REVISIONS OF CEYLON FUNGI. 375 



Pile US 3 to 9 cm. diameter ; at first campanulat«, then 

 expanded, tiie outer half usually horizontal, the remainder 

 deeply depressed but obtusely umbonate in the centre ; the 

 horizontal margin regularly tuberculato-sulcate, brown or 

 blackish brown, the depressed area glabrous, light brown, 

 and the umbo dark brown ; sometimes wholly purple gray or 

 French gray ; sometimes split almost to the centre ; viscid 

 when moist ; flesh white, extremely thin except in the centre. 



Stalk 10 to 18 cm. high, usually strongly attenuated 

 upwards, 9 to 12 mm. diameter at the base, 4 to 5 mm. at the 

 apex, rarely almost equal, Hlac gray, purple gray or brownish, 

 clothed witli adyjressed fibrils, the outer layers splitting 

 irregularly and displaying transverse irregular white bands, 

 but not forming scales, white at the base, brittle, hollow, 

 stuffed with white shining fibres. 



Volva white, narrow, loosely sheathing the stem, substance 

 loose and rather thick, lobed, up to 3' 5 cm. high, pointed 

 below. Some specimens have an inner collar encircling the 

 base of the stem within the volva. 



Gills white, free but reaching almost to the stem, rather 

 narrow, attenuated at either end or slightly rounded outwards, 

 rather crowded ; interstices veined. Spores white, globose, 

 with a large apiculus, 10-12 a* diameter. 



Thwaites' specimen No. 777 which was named A. vaginatus 

 by Berkeley and Broome is uniformly purple gray ; the stalk is 

 more equal and shorter than usual, and the outer layer is not 

 split. This form is rather rare. The common form was sent 

 to Berkeley and Broome minus the volva (Thwaites' 703) , and it 

 differed so much from the unicoloured example that they did 

 not realize the relationship, but named it Collyhia etidochorda. 

 The painting of this shows the usual depressed centre and 

 horizontal margin of the pileus, the former light brown and the 

 latter blackish-brown, the change of colour occurring abruptly 

 at the ends of the striations of the margin ; it has the usual 

 attenuated, transversely-zoned stalk. Berkeley and Broome 

 state that Collyhia endochorda grows on wood, and has the 

 habit of A. radicatus : there is nothing to support either of 

 these statements, either in the specimens or the figures. The 

 specimen of Volvaria geaster was immature, so immature that 



