LICHENES HIMALAYENSES. 247 
cunose, dark, rufescent, and the fibres on the whole darker, margins 
decidedly tomentose ; it appears to belong to the present species rather 
than to P. rufescens, if indeed the latter be distinct. 
ll. Sticta pulmonacea, Ach. Var. hypomela, Delise, Stict. p. 144. 
. fig. 64. 
Has. Chinar, Kumaon, alt. 8700 feet; growing over sticks; fertile. 
(Coll. n. 10.) 
Tomentose below ; down bluish-black towards the edges of the lobes, 
paler in most other parts; apothecia rufous, becoming darker by age. 
12. Sticta retigera, Ach. 
Has. Dugli, Kumaon, alt. 10,500 feet; growing upon sticks, and 
over mosses (thallus very deeply scrobiculated, becoming dark, some- 
what polished, much bullated below, down mostly of a metallic deep 
violet-black) ; also at Chinar, Kumaon, 8700 feet (thallus much less 
scrobiculated, sorediated on the ridges, paler, less bullated below ; 
down for the most part of a much less deep black; about the centre 
of a dull blackish-brown) ; barren in both localities. (Coll. n. 9.) 
The form from Chinar connects this species so called with the var. 
hypomela of S. pulmonacea, Ach. It is easy to select well-marked ex- 
amples of S. pulmonacea, linita, and retigera, which appear distinct 
enough, but other intermediate specimens prove them to be states of 
one polymorphous species. S. retigera in its normal form does not 
appear to wander far from the tropics of the old world; being found a 
little north of them in India, and a little within them in Bourbon and 
the Mauritius; I have however a Scotch specimen of S. pulmonacea so 
dark below that it might almost be called 5. retigera. 
13. Sticta erbacea, Delise. (Parmelia h., Ach.) 
. Has. Chinar, Kumaon, alt. 8700 feet; Kurim Pass, Kumaon, alt. 
7500 feet; Kathi Pass, Kumaon, alt. 8000 feet; on bark; fertile in © 
each locality. (Coll. n. 20, and Coll. n. 15 pr. pj ; 
14. Parmelia (Imbricaria) tiliacea, Ach. — 
Has. Chinar, Kumaon, alt. 8700 feet; fertile and large. Madhari 
Pass, Kumaon, alt. 8200 feet; on rock, fertile (smooth form = P. scor- z 
tea, Ach. (Coll. n. 19, and no. 15 pr. p-) 
15. Parmelia perforata, Ach. : em 
` Has. Chinar, Kumaon, alt. 8700 feet; on bark; fertile (adult - 
apothecia perforate and imperforate on the same specimen); Gori River, — — 
Kumaon, alt, 4700 feet; barren. (Coll. n. 14 dis and n. 16.) 
