia but the other is seldom seen 
fertile. The superior surface of both plants is more or less reticulated, 
opaque and sub-shining. Below C. glauca stenophyl la is commonly corti- 
cated brown and shining, while stenophylla is usually white, decorticate 
and opaque, or sub-shining. These characters are very inconstant however. 
Plate II. Fig. 3. 
5. Cetraria Californica Tuck. Suppl. 1859. p. 203. 
Plate II. Fig. 5. 
The discrepancy between the original description of this plant and 
the published examples, long ago attracted my notice. Tuckerman’s 
description converted into English reads: Thallus caespitose, cartilagin- 
eous, lacunose-subcanaliculate, opaque, greenish-fuscescent, irregularly 
sub-dichotomously branched, the branches patent, fertile branched thick- 
ened above; apothecia terminal, appendiculate, margins dentate-fimbriate 
at length convex, black. The^author further remarks of its habit; “fronds 
in small roundish masses, many branches diverging from a single base, 
with the aspect of a small slender state of Ramalina calicaris b. than of 
the erect Cetrai'ia to which, and in particular C. trista and C. aculeata^ 
it is indeed, if I mistake not, nearest allied.” Tuckerman’s diagnosis of the 
form in his Synopsis p. 29, differs only in a slight amplification. He 
states that the plant is ‘ fruticulose, sub-fistulous, compressed-terete, at 
length deeply canaliculate lacunose” — “the disk dark green, becomimg black 
aud excluding the toothed margin.” The term compressed-terete is scarcely 
applicable to any condition shown in my copies of the following exsiccati ; 
Kryptogamae exsiccati (Zahlbruckner) no. 1047; Lichenes Boreali Am. 
(Cummings) no. 142; Decades No. Am. Lichens (Cummings) no. 212; and 
two copies of no. 192 of Dr. Hasse’s distribution. There is furthermore 
a marked divergence in color and mode of branching in the examples cited 
from Tuckerman’s description. In 1908 Mr. A. S. Foster favored me with 
a copious collection of a plant that after considerable study I pronounced 
to be Cetraria Californica of Tuckerman's Synopsis. The material 
answered in every way to the description except that the margins of the 
apothecia were almost uniformly smooth rather than dentate-fimbriate 
or toothed. Examination of the material made more emphatic the differ- 
ences apparent between specimens of the exsiccati cited and Tuckerman’s 
description. A recent lot of lichens from Mr. Foster contained a peculiar 
dark almost black Cetraria-like form reminding one of C. sepincola that 
I eventually considered equivalent to that form of C. Californica repre- 
