12 LECANO-LECIDEKI [lECIDEA 



iodine. — Cromb. Lich. Brit. p. 64 ; Leight. Lich. Fl. p. 250 ; ed. 

 3, p. 241. Psora globifera Massal. Lich. Ric. p. 91 (1852) ; 

 Mudd I c. 



Differs from the preceding in tlic smaller, more ascending, shining 

 rugnlose thallus, and the more elevated, globose, often aggregate 

 apothecia.— According to Th. Fries (Lich. Scand. pp. 411, 412) the 

 squamules are rarely more or less white-suffused and the apothecia 

 usually violaceo-pruinose, neither of which characters are apparent 

 in the few, chiefly fragmentar3^, British specimens. 



Hab. On the ground in crevices of rocks in hilly and mountainous 

 regions. — Distr. Found only very sparingly in W. England, N. Wales, 

 S. Scotland, and on the S. Grampians. — B. M. Greeba Mt., Isle of 

 Man ; Dolgelly, Merioneth ; Arthur's Seat, Edinburgh ; Ben Lawers, 

 Perthshire. 



3. L. riibiformis Wahlenb. Fl. Lapp. p. 479 (1812). -Thallus 

 squamulose, imbricate, pale-sordid-brownish, white beneath (K — , 

 CaCl — ); squamules ascending, small, firm, subreniform, usually 

 white and crenate at the margins. Apothecia small, adnate, 

 convex, immarginate, often aggregate, blackish or slightly 

 feruginose-sufFused ; hypothecium pale-brownish ; paraphyses 

 concrete, reddish at the apices ; spores Snate, ellipsoid or oblong, 

 0,012-17 mm. long, 0,005-7 mm. thick; hymenial gelatine 

 bluish then sordid with iodine. — Carroll in Journ. Bot. iii. p. 289 

 (1865) ; Cromb. in Grevillea xxii. p. 9. L. globifera var. rubi- 

 formis Cromb. Lich. Brit. p. 64 (1870) ; Leight. Lich. Fl. p. 250 ; 

 ed. 3, p. 241. Bseomyces rubiformis Wahlenb. in Ach. Meth. p. 324, 

 t. 7. f. 5 (1803). Lichen rubiformis Sm. Engl. Bot. t. 2112 

 (1810). Lepidoma rubiformis S. F. Gray Nat. Arr. i. p. 461 

 (1821). Psora rubiformis Hook, in Sm. Engl. Fl. v. p. 193 

 (1833) ; the description " apothecia hollow, red " applies apparently 

 to a different species referable to Cladonia (cf Mudd Man. 

 p. 62). The specimen figured in Engl. Bot. is not among 

 Sower by 's plants ; and I am unable to find it in Smith's 

 herbarium at the Linnean Society. 



Intimately related to L. globifera, of which it is probably only a 

 variety, differing chiefly in the colour of the thallus and the slightly 

 larger spores. It is often caespitose with the squamules nearly erect 

 {fide Th. Fries Lich. Scand. p. 413 (1874)), which is not so distinctly 

 marked in our two small specimens. The constantly convex 

 apothecia are at length conglomerate, presenting, as Wahlenberg 

 says, the appearance of the fruit of Bubus ccesius. 



Hab. On the ground in crevices of rocks in an alpine situation. — 

 B. M. Ben Lawers, Perthshire. 



4. L. rhizobola Nyl. in Flora xlviii. p. 4 (1865). — Thallus 

 squamulose, appressed, chestnut-brown or lurid-brownish (K — , 

 CaCl — ) ; squamules rigid, rounded or rotundato-difform, crenate 

 at the margins, pale or whitish beneath, unequal, with long 

 central radicles. Apothecia moderate, convex, blackish, pale 

 within ; paraphyses not well discrete ; spores oblong-ellipsoid, 



