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sented in the exsiccati mentioned. The specimens were sufficiently variant 
from the published plants however to reawaken interest in the whole series, 
and to engender some doubt of the correctness of my reference of Mr. Foster’s 
first material to C. Calif ornica. In order to determine if one or both of the 
forms here discussed, or i^ only one, which one might rightfully be called 
Cetraria Calif ornica Tuck, typical specimens of each were submitted to 
Dr. W. G. Farl-ow, of Harvard University, for comparison with Tuckerman’s 
original material. In response. Dr. Farlow writes : “ the Cetraria Calif ornica 
of Miss Cummings” (and this includes the Hasse and Zahlbruckner specimens) 
is what is called in Herb. Tuckerman var. sepincola. That on Finns contort a ’’ 
(the terete-compressed form of Mr. Foster’s first collection) “is really C. 
Calif ornica of Herb. Tuckerman,” and I will add of his description. During 
my early examination of Mr. F'oster’s first collection of C. Calif ornica vera 
according to Dr. Farlow's letter, the striking resemblance of the plants to 
Alectoria Oregana Tuck, furnished a matter for consideration. This simi- 
larity is noted in the often costate-channelled main stems of both and the 
similar manner in which the apothecia are borne. The apothecia of the 
form Tuckerman designates as his species as examined in numerous speci- 
mens are typically lateral and affixed in much the manner of Ramalina 
(Alectoria) gracilis Nyl. and appendiculate when only one occurs on a 
stem, or the uppermost when more than one is found. So dubious seemed 
any reference of the form to Cetraria as it has been studied of late, that 
an effort was made to allocate it with some of the published Alectoria 
species. Alectoria cetrariza Nyl. Lich. Freti Behringii p. 76, collected in 
Oregon on Finns contorta seemed from its description to agree very 
well with our plant, and as the cotype of the species presumably reposed 
in an American herbarium, confirmation of the suspected equivalency 
appeared to be within reach. Dr. J. W. Eckfeldt from whose hand Nylan- 
der received Alectoria cetrariza kindly compared specimens of Cetraria 
Calif ornica vera with his cotype, and pronounced them alike. Arguing 
that Nylander’s view of the generic affinity of the species is correct and 
that is my belief, a new combination becomes necessary for its designa- 
tion. It is proposed to salute the species as Alectoria Caltfornica (Tuck. 
Merrill comb. nov. Plate II. Fig. 6. 
With reference to what Tuckerman designated in herbarium as the 
var. sepincola of Cetraria Cahfornica, there is no reason to believe that 
it is in any way related with Alectoria Calif or nica as here constituted, 
either by descent or affinity, and certainly not anatomically. The thallns 
