294 FLORA OP NEW ZEALAND. [Lichenes. 



the alpine continent of Europe, from the Pyrenees to Lapland; it occurs also in Britain, being, as Mr. Leighton in- 

 forms me, the Pertasaria figured at pi. xi. fig. 2 of his valuable work on the British Angiocarpous Lichens. I much 

 doubt if Thelotrema HutcHnsice, Borr., be anything different. This sp*eies passes into the genus Tlielotrema, as 

 Eries observes in his Summ. Veg. Scand. 



Gen. X. THELOTBEMA, Ach. 



1. Thelotrema lepadinum, Ach., Syn. Lick. p. 115. Fries, Inch. Eur. p. 428. 



Hab. Northern Island, common, Colenso, etc. 



In some of Mr. Colenso's specimens the crust is very thin. Occurs in Europe universally, the extreme north 

 excepted ; likewise in Arctic, North Temperate, and South Tropical America ; found also in Lord Auckland's Group 

 abundantly, and at Cape Horn. 



Gen. XI. GTALECTA, Ach. 



1. Gyalecta cupularis, Schser., Spicil.p. 79. Fries, Lick. Eur. p. 195. Lecidea marmorea,, Ach. Syn. 

 Lich. p. 46. Tayl. Lich. Antarct. n. 9. 



Hab. Northern Island; Bay of Islands, J. D. 11., fid. Taylor. 



I have not seen a New Zealand specimen; and a Lichen collected there by Dr. Hooker, and so named in Herb. 

 Hook, by Dr. Taylor, evidently belongs to P. gelida. 



Tribe II. LECIDINJE. 

 Gen. XII. STEEEOCATJLON, Ach. 



1. Stereocaulon ramulosum, Ach., Syn. Lich. p. 284. Swartz, Lich. Amer.p. 20. 1. 14 (bon.). Hook, 

 fil.! Fl. Antarct. pp. 196. 529. t. 80./. 1 (bon.). 



Var. /3. macrocarpum, Bab.; podetiis erectis elongatis subramosis granulalis, apotheciis majoribus 

 globoso-depressis lobulatis— S. macrocarpum, A.Rich., Fl. K Zel.p. 34. Voy. de I' Astrolabe, t. 9./. 4 {bon.). 



Yar. 7. compresmm, Bab. ; podetiis pumilis, fibrillis subfoliaceis plano-compressis densissime stipatis 

 ramosis snbtus pallidis, apotheciis convexis subimmarginatis. 



Hab. Apparently very common everywhere, on stones and earth, also on trees, Menzies and all travel- 

 lers. Yar. /3. Middle Island : Havre de l'Astrolabe, A. Richard. Port Nicholson, Lyall. A^ar. 7. Nor- 

 thern Island, Colenso. 



Occurring in America from Mexico (Galeotti !) to the Straits of Magellan, and, as it seems, running through 

 every parallel of latitude between them, but not found further south, according to Dr. Hooker. " In the Old World,'' 

 he adds, " it first appears in Bourbon, thence ranging from the Philippines through Java, Australia, the South Sea 

 Islands, Tasmania, and New Zealand, to Lord Auckland's Group and Campbell's Island ; abounding in rocky and 

 damp places, also on the trunks of large trees." Collected also at the Cape by Eraser, in the West Indies by Swartz, 

 and in the Himalaya Mountains by Winterbottom, growing at altitudes of 8,700 to 11,500 feet above the sea. A 

 variable plant it is, as may easily be supposed from its general occurrence ; and that, both as to the thickness of 

 its stems, the length of its fibres, its ramification, the size, shape, and position of its apothecia ; but I am not able 

 to agree with Dr. Hooker in thinking that S. corallimm may be one of its forms. The foveolated pale appendages 

 (cephalodia) almost always reveal the present species, and I fear that S. Argus, Hook. fil. et Tayl. !, is only a magni- 

 ficent form of it. Being unwilling to encumber these pages with a list of forms which are best learned by an inspec- 

 tion of numerous specimens, I have thought it necessary to mention only the chief varieties. — The best marked spe- 

 cimens of var. 8, from Dr. Lyall, are barren, but there is no sensible difference between the fruit of the type and 



