TgIo] CURRENT. LITERATURE 229 
structures of the other, although the real nature of the structures has not yet been 
determined.—Snicko YaMANOUCHI. 
Development and biology of Armillaria.—FiscHeER,° of the Indian Forest 
Service, has given a brief but interesting account of the development of the fruit 
bodies of Armillaria mucida Schrad., an agaric with a very slimy outer surface, 
which is common in parts of Saree, growing often in dense tufts on certain of 
the hard-wood trees. There is a thin universal veil present from the primordium 
Stage to the time that the fruit body is rapidly expanding, which consists of inter- 
woven threads forming a layer two or three cells deep. In an early stage of the 
primordium a palisade layer of cells is formed over its convex upper surface, just 
underneath the universal veil. This marks off the pileus, which now begins to 
expand laterally, also loosening the fundamental tissue between its lower margin 
and the future stipe, thus providing for the gill cavity, while at the same time 
the development of a palisade layer is continued from the margin inward over the 
roof of the gill cavity to form the primordium of the hymenium. The loose funda- 
mental tissue between the margin of the pileus and the outer surface of the stem 
forms the partial veil. The slime which covers the plant is formed from the 
mucilaginization of the outer ends of the palisade tissue on the surface of the 
pileus. 
The writer states (p. 504) that the present reviewer “seems to accept HARTIG’s 
account of the development in Armillaria mellea as substantially correct.” Thus 
is discretion in the matter of not prejudging a case which is under investigation 
rewarded! A study of the development of Armillaria mellea was made by the 
reviewer several yéars ago, and an account? of it was presented before Section G 
of the A. A. A. S. at the New Orleans meeting, in connection with that on Agaricus 
campestris, the latter of which was published. He has been holding the work 
on Armillaria mellea for some further study to clear up some details. There is 
nothing in this paper on Agaricus campestris which can be construed as either 
Supporting or contradicting Hartic’s account, and the writer carefully held to 
neutral ground. 
It is to be hoped that FiscHER will continue his studies in the Agaricaceae, 
and that others also may be induced to undertake similar work. But it is just 
6 Fisc SCHER, C. C. E., On the development of the fructification of Armillaria 
mucida Schrid. Annals of Botany 23:503-507. pl. 35. figs. I-7. 1909. 
7 Ar TKINSON, GEO. F., The development of Armillaria mellea; the ager 
of Agaricus campestris. si A. A, ALS. 53rd ee Dec. 1905—Jan. 1906. 
Science N. S. 2 23:203. 1 
ae The pM of Agaricus campestris. BoT. GAZETTE 43:215-221. 
Pls. 7-12, 1906 
