Index. 
xm 
PAGE 
Figures. mother-cell. io. Immature sac of Ludwigia prostrata, with binu- 
cleate sister megaspore at the lower end. u. The same, mature 
sac (Ishikawa). facing 301 
IX. Embryo sac of Trapa. 1. Embryo sac mother-cell; nucleus in synapsis. 
2. The same; heterotype division. 3. Tetrad; lower megaspore 
growing. 4. Chalazal megaspore in binucleate stage. 5. Upper 
part of mature sac, with egg apparatus obliquely cut. 6 a, b. Two 
succeeding sections through antipodal region; antipodal nuclei 
deforming (Ishikawa).303 
X. Sagittal section of ovule. 1. Trapa natans. 2. T. natans var. incisa 
(Ishikawa) .. 304 
XI. General sketch of homology of tetranucleate embryo sac (Ishikawa) . 305 
XII. Various stages showing distribution of chromatic substance with 
reference to development of ovule (Ishikawa) .... 308 
XIII. Portion of chalazal tissue containing chromatic substance (Ishikawa) 309 
XIV. Longitudinal section of ovule, showing distribution of starch grains by 
means of dots (Ishikawa).310 
1. Dumortiera trichocephala, Hook. a. Large sterile specimen from 
Luzon, Philippine Islands. B. Fertile plant from Tjibodas, Java, 
c. Open sporogonium. d, e. Open capsule, showing the deeply 
divided valves, f. Ripe spores and part of an elater. G. Section 
of ripe spore (Campbell) .. .321: 
2. D. trichocephala (Taiping Hills, Federated Malay States). A. Female 
plant with young carpocephala. B. Individual with a ripe carpo- 
cephalum and an androgynous receptacle (<J?). C. A male plant. 
* D. Open sporogonium. E. Carpocephalum with ripe sporogonia 
(Campbell).322 
3. D. velutina, Schiff. A. Female plant with young carpocephala. 
B. Male plant. C, D. Mature carpocephala. E. Ripe spore 
(Campbell).322 
4. A. Section of an antheridial receptacle of D. trichocephala. b-e. Young 
antheridia of D. trichocephala. F. Ripe antheridium v G. Antheri- 
dium of D. velutina (Camprell) .324 
5. A. Section of young carpocephalum of D. trichocephala. B. Similar 
section of D. velutina. c, d. Young archegonia of D. trichocephala. 
F. An older archegonium. G. Ripe archegonium. H. Archegonia 
of D. velutina (Campbell) .. 326 
6. D. velutina. a. Archegonium containing a two-celled embryo. 
b. Another section of the same embryo, c. A similar embryo. 
D. Three-celled embryo. E. Two sections of an older embryo. 
F. An older embryo; the cells of the sporogenous tissue have their 
nuclei shown. G. Four slightly oblique transverse sections of 
a young embryo (Campbell). . . 327 
7. A. Young sporophyte of D. trichocephala. B. An older sporophyte 
(Campbell).329 
8. A. Young sporophyte of D. velutina. B. Apex of an older sporophyte, 
showing spore mother-cells and young elaters (Campbell) . . 330 
9. A. Ventral scale. B. Three rhizoids from the thallus of D. calcicola 
(Campbell) . 33 3 
10. A. Ventral scale of Wiesnerella showing the terminal appendage. 
b. Three rhizoids oi Wiesnerella (Campbell) .... 335 
Sources and Distribution of the New Zealand Flora (Willis) — 
1. Ranunculus (Willis) . 343 
2. Pittosporum (Willis) .. 344 
3. Gunnera (Willis) .345 
