in the Hookerian Herbarium at Kew, 107 



XV. Sheet inscribed ^' Cladonia cocciferaj varieties filiformis 

 and digitataj^ containing seven specimens. 



No. 1, two specimens, "Blackland Common, Henfield, Sus- 

 sex,^' K+ C— , = macilenta, Hoffm., f. clavata (Ach.). 



No. 2, two specimens, " Amberley wild brook, Sussex," K + 

 C — , = macilenta, Hoffm., i. polydactyla, Flk. 



No. 3, two specimens, " from Miss Hutchins, as Baomyces 

 macilentus," K + C — . Probably a state of macilenta, Hoffm. 



No. 4, " Sussex, Mr. Jenner,^' K+ C— , = macilenta, Hoffm., 

 i, polydactyla, Flk. 



In the following particularization of the general collection, 

 the localities have been placed under countries, which will enable 

 us to obtain an approximate notion of the geographical distribu- 

 tion of the species. 



The division of the genus Cladonia into three genera may be 

 objected to ; but as these are really natural groups, it seems 

 perfectly indifferent whether they be distinguished as genera or 

 sections. Practically the division will be found useful ; and, in 

 a philosophical sense, Cladina and Pycnothelia may be generically 

 separated upon quite as good grounds as J^vernia from Parmelia, 

 Coniocybe and Trachylia from Calicium, and even as Lecidea 

 from Lecanora, 



Tribe CLADONIEI, Nyl. 



I. Pycnothelia, Ach., Duf., Nyl. (K+ C-). 



1. P. papillaria, Hoffm. 



Britain: — Appin (very fine) (Capt. Carmichael), Ben Nevis 

 (Sir W. J. Hooker), Killarney (Miss Hutchins), Hill above Loch 

 Callater (A. Croall). 



Europe: — Vosges (Dr. Mougeot), B. de Bigorre (Mr. R. 

 Spruce). 



II. Cladonia, Nyl. 



A. Phaocarpa, 



* Reaction (Kf+ C + ). 



1. C, endiviafolia, Fr. (K f + C + ). 



Britain : — Carse of Ardersier (A. Croall). 



Europe: — Vosges (Dr. Mougeot), near Volterra, Italy (Sir 

 W. J. Hooker), Switzerland (Seringe), Spain (Dr. Romer), 

 Landes de TAndalousie en Espagne (Hb. E. I. C), S. de Ara- 

 bida, Portugal (Welwitsch), Sierra de Chiva in decliv. sept, 

 mont. la Casaleta (Sir W. J. Hooker), Gryphiae. 



Africa : — Algeria (Bove), Canaries (Dr. Leman). 



8* 



