320 L'Abbd E. Coemans on the Cladoniae 



nor in that of Florke. I am therefore unable to supply any 

 information concerning this problematical plant. 



35. Cladonia acicularis, (Ach.) Syn. p. 275 et hb. ejusd. 



This plant was generally regarded as belonging to C. maci- 

 lenta', but now there is no doubt that it ought to be referred 

 to the genus Pilophortis, and form the P. acicularis of Th. M. 

 I'ries. 



36. Cladonia aggregata, (Ach.) Syn. p. 275 et hb. ejusd. 



The Cladonia aggregata of Acharius and that of Florke are, 

 according to the herbaria of these authors, two entirely different 

 plants. That of Acharius is the true C. aggregata, Eschw. 

 Brasil. p. 278, and that of Florke the C. gorgonea of the same 

 author, Brasil. p. 271. 



The collection at Helsingfors contains only a miserable speci- 

 men of this species ; another specimen has been abstracted. 



37. Cladonia racemosa, (Ach.) Syn. p. 275 et hb. ejusd. 



Under this name is found, in the Acharian herbarium, the 

 large and robust form of C. furcata known under the name of 

 the var. racemosa, and also a specimen of C. pungens nivea, Flk., 

 from Guadeloupe. 



38. Cladonia furcata, Hffm., (Ach.) Syn. p. 276 et hb. ejusd. 



The Acharian specimens represent the ordinary type. The 

 var. suhulata is not distinguished in his herbarium, but is found 

 intermixed with other specimens. Many tufts of C. furcata 

 bear here also, some with a sign of doubt, some with that of 

 affirmation, the name of C, alcicornis, which proves that Acha- 

 rius entertained doubts, even to the end of his life, as to the true 

 characters of this species. 



39. Cladonia uncialis, Hffm., (Ach.) Syn. p'. 276 et hb. ejusd. 



Here is found the true C. uncialis, which Acharius had con- 

 founded before with C. amaurocraa. The var. adunca is scarcely 

 different from the type, and may therefore be erased. 



It must be remembered that the varieties dicrma and ohtusata 

 of C. oxyceras (Ach.) are referable to this species. 



40. Cladonia rangiferina, Hffm., (Ach.) Syn. p. 277 et hb. 



ejusd. 

 The first two varieties of Acharius, gigantea and cymosa, may 

 be suppressed; for both represent the type — the first as the 

 sterile form, the second as the fertile or spermogoniferous form. 

 The largest specimen of the form gigantea in the Acharian her- 

 barium measures 12 or 13 centiuietres in length. 



