Figures. 
3 * 
Index . 
xi 
PAGE 
Graphs of pH values of culture solutions after contact with plant roots during the 
growth intervals between solution renewals ; averages of all tests made during 
the growth period (Jones and Shive).367 
4, 5. 4. Distribution of the highest five yields of soy bean tops and roots from the 
cultures of series E, supplied with ferric phosphate as the source of iron for the 
plants. 5. Ditto from the cultures of series F, supplied with ferrous sulphate as 
the source of iron for the plants (Jones and Shive) ...... 370 
6. Distribution of the highest five yields of soy bean tops and roots from the cultures 
of series G, supplied with ferric phosphate as the source of iron for the plants 
(Jones and Shive).371 
Cladotheca undans (Halle): r, transverse section of sorus embedded in the rock; 
2, ditto, upper surface of lamina exposed ; 2 a , surface view of 2 ; 3, transverse 
section of sorus with portion of lamina removed, exposing some of the under¬ 
lying sporangia ; 3 a, surface view of 3, showing a row of sporangia on each side 
of the vein ; 4, transverse section of sorus in a transfer preparation ; 4 a , surface 
view of 4, showing the sporangia covering the underlying vein (WALTON) . . 387 
I. Eidamia acremonioides. Mycelium, showing typical branching and macrospores 
(Horne and Williamson).394 
2,3. 2. Ditto. Conidiophores showing chains and groups of conidia. 3. Ditto. Types 
of conidiophores produced when grown on potato extract agar at 20° C. for four 
days (Horne and Williamson).395 
4. E. viridescens. Terminal and intercalary macrospores on potato extract agar at 
25 0 C. (Horne and Williamson).396 
5,6. 5. Ditto. Conidiophores on synthetic medium plus agar at 20° C. 6. Ditto. 
Conidiophores from a culture on potato extract agar at 20° C. (Horne and 
Williamson). 397 
7,8. 7. E. catenulata. Swollen cells producing sterigmata; from a culture on N/100 
HC 1 potato extract agar at 20° C. 8. Ditto. Macrospores from a four-day 
culture on potato extract agar at 20° C. (Horne and Williamson) . . 399 
9-11. 9. Ditto. Conidiophores. 10. Ditto. Conidiophores of various types on a 
synthetic medium plus agar at 20° C. 11. Ditto. The Penicillium type of 
conidiophore on potato glucose agar at 25 0 C. (Horne and Williamson) . 400 
12, 13. 12. Ditto. The formation of conidial group from a culture on potato extract agar 
at 25° C. 13. Ditto. Mycelium with irregular swollen clusters of cells ; from 
a synthetic medium plus agar at 25 0 C. (Horne and Williamson) . . .401 
14. Ditto. Growth on potato extract agar with various concentrations of malic acid 
(Horne and Williamson).415 
15. E. viridescens. Ditto (Horne and Williamson).416 
16. E. catenulata. Growth on potato extract agar with various strengths of tartaric 
acid (Horne and Williamson).417 
17. E. viridescens. Growth on potato extract agar with various concentrations of 
tartaric acid (Horne and Williamson) ........ 418 
18,19. 18. E. catenulata. Growth on potato extract agar with gallic acid. 19. E. virides¬ 
cens. Ditto (Horne and Williamson).419 
20. E. catenulata. Growth on potato extract agar with tannic acid (Horne and 
Williamson).420 
21. E. viridescens. Ditto (Horne and Williamson) . . . . . .421 
22. E. catenulata. Growth on potato extract agar with N/50 solutions of various acids 
(Horne and Williamson).422 
23. E. viridescens. Ditto (Horne and Williamson).423 
1. Longitudinal section of wood-vessel showing hyphae with globules of secretion 
and chains of conidia (Williamson).436 
2. Radial section of wood showing hyphae passing through pits in the walls of the 
tracheides (Williamson).437 
3. Tangential section showing hyphae and hyaline spores (Williamson) . . . 438 
4. Lumen of wood-vessel showing pits, hyphae, and chains of conidia (Williamson) 439 
1. Seedling coco-nut palm with a ‘ lateral ’ bud (Petch and Gadd) .... 446 
