ZOOLOGY AND BOTANY. MICROSCOPY, ETC. 705 



Herr P. Dietel * has found the teleutosporc form of Uredo Polypodii 

 on Cystopteris fragilis, and regards both this species and U. Aspndiotus as 

 belonging to Pucciniastrum rather than to Mclampsorella. 



Herr R. Stager f enumerates the species of grass which can be 

 infected by the following kinds of ergot, — Claviceps purpurea the ergot 

 of rye, 0. microcephala the ergot of Phragmites communis, and C. Wilsoni 

 the ergot of Glyceria flultans. 



Mr. F. H. Blodgett J records the occurrence of Darluca filum, parasitic 

 upon Uromyces caryophyllinus, the rust of carnations. 



Dr. C. Massalongo § describes a new disease of Aucuba japonica, 

 caused by the attacks on the leaves of a hitherto undescribed parasitic 

 fungus, Ramularia Aucubse sp. n. 



Two destructive diseases of the red cedar (Juniperus virginiana) are 

 described by Mr. H. von Schrenk,|| one caused by Polyporus cameus, the 

 other by a hitherto undescribed parasitic fungus, Polyporus juniperinus 

 sp. n. 



Trichurus spiralis and Stysanus stemonites.H — Mr. H. Hasselbring 

 has established the close affinity between these two forms of Hypho- 

 mycetous fungi. In both the spores germinate in a peculiar manner by 

 means of a stout primary germ-tube or proembryo. The mycele forms 

 a. small compact colony, from which there arises a conidial fructification 

 very different from the normal fructification, which consists of a bundle 

 of hyphee bearing basids and chains of conids at its summit. An 

 amended diagnosis is given of the genus Trichurus, which includes also 

 T. cylindricus. 



Botrytis and Sclerotinia.** — From a careful examination, in natural 

 conditions and under culture, of Botrytis cinerea and Sclerotinia Liber- 

 tiana, Mr. Ralph E. Smith comes to the conclusion that, though nearly 

 allied, these two species are not genetically connected with one another. 

 The latter species may grow either as a parasite or as a saprophyte, 

 and has no conidial stage of the botrytis type ; sclerotes are produced 

 abundantly, and the peziza form is easily obtained. Botrytis cinerea 

 is much less often parasitic ; and it is only in this mode of life that 

 it exhibits any close resemblance to Sclerotinia Libertiana. Its sclerotes 

 are highly characteristic, but no peziza form has at present been pro- 

 duced from them. A detailed account is given of the diseases caused by 

 or attributed to the two fungi. 



■"o-* 



Anthracnose of the Apple.ff — Mr. A. B. Cordley has investigated 

 the cause of this disease of apjde-trees, commonly known as " canker," 

 which is very destructive to the apple-trees in the western states of 

 America, and finds it to be quite distinct from Sphseropsis malorum, which 

 produces black-rot. The producing fungus, which is parasitic on the 



* Op. cit., xxxviii. (1899) Beibl., p. 259. 



t S.B. Bot. Inst. Bern. See Bot. Centralbl., lxxxiiii. (1900) p. 145. 

 % Bull. Torrey Bot. Club, xxvii. (1900) pp. 289-90 (1 fig.). 

 § Bull. Soc. Bot. Ital., 1900, pp. 166-7. 



1| Bull. No. 21 U.S. Dptmt. Agric. (Div. Veg. Phys. and Path.) 1900, 22 pp.. 

 7 pis. and 3 figs. % Bot. Gazette, xxix. (1900) pp. 312-22 (2 pis.). 



** Turn, cit., pp. 369-407 (2 pis. and 3 figs.). 

 ft Op. cit., xxx. (1900) pp. 48-5S (12 figs.). 



