Murrill: Agaricaceae of Tropical North America 81 



nately, decayed when the plants were found. However, there are 

 large patches on the surface of the pileus which indicate that most 

 of the volva was carried up by it in developing, leaving very little 

 at the base. No attempt is made to cite here the synonyms of 

 this species. 



3. Limacella Earle, Bull. N. Y. Bot. Gard. 5 : 447. 1909 

 This genus differs from Lepiota chiefly in having a smooth, 



viscid pileus instead of a dry and scaly one, as is well illustrated 

 in one of the best known species, L. illinita. 



Limacella agricola sp. nov. 



Pileus convex, regular, rather firm for the genus, 2.5 cm. broad ; 

 surface smooth, glabrous, slimy, white, with incurved, striate 

 margin; lamellae free, white, broad, unequal; spores subglobose, 

 smooth, pure hyaline, often uninucleate, 4-5 /x long; stipe cylin- 

 dric, even, white, glabrous, shining, slightly bulbous at the base, 

 2.5 cm. long, 2 mm. thick ; annulus superior, slight, evanescent. 



Type collected on the lawn at Constant Spring Hotel, near 

 Kingston, Jamaica, December 20, 1909, W. A. & Edna L. Murrill. 



4. Lepiota (P. Browne) S. F. Gray, Nat. Arr. Brit. PL 1: 



601. 1821 



This genus is based on the well-known " parasol mushroom " 

 of temperate regions, Lepiota proccra. The species seem well 

 adapted to tropical conditions, possibly owing to their loose tex- 

 ture and their choice of humus or well-drained locations. For 

 present purposes, the various genera recognized by Earle, Cysto- 

 derma, Fusispora, Mastocephalus, and Lepiota, are all kept to- 

 gether. The following artificial grouping of the species here 

 treated is given for the convenience of the student : 



Pileus small, 3 cm. or less broad. 



Pileus white or whitish, the umbo usually differently colored. 1-5. 



Pileus some shade of red. 6-7. 



Pileus some shade of gray or brown. 8-1 1. 

 Pileus medium or large, 4 cm. or more broad. 



Pileus white or yellowish, the umbo often differently colored. 12-17. 



Pileus some shade of red. 18. 



Pileus brown. 19. 



i. Lepiota lactea sp. nov. 



Pileus thin, convex, slightly umbonate, solitary, 1— 1.5 cm. 

 broad; surface white, smooth, slightly silky, especially near the 



