Lichenes^] 



FLORA OF NEW ZEALAND. 



295 



tins form ; their size is variable. Among- the granulations the fibres are not uncommonly scattered. Dr. Montague 

 has rightly reduced this form to 8. ramulosum (Toy. P61e Sud, p. 178).— Var. y is from one to two inches high; it 

 is a different-looking plant from the type, but has the cephalodia proper to the species. 



2. Stereocaulon Colensoi, Bab. ; thallo horizontali granuloso disperso (evanescente ?), podetiis stipa- 

 tissimis rigidis validis basi coalitis superne albidis corrugatis inferne fulvescentibus, fertilibus fibrillis rigidis 

 verrucisque usque ad medium vestitis, superne nudis bi-trifurcatis, apotheciis in racemos laterales et termi- 

 nales congestis junioribus clausis purpureis disco demum explanato amplo piano atropurpureo, excipulo 

 tenui flexuoso subtus cormgato, cephalodiis subcseruleis irregularibus subpyriformibus congestis coalitis 

 corrugatis rugis anastomosantibus. (Tab. CXXX. A.) 

 Hab. Northern Island, on rock, Colenso. 



An extremely handsome Lichen, and, so far as I can judge from somewhat scanty materials, a distinct species. 

 It is allied to the preceding, but a much stiffer and stronger plant (more so than even 8. Argus, Hook. fil. et Tayl. !) 

 and bearing very different cephalodia. The fertile podetia, even when young, are almost entirely void of fibres on 

 their upper half, but a barren specimen is clothed with thick rigid fibres and warts up to the summit. The young 

 densely-clustered apothecia are very like a miniature bunch of purple grapes, whence Mr. Colenso suggested the 

 name of 8. bolrys, which, however, cannot well be retained, as there is already a 8. botryosum, Ach. The adult apo- 

 thecia resemble 8. Argus. -Plate CXXX. A. Figs. 1, 2, and S, different forms of 8. Colensoi, natural size; 4, 

 branch of thallus, with cephalodia; 5, vertical section of cephalodium ; 6 and 7, ditto of apothecium -.-all highly 



3. Stereocaulon denudatum, Morke, Fries, Lick Mir. p. 204. 



Hab. Northern Island, Colenso. 



Specimens barren, but safely referable to this species. A common plant in the northern hemisphere, ranging 

 from the Canary Islands and the Pyrenees to Lapland in the Old World, and from Mexico to Greenland in the 

 New; it occurs also at Cape Horn, in the southern hemisphere. 



Gen. XIII. CLADONIA, Hoffm. 



An extensive genus, found all over the world, whose species are not easily limited. 



§ 1. Granulosa, Fries, Summ. Veg. Scand. p. 111. Oladonia, Sect. II., Fries, Lich. Eur. p. 242.— Horizontal 

 thallus often evanescent (or altogether wanting?). Podetia branched, naked, not cup-bearing, neither gra- 

 nular nor squamulose nor pulverulent. 



1. Cladonia retipora, Morke, Comment, de Cladon. p. 181. Mont. Toy. cm Pole Sud, p. 177. Ceno- 

 myce retipora, Ach. Syn. Lich. p. 248. Bseomyces retiporus, Laiill. PI. N. LLoll v 2 p 110 t 254 



/•2, 



Hab. Northern and Middle Islands, common, generally on the ground in large patches, more rarely 

 on rooks and trees, Cunningham, llaoul, Lyatt, etc. 



This noble species is also found in Tasmania and Australia. 



2. Cladonia aggregate, Eschw., in Mart. PI. Brasil. v. I. p. 278 [non Flor/ce). Mont. Voy. an Pole 

 Sud, p. 176 {cum syn.). Hook. PI. Antarct. pp. 1 97 el 532. 1. 80./. 2. Cenomyce aggregata, Swartz, Lich. 

 Amer.p. 17. t. 12. Ach. Syn. Lich. p. 275. Dufourea collodes, Tayl.! Lich. Antarct. n. 102. 



Hab. Abundant in the Northern and Middle Islands, Cunningham, llaoul, etc. 



See Eschweiler (as above) for an excellent description, Montagne for other synonyms, and Hooker for the geo- 

 graphical distribution (adding the West Indies to the habitats) and good figures. 



