(149) 
Southern States, at least south of Virginia, and Mr. Wright found it in 
“stony pine woods” in Cuba (Lich. Cub. n. 44). 
Thamnotlia(Ach.) Scher. Enum. p. 243, (Cladonia vermicularis, Auctt.) 
is accepted as a distinct generical type by Nylander (Syn. p. 263, t. 8, f. 6) 
and its place in the system is, according to him, immediately after Siphula,. 
in his series Ramalodei. It is yet impossible for me to regard this lichen 
as anything but Cladonieine, to say the least; and the f. taurica occurs 
in our mountains (as also in Sweden, as compare Th. Fr. Lich. Arct. p. 
162, where the same view is maintained) so exactly similar to subulate 
podetia of Cladonia gracilis, intermingled with which it often grows, in 
everything but colour, that without ocular evidence of diversity, I must 
decline to separate it. The extreme infrequency of the described sper- 
mogones, which, so far as appears, only one lichenographer (Nyl. 1. c.) has 
fully examined, detracts from the value of this note. The described 
apothecia have only been seen twice: in the first instance these differed 
‘neither in external nor internal structure’ from those of Cladonia (Th. 
Fr. 1. c.) and in the second (Mass. in Flora, 1856, n. 15) the internal parts 
were sufficiently Cladoniine, however irregular (‘abnormia,’ Mass.) the 
receptacles. Schwendener (Untersuch. 1.c.2, p.167) finally, has compared 
at length the thalline structure of Cladonia with that of Thamnolia: 
but the whole of his argument for the separation of the latter may be 
said to turn on the continuity of its cortical layer; and the value of this 
fact in the system, is by no means determinable by its anatomical interest. 
Fam. 2.—CHNOGONIEI. 
Thallus horizontalis, conferveo-filamentosus. 
XL.—C@NOGONIUM, Ehbrenb. 
Ehrenb. in Hor. Phys. Berol. Fée Ess. p. 78; Suppl. p. 134. Fr. 8S. 0. 
V.p.301. Mont. Pl. Cell. Cub. p.107; Syll. p. 381. Nyl. Enum. Gén. 
l. c. p. 119; Obs. sur les Coenog. in Ann. Se. Nat. 4, 16, p. 89, t. 12. 
Karsten Geschlechtsl. d. Pflanz. p. 42. Schwend. in Flora, 1862, p. 
225; Untersuch. in Naeg. Beitr. 4, p. 172, t. 23, f. 18-21. De Bary 
Morph. & Phys. d. Pilze, &c., p. 270. 
Apothecia patelleformia, excipulo proprio pallido. Spore ex 
ellipsoideo subfusiformes, seepius biloculares, incolores. Spermatia 
fusiformia ; sterigmatibus simplicibus. Thallus e filamentis articu- 
latis in telam subdeterminatam viridulam intertextis. 
