428 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
Fungi from the Higher Rhone Valley. — J. Courtillot {Bull. 
Soc. Mycol . France, 1922, 38, 31-3). The author records several of 
the larger Agarics : species of Tricholoma, Clitocybe, Russula, etc. He 
takes occasion to note observations as to odour, taste, habitat, etc., that 
do not always accord with the published descriptions. A. L. S. 
Notes on Boletus sphsBrocephalus. — L. Corbiere {Bull. Soc. 
Mycol. France, 1922, 38, 71-7, 1 pi. col.). The author found a con- 
tinuous growth of this rare Boletus on sawdust. It is very near to 
Boletus sulphureus , but the latter is smaller, non-viscous, and is tomen- 
tose, squamose, and with cystidia. It is edible and occurs on sawdust 
heaps. A. L. S. 
Observations on the Affinities of Boletus sulphureus Fr. and 
B. sphaerocephalus Basla. — M. Peltereau {Bull. Soc. Mycol. France, 
1922, 38, 78-82). The fungus observed by Corbiere was submitted to 
M. Peltereau, who considered it to be a form of Boletus sulphureus. 
He gives his reasons for this determination, and finds that the differences 
may be due to habitat — B. sulphureus growing on pine needles, etc., 
while B. sphserocephalus is confined to saw-dust heaps. A. L. S. 
Dark-spored Agarics. IV., Deconica, Atylospora and Psathyrella. 
— William A. Murrill ( Mycologia , 1922, 14, 258-78). Murrill gives* 
complete diagnoses of the various species. Many of them are confined 
to America. A number of new species are described, more especially in 
the genus Atylospora. A. L. S. 
New Facts concerning Boletus Satanas and its Allies. — 
Heinrich Lohwag {Oesterr. Bot. Zeitschr., 1922, 71, 129-34). The 
paper is mainly concerned with the colouring of the flesh of these fungi 
on exposure to air, etc. Lohwag finds errors concerning this in the 
descriptions, but in general lie notes that the red colour is closely 
associated with the blue coloration, while the blueing depends on the 
strength of the yellow colour present. Fungi that turn blue may also 
turn red ; and also the normal red colour may be absent from the 
stalk and the pores. Boletus Satanas can have yellow flesh which turns 
immediately blue. In view of his observations on the presence or 
absence of colour and the colouring action of the air, etc., he finds it 
necessary to make some important changes of specific determination, as 
for instance : Boletus versicolor is a perishable form of B. chrysenteron, 
the latter being itself a form of B. subtomentosus ; similarly B. calopus 
and B. purpureus are perishable (or perishing) forms of B. luridus. 
Further critical notes on the subject, with a list of species in the 
Luridus group, have been published more recently {Hedwigia, 192 2, 
63, 323-8). A. L. S. 
Homothallism and Heterothallism in the Genus Coprinus. — - 
Irene M ounce {Trans. Brit. Mycol. Soc., 1922, 7, 256-69). The 
author has made a detailed study of several species of Coprinus to 
determine the occurrence and significance of clamp-connexions in the 
developing mycelium. The paper is a continuation of a previous paper 
(pp. 179-217) on the production of fruit-bodies by monosporous. 
