150 CRYPTOGAMIA--FUNGL 



colour, externally very pubescent and rough ; aperture circular, 

 close when dry. Bot. Gall. ii. 746. 



Nab. On decayed and decorticated branches of a willow in 

 Longridge Dean. Spring. 



This pretty species grows densely clustered, and opens only 

 in moist weather. When the aperture is closed, the plant 

 so closely resembles the Tricliia faginea hereafter de- 

 scribed, that it it is difficult to point out a difference. 

 Height \ line ; summit pale. 



11. P. hydnoides, gregarious, minute, globular, externally 

 densely pubescent, yellowish green ; aperture circular, contract- 

 ed; disk black Sow. Fung. t. 178. 



Hob. On decayed stumps of trees in the dean at the Pease- 

 bridge. Autumn. 



A minute but remarkably neat species, resembling an Echinus 

 in miniature. 



12. P. plumbea, gregarious, minute, subglobular or cupped, ex- 

 ternally villose, brownish-olive; disk bluish-grey; diameter 1 

 line. GREV. Crypt. Fl t. 11. 



Hab. On decayed wood in moist places, rare. 



* * * Stalked and smooth. 



13. P. faginea, small, milk white ; stalk short ; head circular, 

 plane or slightly convex, with an even margin PERS. Syn. 664. 



Hab* On decayed twigs and straws in damp woods, plen- 

 tiful in autumn. 



The stalk is scarcely a line long, rather thick ; the disk 

 abrupt, |th in diameter, never cupped, fleshy. Allied to 

 P. fructigena, but perfectly distinct. 



14. P. citrina, gregarious, small, yellow; stalk very short, 

 thickish ; head circular, slightly cupped, becoming plane, with an 

 even or obscurely waved margin. PERS. Syn* 663. Gnw.'Fl. 

 JEdin. 424. P. aurea, Sow. Fung. t. 150. 



Hab. On the sawn stumps of trees in woods, abundant in 

 autumn. 



