144 LICHEN ACEI. [CLADOHIA. 



15. C. cervicornis Schfer. Enum. (1850) p. 195. — Thallus foliaceo- 

 squamulose at the base ; leaflets large, laciniiform, crenate or inciso- 

 creuate, or variously multifid, ascending, firm, dark olive-green or 

 glaucous-green above, whitish or brownish-black beneath ; podetia 

 short, smooth or subverrucose, scyphiferous ; scyphi simple or irre- 

 gularly proliferous, more or less squamulose (K-f- yellowish, CaCl — ). 

 Apothocia small, sessile, brownish-black. — Mudd, Brit. Clad. p. 4 ; 

 Leight. Lich. Fl. p. 57, ed. 3, p. 54. — Cladonia gracilis subsp. cervi- 

 cornis Mudd, Man. p. 54 ; Cromb. Lich. Brit. p. 19. Scyphoplionis 

 cervicornis Sm. Eng. Fl. v."p. 242 ; Tayl. in Mack. Fl. Hib. ii. p. 81. 

 Lichen cervicornis Ach. Prodr. (1798) p. 184, Eng. Bot. t. 2574. 

 Corcdloides sci/jihiforme, foliis alcicomiformihus cartilaginasis Dill. 

 Muse. 87, t. 14. f." 12 B. 



Though generally resembling less proliferous states of the preceding 

 species, this diifers in the more developed lacinise, the shorter podetia, 

 and in the chemical reaction with K. The thallus at the base is densely 

 cfespitose, with the leaflets nearly erect, somewhat thickened, in old 

 plants rimoso-reticulate above and the podetia are often but little deve- 

 loped, or entirely wanting (form basima Cromb.). The apothecia are 

 sessile on the margins of the scyphi, and are either simple or conglo- 

 merate, becoming blackish in age. 



Hah. On the gi'ound among rocks and on heaths in maritime and 

 upland regions. — Distr. General and usually plentiful in hilly and moun- 

 tainous tracts of Great Britain and probably also of Ireland ; rare in the 

 Channel Islands. — B. M. : Quenvais, Island of Jersey ; Pleinmont, Guern- 

 sey. Busthall Common, Kent ; Hay Tor, Dartmoor, and Bolt Head, 

 Devonshire ; Withiel and Penzance, Cornwall ; Bathampton, Somerset- 

 shire ; Worcester Beacon, Worcestershire ; Buxton, Derbyshire ; Rhew- 

 greidden, Merionethshire ; Llanberis, Cardiganshire ; Island of Anglesea ; 

 Teesdale, Durham. New Galloway, Kirkcudbrightshire ; Moft'at, Dum- 

 friesshire ; Pentland Hills, near Edinburgh ; Appin, Argyleshire ; The 

 Trossachs, Rannoch, and Craig Calliach, Perthshire ; Lion's Face and Ben- 

 naboord, Braemar, Aberdeenshire ; Glen Nevis, Inverness-shire ; near 

 Lairg, Sutherlandshii'e ; hills of Applecross, Ross-shire. Carig Mt. and 

 KiUarney, co. Kerry ; Kylemore, co. Galway. 



Form stipata Nyl. Flora, 1876, p. 239. — Squamules at the base 

 elongate, sublinear, crenato-incised and deeply divided, erect, stipate ; 

 podetia and apothecia as in the type. — Cromb. Journ. Bot. 1876, 

 p. 360 ; Leight. Lich. Fl. ed. 3, p. 55. 



Differs only in the basal thallus. The podetia and apothecia veiy 

 rarely occur. 



JIah. On the ground among rocks in upland districts.— jD/s!"/-. Rare 

 and local in N. Wales, the Central Grampians and the N.W. Highlands, 

 Scotland, and in N.W. Ireland (Kylemore, co. Galway). — B. M. : Aber- 

 dovey, Merionethshire. Loch Eagh, Rannoch, Perthshire ; hills of Apple- 

 cross, Ross-shire. 



16. C. sobolifera Nyl. Flora, 1873, p. 66 ; Not. Sallsk. pro F. et 

 Fl. Fenn. Foih. n. s. v. (1866) p. 176 (note).-^Thallus foliaceons 

 at the base ; leaflets somewhat narrow, inciso-crenate, ca?spitose, 



