1 1 4 I'HYCOMYCETES. 



but send a hyphal process inside, which branches into a tuft 

 ■of rhizitiils. IJestiuLi-spores niav be found, several in each cell. 



Cladochytrium (Urophlyctis) pulposum, (Wallr.), causes on 

 leaves, stems, and Howers of C/wnopodium and Atriplex glassy 

 -swellings, in the undermost cells of which are situated the 

 zoosporangia. The resting- spores have brown shining walls and 

 lie inside the cells. The zoospores are uniciliate. 



CI, (Ur.) butomi, IMisgeu. On leaves of Butomus umhcllatuH. 

 Black spores are produced C(nitaining resting-spores. The col- 

 lecting cells have tufts of hair. 



Physoderma. 



Zoosporangia are absent. liesting-spores formed, several in 

 •each host-cell. 



Cladochytrium (Phy.) menyanthis, De Bary (U. S. America). 

 On leaves and petioles of Menyanthes trifoliata this forms 

 vesicles containing resting-spores. The collecting cells have 

 terminal hair-tufts. Diseased leaves are generally smaller than 

 Ileal thy. 



CI. (Phys.) flammulae, Jitisgen, forms little swellings on 

 leaves of Ranvnculn^i Fhun inula. 



CI. (Phys.) Kriegerianum, Magnus, causes transparent swell- 

 ings on Ciiruiii (Jar /'I. 



CI. (Phys.) iridis, De Bary, on Iris pseudacorus. 



F'ischer mentions other species on Scirpus, Alisma, Bammcuhos, 

 FotentAlla anserina, Silaus pratensis, Sium lafifolivm, Phalaris, 

 Glyceria, Sympliytum, Mmtha, Rvmcr, Allium, etc. 



Prunet ^ describes Cladochytrium viticolum as the cause 

 of the nmch-discussed Bruiiisure of vine ; also CI. mori as a 

 new disease of the mulberry.^ 



The .same authority^ de.signate.s as Pyroctonum sphaericum, a ])arasite on 

 wheat, which has become very abundant in Soutliern France. 



(2) ZYGOMYCETES. 



Unicellular fungi. Sexual reproduction does not take place by 

 the fertilization of an ovum in an oogonium by an antheridium, 



1 Prunet, Gomjit. rmd., 1894. - Prunet, Compl. rend., cxx., 1895, p. 222. 



3 Prunet, Compt. rend., 1894, ii., p. 108. 



