Howe: American Species of Alectoria 



113 



" compressed-terete is scarcely applicable to any condition shown " 

 in his specimens of the above exsiccati ; (3) that the above exsic- 

 cati specimens are represented in the " Herb. Tuckerman " as 

 "var. sepincola" ; (4) that the " terete-compressed form" sent 

 him by Mr. A. S. Foster " is really C. calif ornica of Herb. Tuck- 

 erman," fide Farlow; (5) that in Tuckerman's species the apo- 

 thecia are " typically lateral and affixed in much the same manner 

 of Ramalina {Alectoria) gracilis Nyl. and appendiculate when 

 only one occurs on a stem," etc. ; (6) that Nylander's Alectoria 

 cetrariza of Eckfeldt is the same plant; (7) that accepting 

 Nylander's view of the generic affinity he proposes the new com- 

 bination Alectoria calif ornica (Tuck.) Merrill; (8) that Cetra- 

 ria calif ornica var. sepincola of the Tuckerman herbarium is not 

 "related with Alectoria calif ornica" (Tuck.) Merrill; (9) that in 

 the latter plant the thallus is " cylindrical, radial in structure, the 

 apothecia lateral with a commonly entire and smooth margin " ; 

 and (10) that Cetraria calif ornica Tuck, as represented in the 

 published exsiccati is still undescribed. 



We now have, I believe, all the published facts for our con- 

 sideration. There seems no doubt that Tuckerman fully con- 

 sidered the affinities of the plant . he described, and that now 

 reposes in his herbarium. For twenty-three years he found noth- 

 ing to cause him to change his original distribution. He never- 

 theless noticed an affinity with the bilocular-spored Ramalinas as 

 well as the Cetrarias. 



Nylander, until he received Dr. Eckfeldt's plant, agreed doubt- 

 fully with Tuckerman, and in naming the former's plant showed 

 that he realized a Cetrarian affinity by the choice of a specific 

 name. 



Dr. Eckfeldt simply proclaimed the work of Nylander, enclos- 

 ing without reason Nylander's own name in parenthesis. 



As it seems probable that the exsiccati distributions were of 

 an unnamed species or variety erroneously determined, we may 

 drop them for the present from our consideration (see pi. 41). 



Mr. Merrill calls attention to a similarity with Ramalina 

 gracilis Nyl., and refers also to a similarity with Alectoria 

 oregana Nyl. ex Tuck. 



Now, to return to Tuckerman's interpretation of the plant's 



