ATKINSON: SIX SPECIES OF AMANITA 249 
in Amanita cothurnata. Sometimes a portion of the thin marginal 
area of the calyptra may adhere to the rim of the ocrea, and 
thus resemble the volva limb of Amanita jonquillea, which is not 
ocreate but sheathing. In the latter species the volva is partly 
circumscissile and partly apical in its dehiscence. The volva is 
thin and weak. A portion of the calyptra margin remains at the 
base as a thin, free, sheathing limb, while the remaining portion 
rests on the pileus in the form of floccose patches. But the essen- 
tially differential feature in respect to the volva here is that 
the lower portion is not ocreate as it is in Amanitopsis albocreata. 
This feature can be seen in the lantern views presented here, 
from photographs of Amanita jonquillea which I made from speci- 
mens collected by me in the Maritime Alps, at Berre-des-Alpes, 
near Nice, in 1905 and also in 1910. The pileus of Amanita 
jonquillea is pale yellow, about the color of jonquils, and the 
margin is striate. The spores of Amanitopsis albocreata are 
globose to subglobose, while those of Amanita jonquillea are 
ellipsoid, as shown in these reproductions from photomicrographs 
of the spores. 
A thin partial veil and an annulus are present in Amanita 
jonquillea. The veil is quite thin and sometimes it is so torn 
during the expansion of the plant that a distinct annulus is not 
present. In rare cases a delicate annulus may be present in 
Amanitopsis albocreata. But in my numerous collections of this 
species I have not observed one. However, in all species of 
Amanitopsis which I have studied in the fresh state, the ground 
tissue is present, which, in many species of Amanita at least, 
forms the partial veil and annulus. This has been demonstrated 
in Amanitopsis vaginata through a study of the development of 
this species.* As I pointed out at that time, the distinction 
between the genera Amanita and Amanitopsis is probably not a 
natural one. There are several species of Amanita (and Amani- 
topsis also) in which the presence of an annulus is variable. The 
ground tissue forming the partial veil, though sometimes abundant, 
possesses a very low degree of coherence, with the result that some- 
times an ephemeral annulus is present and at other times it is 
absent. The facts that a distinct annulus is sometimes wanting 
* Atkinson, G. F. The development of Amanitopsis vaginata. Ann. Myc. 12: 
369—392. pl. 17-19. . 1914. 
