Tanaka : New Japanese Fungi 



85 



middle, not at one-third or one-fifth of the whole length as in B. 

 Lactucae, (2) the form of disk of terminal branches of coni- 

 diophore nearly spherical instead of disk-shaped. 



(2) Bremia saussureae Sawada sp. nov. 1. c. p. 80-83. Text 

 fig. 2. 



Foliicolous ; spots pale-yellowish, polygonal, about 15 mm. 

 broad, forming a dense white growth on the under surface of 

 leaves ; intercellular hypae running through mesophyll tissues, 

 granulate, 8-1 7 /x across; haustoria ovoid, obovoid, or irregular, 

 14-27 X 5-14 ft ; conidiophore single or caespitose from stomata, 

 very long, 270-1021 p., 3-6 dichotomously branching, branches all 

 short and stout, the dimension of main stem and branches of 

 first to fourth orders measuring respectively 622 X 10, 57 X 8, 

 37X7, 28X5, i8X4itt, septate (usually 5-6), swellings of 

 terminal branches 4-6 sterigmate, sterigmata 6-ioX3/>«-, termi- 

 nated by single standing conidia ; conidia conspicuously large, 

 broadly ellipsoid to elongate-oblong, flat-papillate above, pedi- 

 cellate below, granulate, 24-57 X 18-28 /x, hyaline, germinate in 

 2 hours, germ tubes 4.5-7 /x across, not uniform in diameter. 



On Hemistepta carthamoides {—Saussurea affinis not 

 Spreng.). 



Locality: Taiwan (Formosa). Common. 



Illustration : One woodcut text figure showing conidiophore, 

 conidia, and haustoria. 



Inoculation experiment negative on Crepis japonica, Sanchus 

 oleraceus, Lactiica dehilis, Lactiica scariola var. sativa, Lactuca 

 laciniata, Arctium Lappa, and Taraxacum platycarpum. 



(3) Bremia ovata Sawada sp. nov. 1. c. p. 83-84. Text fig. 3. 

 Hyphae 7 ft across ; conidiophores caespitose, total length almost 



I mm., 3-8 times dichotomously branching, usually 7-8 septate, 

 main stem comparatively long, branches short, average dimension 

 of main stem and branches of first to fifth orders measuring re- 

 spectively 591X8, 55X6, 52X5, 44X3-5, 24X3, 13X3/^; 

 swelling a terminal branch spherical or top-shaped, 3-7 sterig- 

 mate ; sterigma 6-8 fx long ; conidia ovoid or oblong-ovoid, minutely 

 pedicellate below, apical papilla obsolete, 14-18 X 10-13 ft, hyaline, 

 granulate, germinate with germ tubes ; germ tubes 3.5-4 across, 

 nearly uniform in thickness. 



On Crepis japonica, occurring with Profomyces Iiionyei P. 

 Henn. 



Locality: Taiwan (Formosa). Rare. 



