88 SUMMARY OF CURRENT RESEARCHES RELATING TO 



remains unfinished. Theiszen and Sjdow here give special attention 

 to the stroma in their research, and the arrangement chosen follows on 

 the lines of its growth and mature form. They divide the Dothideales 

 into four famiUes : (1) Polystomellace^, with three sub-families — Parmu- 

 lineae, Poljstomelleae and Munkielleae ; (2) Dothideaceae, also with three 

 sub-families — Coccoideae, Leveillelleae and Dothidese ; (3) Phylla- 

 choraceae, divided into Trabutinese, Scirrhineae and Phyllachorineae ; 

 (4) Montagnellacea?, with two sub-families — Eu-Montagnelle^e and 

 Eosenscheldieae. The last family has a very reduced vegetative stroma, 

 or a basal stroma only, or none. In these famihes they recognize 140 

 genera set out in a systematic key. Of these some 64 are new names. A 

 number of well-known genera have been included in others, as, for 

 instance, Ploivrightia, which gives way to a previous name, Dothidella. 

 Each species is fully described, and there is a complete index. A. L. S. 



Occurrence of Bulgaria platydiscus in Canada. — A. W. McCallum 

 (Mycologia, 1919, 11, 293-5, 1 pL). This fungus, originally described 

 from Konigsberg in Germany, has recently been found in the valley of 

 the Lievre River. The plant was allowed to mature, and drawings 

 were made of the peculiar spiral form of the exterior hyphae. A full 

 description is given. A. L. S. 



Contributions to the Systematy of the Ascomycetes. — F. Theiszen 

 {A7in. MijcoL, 19?6, 14, 401-39, 1 pL). Theiszen divides the 

 present " contribution " into three divisions. The first deals with 

 Perisporiaceae, and notes are given on a number of genera. Two new 

 genera are added to the family — Stomatogene, on which the perithecia 

 grow superficially on a brown felted mycelium, but penetrate the leaf 

 through the stomata by a central "foot," is founded on Asterina Agaves 

 E. & E. Another genus, Piline^ is substituted for Asterina splendens. 

 The second division discusses various species of Physalospora^ a number 

 of which are removed to other genera. Pledosphaera g. n. replaces 

 Physalospora Bersamae Syd. Several other species are included in the 

 new genus. Physalospora rosicola becomes the type of Schizostege g. n., 

 and Physalospora boreal is the type of Heter opera g. n. Under 

 Stigmataceae (the third division) he gives notes on the genera Stigmatea, 

 Ooleroa and Vigella. Finally, he discusses various fungi, establishing as 

 new genera Halbaniella (Microthyriace^e) and Plactogene (Sphaeriaceae). 

 Theiszen has in this paper established seven new genera. The plants 

 dealt with are herbarium specimens. A. L. S. 



^Study of Botryosphseria.— F. Theiszen {Ann. Mycol., 1916, 14, 

 297-340, 1 fig.). Theiszen gives an historical account of this genus, 

 and then describes its characteristics and affinities. In most of the 

 species the perithecia are embedded in a stroma ; only rarely are they 

 isolated. The inner structure of the stroma is not distinctive, and 

 spores are frequently undeveloped in herbarium material. It is neces- 

 sary, therefore, in distinguishing species to rely more or less on the 

 outward appearance of the fungus. He divides the genus into 

 (1) Sderopleoidea, in which the perithecia occur singly, and Botryosa, 

 where they are united in a stroma. The Botryosa species are further 



