A, 



Artificial cultivations, absence of conidial fructification 



of Choanephera Simsoni in — ■ 257 



Ascomycetes, relation of Choanephora Simsoni to— . 161 

 Atmospheric conditions in relation to the progress of 



the blight of Ipomcea rubro-coerulea . . # 155 



B. 



Basidiomycetes, relation of Choanephora Cunning- 



hamianato— ■♦..... igi 



Botrytis cinerea . 4 , # # ; . ]66 



C. 



Capitella, characters of, in Choanephora Simsoni . 156 



Chcetocladium, parasitism of — . iqq 



Characters of the capitella of Choanephora Simsoni . 156 



of the spores ditto ditto . 157 



• of the zygospores ditto ditto . 150 

 • f generalised, of the genus Choanephora ♦ 161 

 Chlamydospores, conditions determining the forma- 

 tion of — 359 



germination of— .... 159 



- as a direct source of sporangial 

 fructification . 159 



-■ — — — — arising directly from spores or 



conidia . # # 159 



Choanephora, differences between conidial fructi- 

 fications of the two species of — . 155 



— • generalised type of the genus . ,160 



C. Simsoni, a facultative saprophyte . 161 



Colour of conidia in Choanephora Simsoni ♦ . 155 



of spores and sporangia ditto ditto . 157 



zygospores ditto ditto . 159 

 Conidia, deciduous character of, in Choanephora 



Simsoni # . # 156 



, measurements of — 156 



— not the parallels of unisporic sporangia . 158 



Conidial fructification the normal one in Choane* 



phora Simsoni # 156 



— — , association of f with exces- 

 sive nutrition , .156 



, production of, in Choane- 

 phora, an index to the presence of maximal nutri- 

 tional activity v 161 



, occasional appearance of, 

 in artificial cultivations of Choanephora Simsoni 

 on concentrated media • . • • • ♦ 1 58 



Criterion, De Bary's, of facultative parasitism and 

 saprophytism • .160 



Cultivations, artificial, forms of fructification occur- 

 ring in— ... 157 



■ 



D. 



Diffusion, method of, in the blight on Ipom*a rubro- 



cxrulca # 



. 167 



B. 



Epispore, striation of, in the conidia, 166. spores, 

 157, and zygospores of Choanephora Simsoni 



-.rupture of, on germination of spores and 

 conidia of Choanephora Simsoni . 



16.) 



168 



F. 



Facultative parasitism, De Ikry'a criterion of 

 Flexion, terminal, of stems of sporangia in Ch 

 phora Simsoni . 



ICO 



oane 



167 





Forms of fructification characteristic of -various 

 conditions of nutrition jj^ 



Fructification, sexual, formation of, frequent]/ 

 associated with decreased activity of nutrition and 

 vegetative growth iqq 



Function, mycelial, of the processes of the spores of 

 Choanephora Simsoni . . , 



Funnels, absence of, in the capitella of Choanephora 



168 



Simsoni . 



168 



G. 



Germination of spores and conidia . 



. 158 



H. 



Hibiscus rosa-sinensis, flowers of, as a basis for 



cultivations 157 



Host-plants of Choanephora Simwni . 157 





I. 



Ipomcea ruhro-ccerulea, blight of 



. 165 



M. 



Measurements of conidia of Choanephora Simsoni 



of spores 

 of zygospores 



ditto 

 ditto 



ditto 

 ditto 



Membrane, sporangial, usually tuberculate ♦ 

 Mycelium, characters of the, in Choanephora Simson 

 as a parasite on Ipomcea rubro-ccerulea # 



1G6 

 167 



169 



167 



156 



Number of capitella in conidiiferous fructification 

 of Choanephora Simsoni ..♦..! 



Nutrition, variations in conditions of, as determin* 

 ants of the production of various forms of fructi- 

 fication • • • • 166 



5 J 



