CORNICULARIA. 



129 



American species. Some foreign 'species appear, in a slight 

 degree, to possess nutrient and demulcent properties, but 

 none have been used to any extent in medicine or the arts. 



2. Cornicularia ochroleuca (pchra, ochre, and Xeu/eo?, 

 white). Thallus ochroleucous or pale, terete-compressed, 

 sub-lacunose, divaricate-ramose ; extremities of the ramules 

 sub-fibrillose ; apothecia chestnut-coloured. 



Var. cincinnata ; thallus much branched, entangled, some- 

 what rigid, deeply ochroleucous ; extremities of ramules not 

 differing in colour. (E. B. 2040.) 



There is a rigid fruticulose form, in which the apices of 

 the ramules are reflexed and blackish; and it occurs also 

 in a pendulous filiform condition, growing on trees along 

 with TJsnea harbata. This species is alpine, and may be 

 met with, on the ground, on the summits of several of our 

 highest Highland mountains, such as Cairngorm. It is also 

 found in Europe as far north as the Arctic regions, for in- 

 stance on Ross's Islet. 



3. Cornicularia flavicans {flavus, bright yellow). 

 Thallus golden-yellow, terete-compressed or linear, divari- 

 cate-ramose, filiform, and fibrillose ; old thallus sometimes 

 becomes white and roughened by soredia ; apothecia orange- 

 coloured. (E. B. 2113.) 



K 



