34 
Journal of Mycology 
[Vol. 12 
above presents all the essential features of sexual conjugations 
as found in other plants and animals. Superficially considered, 
Raciborski’s conception that the sexual union may be regarded 
as consisting of two phases, cell fusion and nuclear fusion, might 
seem to fit the conditions found in the rusts. I am inclined, how¬ 
ever, to accept Blackman’s conclusion that the fusion in the teleu- 
tospore has wholly to do with the reduction of the number of 
chromosomes.” 
Otto Jaap, Fungi Selecti Exsiccati, Serie 4, Ausgegeben 
im Oktober 1904, contains: (76) Taphridium umbelliferarum f. 
peucedani, (77) Taphria coerulescens, (78) Exoascus alni in- 
canae, (79) Mycosphaerella salicicola f. amygdalinae, (80) Ophi- 
ognomonia padi Jaap n. sp. on Prunus padus, (81) Diaporthe 
valida, (82) Aporia Jaapii Rehm n. sp. on Aspidium squamulo- 
sum, (83) Naevia Rehmii Jaap n. sp. on Juncus anceps, (84) Bri- 
ardia purpurascens, (85) Lachnum arundinis, (86) Desmazier- 
ella acicola, (87) Mitrula pusilla, (88) Urocystis Fischeri, 
(89) Setchellia punctiformis, (90) Melampsora amygdalinae, 
(91) Uromyces ranunculi-festucae, (92) Uromyces scirpi f. 
hippuridis-scirpi, (93) Uromyces scirpi f. glaucis-scirpi, (94) 
Puccinia angelicae-bistortae, (95) Rostrupia clymi, (96) Cy- 
phella gregaria, (97) Polyporus brumalis, (98) Diplodina obio- 
nis Jaap n. sp. on Obione portulacoides, (99) Ovularia vossiana, 
(100) Didymaria linariae; and Supplement: 1. Magnusiella po- 
tentillae, 2. Nectria episphaeria, 3. Septoria nigerrima. 
The effect of different Soils on the Development of the 
Carnation Rust is discussed by John L. Sheldon of the West Vir¬ 
ginia Agricultural Experiment Station, see Bot. Gaz. Sept. 1905. 
The experiments reported and conclusions drawn are interesting, 
but since they are of little or no taxonomic significance they must 
be passed without further comment — with the remark, however, 
that he found that the soils favorable for the host were also favor¬ 
able for the Rust. 
Roland Thaxter, A New American species of Wynnea, 
Botanical Gazette, April 1905. It was found by the author in 
1888, in Tennessee, growing on the ground in rich woods, in a 
single locality, where several clusters of its long bluntly pointed, 
rabbit-ear-shaped, dark brown apothecia were scattered in a lim¬ 
ited space, each cluster borne on a well defined stout stem, emerg¬ 
ing directly from the humus. The same thing was collected also 
in Ohio. Dr. Thaxter named the species Wynnea americana, 
illustrating the same by two plates — one showing the plant nat¬ 
ural size and the other showing asci, spores and other details. 
Minnesota Helvellineae, Daisy S. Hone, Minnesota 
Botanical Studies, 3:309-321, PI. XLVIII-LII, Oct. 18, 1904, 
is a list of 14 species, with newly written descriptions, all splen¬ 
didly illustrated on heliotype plates. 
