228 PROCEEDINGS OF THE AMERICAN ACADEMY 



It appears therefore likely, the general agreement between these plants 

 beino- undeniable, that they express only conditions of the same species. 



Thelotrema leucomelanum, Nyl. — Trunks, Oahu (Mann). 



Thelotrema Bahianum, Ach. — Trunks, mountain of "West 

 Maui, and Oahu (Mann). 



Thelotrema Auberianum, Mont. — Trunks, Oahu (Mann). 



Thelotrema lepadodes, Tuck. — Trees, Oahu (Mann.) 



Trib. II. Lecideacei, Fr. 

 Fam. 1. Cladomei. 



Stereocaulon ramulosum (Sw.) Ach., f. proxlmum. «S'. proxi- 

 mum, Nyl. — Walls of crater. East Maui (Pickering), Tuck. 1. c. ; 

 Kaala Mountains, Oahu (Mann). — The greater or less elongation 

 of the nodules in the gonimous layer of the cephalodia scarcely af- 

 fords a satisfactory difference. 



Stereocaulon mixtum, Nyl. — Hawaiian Islands (Gaud.), Nyl. 

 1. c. ; mountains of Oahu (Andersson), Th. Fr. — The series of forms, 

 — including the East Indian S. piluUferum, Th. Fr., the oldest and 

 most significant name, — brought together here by Dr. Nylander, has 

 been shown by him to be marked by a curious difference in the struc- 

 ture of the gonimous layer of the cephalodia. In other respects there 

 is little to distinguish these forms from S. ramulosum ; and even the 

 dwarfed and otherwise noticeable lichen of the Himmalayah (Herb. 

 Hook. ; Hook. & Thorns, herb. Ind. Or.) well compares with a simi- 

 larly small condition (Oahu, Mann ; comp. S. claviceps, Th. Fr., Nyl.) 

 of the latter. 



Stereocaulon pilophoroides. Tuck. — Hawaiian Islands (Hil- 

 lebrand). 



Cladonia pyxidata (L.) Fr. — East Maui (Pickering), Tuck. 1. c. 



Cladonia gracilis, var. elongata, Fr. — Mauna Loa, Hawaii 

 (Pickering), Tuck. 1. c. 



Cladonia fimbriata (L.) Hoffm. — Hawaii (Pickering), Tuck. 1. 

 c. Var. adspersa. Tuck. — Hawaii (Mann). 



Cladonia furcata (Schreb.) Fr. — Hawaii (Pickering), Tuck. 

 1. c. ; Waialua Mountains, Oahu (Mann). 



Cladonia squamosa, Hoffm. — Hawaii (Pickering), Tuck. 1. c. 



Cladonia rangiferina (L.) Hoffm. — Hawaiian Islands, Nyl. ; 

 Mauna Loa, Haivaii, and Kaala Mountains, Oahu (Pickering), Tuck. 

 1. c. ; Mountain of West Maui, etc. (Mann). 



