BIBLIOGRAPHY. 
9 
An Examination of the Species of the Genus Doassansia , Cornu. 
— W. A. Setchell (Annals of Bot., Yol. vi., pp. 1-48) gives a 
detailed account of the morphology and systematic affinities of the 
species of Doassansia. The structure and spore germination are 
beautifully illustrated on two double plates. Five new North 
American species are described. The author is mistaken in 
supposing that Sphaeria (Depazea) alismatis, Currey, is synony- 
mous with Doassansia alismatis (Nees.), Cornu. Currey’s species is 
a Phyllosticta , P. Curreyi, Sacc. Syll., Yol. iv., No. 331. 
Gymnosporium confusum . — Ed. Fischer (Soc. Helvet. des Sci. 
Nat., t. xxvi., p. 490, 1891) in a preliminary note corroborates 
Plowright’s statement as to the validity of Gymnospurangium 
confusum , Plow., being a distinct species. 
Septohasidium , a New Genus of Hymenomycetes. — M. N. Patouil- 
lard (Journ. de Bot., Morot., 1892, p. 61) gives an account of the 
morphology of Thelephora pedicellata, Schw., the species on which 
the new genus is founded. The basidia are borne near the tips of 
the ultimate branch] ets of the resupinate subiculum, and consists 
of a basal globose cell, from which springs a stout, curved, trans- 
versely septate filament or sterigmatophore, bearing the sterigmata 
on the convex side. The genus is most nearly allied to Helico- 
basidium , Pat., but distinguished by the large globose, aseptate, 
basal cell bearing the sterigmatophore. 
On the Effects of the Parasitism of Ustilago anther arum (Fries ). — 
Yuillemin (Comp. Rend., 1891, p. 662) points out that Ustilago 
antherarum, Fr. (U . Violacea, Pers., Feld.) — a parasite common 
in the anthers and ovaries of species of Silene , Lychnis , Saponaria , 
and allied plants, causing what Giard (Comp. Rend., 1888, p. 
757) calls “parasitic castration of the anthers ” — illustrates a very 
remarkable relation between parasite and host. In pistillate 
flowers of Lychnis , the rudimentary anthers are stimulated to 
develop by the presence of the parasite, but the tapetal and arches- 
porial layers are replaced by the mycelium and spores of the 
parasite. The development of the anthers in normally pistillate 
Lychnis flowers extends to the formation of those layers of the 
anther walls by which dehiscence is effected, hence the Ustilago 
spores are dispersed by the host-plant, as if they had been pollen- 
grains. Furthermore, the accessories of the normal staminate 
Lychnis flowers are developed in the pistillate form under these 
peculiar conditions, and such blooms are visited by those insects 
which convey the pollen of the staminate flower to the stigmas of 
the pistillate flower ; under the circumstances described above the 
spores of the fungus are removed by the insect and deposited on the 
stigmas of other flowers, which in turn become affected by the 
parasite. 
The Genus Meliola (A. Gaillard). — This carefully- elaborated 
monograph contains chapters on the morphology and anatomy of 
