378 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
New Genera of Fungi. — Under the name Matruchotia vartans , 
M. E. Boulanger * * * § describes a fungus found on the bark of a South 
American root, which he makes the type of a new genus belonging to the 
Basidiomycetes, but which, cultivated under certain conditions, may 
assume all the characters of the Mucedineae. The genus is thus de- 
fined : — Thallus filamentous, aggregated, with an erect branched spo- 
riferous apparatus ; hymene wanting ; fertile hyphae bearing numerous 
lateral and a single terminal basid, each basid producing two smooth 
ovoid colourless spores, 6 by 4 to 4 • 5 /x. 
M. E. de Wildeman f finds among freshwater algae a lowly-organized 
fungus allied to Titsea, which he describes as Tetracladium Marchalianum 
g. et sp. n. The following is the diagnosis of the genus : — Pluricellular, 
composed of four diverging branches springing from the same point ; 
branches more or less acute ; protoplasm colourless, destitute of a chro- 
matophore ; gemmae are produced in the axils of the three upper branches 
and at the base. 
M. J. Oostantin J has found on starch an Ascomycetous fungus form- 
ing the type of a new genus which he names Eurotiopsis. It is allied to 
Eurotium , but differs in the nature of its peritheces, and in the structure 
of its conidial apparatus. 
Parasitic Fungi. § — Herr N. Lapine finds that in many cases cancer 
of the apple-tree is produced directly by the attacks of Nectria ditissima. 
Dr. C. v. Tubeuf|| describes the effects of the following parasitic 
fungi : — Valsa oxy stoma and Polyporus igniarius on Alnus incana ; 
Gibbera Vaccinii on Vaccinium Myrtillus ; Exobasidium Bhododendri , 
Cenangella Bhododendri , Sclerotinia Bhododendri, and Chrysomyxa Bho- 
dodendri, on the alpine species of Bhododendron ; Gymnosporangium juni- 
perinum and clavariseforme on Juniperus communis; Herpotrichia nigra 
sp. n. on various conifers ; Exobasidium Vaccinii on Vaccinium Vitis 
Idsea, uliginosum , and Myrtillus ; Uromyces Primulse on Primula villosa ; 
Bhytisma salicinum on Salix reticulata at the highest altitudes ; Cronar- 
tium asclepiadeum on Cynanchum Vincetoxicum ; TJstilago Jensenii on 
barley ; U. Maidis on maize ; Bhytisma acerinum and punctatum on the 
sycamore. 
Herr B. Frank ^ describes the injuries inflicted on cucumbers by the 
attacks of Cladosporium Cucumeris, which may possibly be identical with 
the Sporidesmium found on tbe fruit. 
M. G. Delacroix ** records the parasitism of Isaria dubia sp. n. on 
insects; of Phyllosticta Cyclaminis on Cyclamen persicum ; of P. glauci- 
spora on Nerium Oleander; and the growth of Fracchisea rostrata on 
dead roots of the vine, from the pycnids of which fungus springs a luxu- 
riant growth of Fusarium Muntzii. 
* Rev. Gen. de Bot. (Bonnier), v. (1893) pp. 401-6 (3 pis.). 
t Ann. Soc. Beige Microscopie, xvii. (1893) pp. 35-40 (1 pi.). 
t Bull. Soc. Bot. France, xl. (1894) pp. 236-8. 
§ Landwirthsch. Jahrb., xxi. (1892) p. 937. See Bot. Centralbl., lvii. (1894) p. 23. 
|[ Zeitscbr. f. Pflanzenkrankheiten, iii. (1893) pp. 140-3, 201-5. See Bot. Cen- 
tralbl., lvii. (1894) p. 86. 
Zeitsclir. f. Pflanzenkrankheiten, iii. (1893) pp. 30-1. See Bot. Centralbl., lvii. 
(1894) p. 121. 
** Bull. Soc. Mycol. France, 1893, p. 264 (1 pi.). See Bot. Centralbl. ,1 vii. (1893) 
p. 133. 
