Notes. 
357 
STIGEO SPORIUM MARATTIACEARUM, gen. et sp. nov.— In the course 
of a comparative investigation of the anatomy of the Marattiaceae, a new rnycor- 
rhizal fungus, for which the generic name Stigeosporium is proposed, was noticed 
by the writer in roots of various genera of the above-mentioned group of Ferns. 
Special interest attaches to this mycorrhizal fungus inasmuch as it produces 
under natural conditions distinct reproductive bodies (other than ‘ vesicles ’) within the 
tissues of the host-root. 
The more important characters of this fungus are included in the following brief 
diagnosis : 
Diagnosis. 
Stigeosporium , gen. nov. 
Mycelium ramosum ex hyphis inter- et intra-cellularibus continuis rarissime 
septatis constans ; haustoriis numerosis, extremitatibus in ramulis radiatis valde 
dissectis ; sporis perdurantibus solitariis plerumque globosis raro subglobosis et cet., 
membrana crassissima irregulariter intense colorata. 
Differt a Phytophthora, cui arete affine, habito symbiotico (igitur conidia normalia 
non formantur). 
Sp. unica. 
Stigeosporium marattiacearu m , sp. nov. 
Hyphae initio hyalinae demum flavo-brunneae vacuatae 1-12/i crassae ; sporis 
aut intercalaribus aut terminalibus plerumque globosis 32-45 ^ diametro, raro sub- 
globosis vel ovoideis vel pyriformibus ; exosporio hyalino levi ; mesosporio crassissimo 
6 / x crassitudine minute punctulato flavo irregulariter intense colorato ; endosporio 
tenue. 
Hab. In radicibus subterraneis specierum variorum generum ( Angiopteris , 
Archangiopteris , Kaulfussia , Marattia) Marattiacearum S) mbioticum. 
Distrib. Asia orientalis, Zeylania, Australasia. 
A full description of this interesting fungus, with figures, will be published later. 
CYRIL WEST. 
Royal College of Science, 
South Kensington, S.W. 
I 9 , 5* 
Ann. Bot., Vol. XXVI, p. 205. 
The dimensions given on this page in terms of n should be multiplied by 10. 
