86 LICHENACEI. [CALICIUM. 



From other British species of the genus this is distinguished by the 

 oblongo-cylindrical gonidimia, similar to those of Coniocybe furfur acea. 

 The thalline squarniform granules are either somewhat scattered and 

 minute, or more crowded and larger. In this more developed state, 

 which is rare in Britain, the apothecia are usually less crowded, with the 

 stipes firmer and shorter. 



Hob. On the trunks of old trees and decaying pales (fir) in shady up- 

 land tracts. Distr. Only in one or two places in S. and N. England, S. 

 Scotland, and S.W. Ireland. B. M. : Menstrie, New Forest, Hants ; 

 Ingleby Park, Cleveland, Yorkshire. Binnie Woods, Haddingtonshire. 

 Tervoe, co. Limerick. 



Subsp. 1. C. cmerenm Nyl. ex Norrl. Medd. Soc. F. et Fl. Fenn. 

 (1876) p. 10. Thallus granulose, greyish or whitish. Apothecia 

 with the stipes often brownish and partly greyish-suffused, capitulum 

 beneath greyish or white-suffused ; spores 0,003-5 mm. in diameter. 

 Cromb. Grevillea, xv. p. 14. Calicium tnchiale var. cinereum 

 Nyl. ex Carroll, Journ. Bot. 1866, p. 22 ; Leight. Lich. Fl. p. 41 , 

 ed. 3, p. 40. Calicium cinereum Pers. Icon. (1799) p. 38, t. 14. 



This subspecies is distinguished by the more granulose thallus and the 

 differently coloured stipes. The apothecia are usually more scattered. 



Hab. On the bark of old oaks in wooded upland tracts. Distr. Only 

 in S. Ireland. B. M. : Deer Park, Castleniartyr, co. Cork. 



Subsp. 2. C. stemoneum Nyl. ex Norrl. Medd. Soe. F. et Fl. Fenn. 

 ( 1876) p. 10. Thallus thinnish, leprose, greyish- or greenish-yellow. 

 Apothecia black or brownish-black ; stipes short or elongate, dark- 

 brown ; capitulum grey-pruinose beneath, or nearly naked ; sporal 

 mass nmbrine or reddish-brown; spores as in the type. Cromb. 

 Grevillea, xv. p. 14. Calicium trichiale var. stemoneum Ach. Lich. 

 Univ. (1810) p. 243 ; Nyl. Syn. i. p. 150, t. v. f. 15 ; Miidd, Man. 

 p. 260 ; Cromb. Lich. Brit. p. 12 ; Leight. Lich. Fl. p. 41, ed. 3, 

 p. 40. Calicium ceruyinosum Turn. & Borr. Lich. Br. p. 156 ; Eng. 

 Bot. t. 2502; Sm. Eng. Fl. v. p. 141. Phacotium amginosiim 

 Gray, Nat. Arr. i. p. 484. Brit. Exs.: Leight. n. 227; Mudd, 

 n. 248. 



^Distinguished chiefly by the thin leprose thallus and the colour of the 

 stipes. The stipes is short and stout, or elongate and slender, accord- 

 ing to the habitat. The sterile plant may not be unfrequent in some 

 parts of England, but fertile specimens are rare. 



Hob. On the trunks of old trees, stumps and pales in shady lowland 

 and upland situations. Distr. Local and scarce in S., W., and N. Eng- 

 land. B. M. : Bury St. Edmunds, Suffolk ; Cuckfield, Sussex ; Kenwiek, 

 Worcestershire ; Bousdale Gill, Cleveland, Yorkshire. 



