KUOrSIS.] PTREN0P8ET. 23 



Lich. Fl. cd. 3, p. 15. Collema hcemaleum, Somm. Suppl, Fl. Lapp. 

 (1826) p. 117. 



The thallus occasionally occurs in small patches intermixed with other 

 crustaceous lichens, but irenerally by itself, and spreading to a moderate 

 extent over the substratum. Sometimes a sterile and less developed, 

 though very similar, plant occurs which probably belongs to this species. 

 The apothecia are usually numerous and crowded, becoming when old 

 convex and darker in colour. 



Hrib. On mica-schist rocks in subalpine and alpine tracts. — 

 Dhtr. Local and scarce amimg the S.W. Grampians, Scotland and 

 in N.W. Ireland. — B. M. : Ben Cruachan, Argyleshire ; Ben Lawers, 

 Perthshire. Connemara, co. Galway. 



2. E. granatina Xyl. Flora, 1875, p. 363.— Thallus effuse, thin, 

 granulose, rimoso-diffract, reddish-brown or nibricoso-reddish, the 

 granules somewhat plane, opaque, ruguloso-nodulose, contiguous, 

 rotundato-difform. Apothecia small, shining, several in each thalline 

 granule, subconcolorous, whitish within, the margin thin, entire ; 

 spores simple or spuriously 1-septate, 0,009-12 mm. long, 0,0045- 

 55 mm. thick ; hymenial gelatine, especially the thecte, bluish with 

 iodine. — Cromb. Grevillea, xv. p. 10. — Pt/renopsis granatina Xyl , 

 ex' Cromb. Lich. Brit. p. 2 : Leight. Lich. Fl. p. 14, ed. 3, p. 15. 

 Lecanora granatina Somm. Suppl. Fl. Lapp. (1826) p. 90. 



Distinguished from the preceding by the paler colour of the thallus, the 

 nodulose and irregularly rotundate gi-anules, and the apothecia. In manner 

 of growth it is similar to Pyrenopsis hcpmatopi--), and is little conspicuous 

 except in wet weather. The apothecia become at length nearlv biatorine, 

 with excluded margin. 



Hab. On granitic rocks and schistose boulders in alpine localities. — 

 JDistr. Very local and rare among the mountains of X. Wales and the 

 S. and W. Grampians, Scotland. — B. M. : Llyn Aran, near Dolgellv, 

 Merionethshire. Ben Cruachan, Argyleshire ; Craig CaUiach and" Ben 

 Lawers, Perthshire. 



4. PYRENOPSIS Xvl. Mem. Soc. Cherb. iii. (1855) p. 164; 

 Syn. i. p. 97 (cf>: Stiz. St. Gall. Xat. Ges. 1876, p. 193).— Thallus 

 thinly crustaceous, granulose or subsquamulose, rarely subfruticulose; 

 gonimia simx^le or several in nodulose syngonimia. Apothecia sub- 

 lecanoroid or pseudo-pyrenocarpous, smaU or minute, paraphyses 

 simple, slender ; spores Snse, very rarely numerous ; hymenial 

 gelatine bluish or wine-red with iodine. Spermogones with oblong 

 minute spermatia. 



As re-arranged by Xylander, this is a very natural and well-defined 

 genus, in consequence of PJuopsis having been raised into a separate genus 

 and CoUemopsis relegated to the Collemacei. It is at once distingiushed 

 from Euopsi-s by having the disc of the apothecia subclosed, and bv the 

 paraphyses not being articulate. More recently it has been divided by 

 Xylander into two subgenera, viz. Eupyrenopsis Xyl. and Cladopsis Xyl., 

 of which only the former occurs in this country. 



1. P. haematopis Fr. fil. X^. Ac. Eeg. Soc. So. Upsal. ser. 3, iii. 

 (1861) p. 284. — Thallus effuse, crustose, opaque, verrucoso-unequal, 



