CLASSIFICATION 263 



jecting much beyond the basidia when a portion of a gill is seen 

 in section under the microscope. 



Key to the Species 

 A. Spores rough. 



* Cystidia present. 



f Stem whitish or very pale. 



\\ Stem coloured. 



** Cystidia absent. 



f Stem whitish or very pale. 



ft Stem coloured. 



B. Spores smooth. 



* Cystidia present. 



I Stem whitish or very pale. 



ft Stem coloured. 



** Cystidia absent. 



■f Stem whitish or very pale. 



ft Stem coloured. 



A. Spores rough. 



* Cystidia present. 



f Stem whitish or very pale. 



I. fibrosa. — Cap bell-shaped, then expanded and gibbous, silky, 

 whitish to pale yellowish brown, edge cracking, 2-4 in. across ; gills 

 nearly free, dingy ochre ; stem stout, narrowed and floccose upwards, 

 whitish, 3-4 in. long (spores irregularly oblong, shghtly warted, 

 10-12 X7-7'5 /A ; cystidia ventricose). 



A fine, large species. Differs from /. perlata in having warted 

 spores. 



On the ground in pine woods. 



I. asterospora. — Cap bell-shaped, then expanded and umbonate, 

 even and almost smooth, becoming cracked and fibrous, brownish 

 to dingy cinnamon, 1-2 in. across ; gills emarginate, dingy cinna- 

 mon ; stem cylindrical, minutely bulbous, almost smooth, becoming 

 tinged red and streaked with brown fibrils, 2-3 in. long (spores 

 stellately nodulose, 10-13 ju diam., cystidia ventricose). 



This species was for a long time confounded with /. rimosa, 

 which differs in having smooth spores. I. margaritispora differs in 

 having no cystidia. 



On the ground in woods. 



/. trechispora. — Cap convex, soon almost plane and umbonate, 

 viscid at first, then dry and silky, pallid or whitish, umbo often 

 tinged ochre, up to i in. across ; gills whitish, then greyish cinna- 

 mon ; stem pallid, often slightly wavy, with a mass of white 



