ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 209* 



Lichen-Flora.* — Carlo Zanfrognini concludes his list of Lichens 

 from the district of Emilia. The present contribution includes the 

 families Lecideacerc, Yerrucareaceae, Caliciae, Graphidacese, Collemaeese, 

 and Micaraese. 



Lichens from Gralapagos.f — The enumeration of the Lichens from' 

 Galapagos by W. G. Farlow is based on the collections of Snodgrass 

 and Heller, and of various previous collectors. The specimens belong 

 chiefly to the larger and more striking forms, which are in most 

 cases identical with species found on the Pacific Coast of America 

 from California to Chile. 



Kryptogamen-Flora : Fungi imperfecta *— In part 8G of this Flora 

 Andreas Allescher concludes the " Fungi imperfecti." He deals with 

 the genera Hyaloceras, Toxosporium, and with the genera belonging to' 

 the groups of Dictyospora3 and Scoleeosporaj. He also gives a first 

 instalment of additions to the genus PhyllffSticta. Figures illustrating 

 the genera are given in the test. In part 87 Phyllostirta is concluded 

 and the species recently added to the genus Phoma are described. 



Black-rot of Grapes. § — G. Delacroix confirms by experimental 

 cultures the existence of a conidial stage in the fungus Guignardia 

 Bidwetti, which forms sclerotia and later pycnidia on grapes. The 

 conidial form resembles a Scole'cotrichum ; single conidia are borne at 

 the apex of upright hyphse. 



Polymorphism of Microfungi.|| — R. Farneta found an Oidium 

 parasitic on Salvia Horminum which he describes as Oidium Hormini. 

 He made a series of cultures, and from the Oidium he developed 

 several forms of Botrytis, a sclerotium, and microconidial forms of 

 Macrusporium and Alter -nana. 



Sceptromyces Opizi.^f — This plant has also been named in its im- 

 mature form Botrytis sceptrum. C. Engelke found it growing on 

 chestnut husks, and on cultivating it under certain conditions it de- 

 veloped Aspergillus niger. He verified the result by repeated culture 

 experiments. A rise of temperature invariably secured a growth of 

 Aspergillus. The Sceptromyces form was produced with a lower tem- 

 perature, a deficient supply of nitrogen, and increased humidity. 



Botrytis parasitica.** — This fungus is the cause of a serious disease 

 of tulips and some other bulbous plants, and Ritzema Bos gives an 

 account of his experience of the disease. It attacks the leaves, causing 

 brown spots ; it also attacks the young buds, entirely destroying them. 

 In these cases the Botrytis form of the disease is specially prominent.. 

 When the bulb is attacked sclerotia are "developed. The author has not 

 succeeded in obtaining any Peziza fruits, though he has induced the 



* Nuov. Giorn. Bot. Ital., ix. (1902) pp. 434-50. 

 t Proc. Ainer. Acad. Arts and Sci., xxxviii. (1902) pp. 83-9. 

 X Kabenhorst's Kryptogamen-Flora^Bd. i. Abth. vii. Lief. 86 (1902) and 87 (1903). 

 § Coinptes ltendus, exxxv. (1902) pp. 1372-4. 



|| Estratto Atti R. 1st. Bot. Univ. Pavia, vii. (1902) 42 pp., tav. 17-20. See also 

 Hedwigia, Beibl. xli. (1902) p. 232. 



1 Hedwigia, Beibl. xli. (1902) pp. 219-21. 

 ** Centralbl. Bakt., x. (1903) pp. 18-26, 



April 15th, 1908 p 



