OF GEE AT BRITAIN. 15 



5-15 in each thalline squamule; epithecium punctiform, conco- 

 lorous, with thalline margin; spores 8, oblongo-ellipsoid ; para- 

 physes few, slender; gelatina hymenea I. bluish, and thecse dark- 

 violet. 



On quatzose boulders in sub-alpine streams, rare. 1870. 



Syn r- Nyl. in Flora. 1875 p. 102. 



Bot. Pkov : -15. 



Scotland :— Ben-y-gloe, Blair Athole. Rev. J: M. Crombie. (1870). 



" Nearly allied toPt. Tasmanica, Nyl. Spores .005—7 mm. long, about .003 

 broad. Thalline squamules composed of minute coalescent granules. Sper- 

 matia slender, oblong or fusiform-oblong" (Nyl.) 



7. P. hwmalea, (Smrft) fuscescenti-rufmcs, crustceform, diffracto- 

 rimose, granulato-rugose ; apothecia very much . crowded, innate, 

 plano-convex, shining, nigrescent, when moist olivaceo-fuscescent, 

 thalline margin crenate, at length excluded. 



On alpine rocks, rare. 1871. 



Syn i-Collema hasmaleum, Smrft. Lapp. 117.(1826.) Stirton in Grevillea 

 2. 71. 

 Geog. Distrib :— Scandinavia. 

 Bot. Pkov :— 15. 26. 



Scotland :— Ben Lawers. Dr. Stirton (1871). 

 Ireland : — Doughruagh mountain, Galway. Mr. Lwrbalestier. 



8. P. granatina, (Smrft.) fusco-rufescent, tartar eous, effuse, 

 rimoso-diffract, granulose, granules rugoso-nodulose, somewhat plane, 

 opake, often contiguous, rotundato-difFormed ; apothecia minute, 

 numerous in each thalline granule, internally whitish, reddish, 

 shining, margin thin, entire, whitish ; spores 8, colourless, ellip- 

 soid, simple, or spuriously 1 -septate ; gelatina hymenea and 

 thecse blue with iodine. 



On mountain rocks, very rare. 1865. 



Syn :— Smrft. Lapp. 90. (1826). Nyl. Lapp. or. 104. Crombie En. 2. 

 Exs :— Fellm. 4. 



Geog. Distbib :— Russia, Lapland. 

 Bot. Pkov :— 7, 15. 



Scotland : — Ben Cruachan in Breadalbane. Rev. J. M. Crombie. (1865). Ben 

 Lawers. Dr. Soil. 

 Wales : — Cader Idris. Dr. Boll. 

 " Spores .009 -.012mm. long, .0045— .0055 mm. broad." (Nyl.) 



III. COLLEMA. Ach. Nyl. * 



Thallus veiy various, granula gonima moniliform, no distinct 

 cortical layer. Apothecia rufescent, lecanorine. Spores 8, simple 

 or variously divided, septate and murali-locular. 



* Spores unknown. 



1. G. lichinodeum, Nyl. fuscous-black, lineari-laciniose, lacinice 

 ligulate, 2-3-divided, apices obtuse, internally almost as in Ephebe 

 but with small brown moniliform gonima ; apothecia unknown. 



On decaying mosses on alpine rocks, rare. 1865. 



* In this senus and Leptogium I have entirely followed the ;i rangement of Dr. 

 Nylander and Mr. Crombie m Journ. Bot. (1874), 



