Index . 
ix 
PAGE 
Figures. 3. Salicornia europaea (Hill and de Fraine) 184 
Diagram 3. Salicornia (Hill and de Fraine) . . . .185 
4. Salsola Kali (Hill and de Fraine) 186 
5. A, Mesembryanthemum crystallinum ; B, M. Bolusii (Hill and de 
Fraine) 187 
6. Abronia villosa (Hill and de Fraine) 189 
Diagram 4. Abronia umbellata (Hill and de Fraine) . . . 190 
Diagram 5. Abronia umbellata (Hill and de Fraine) . 191 
Dragram 6. Allionia albida (Hill and de Fraine) . . . 192 
7. Mirabilis longiflora (Hill and de Fraine) 193 
Diagram 7. Mirabilis longiflora (Hill and de Fraine) . . . 194 
8. Mirabilis multiflora (Hill and de Fraine) 196 
1. Cordaites Felicis, sp. nov. (Benson) 204 
1. Somatic division in Primula and Galtonia (Digby) .... 362 
2 . Univalent lengths of spireme joining to form the bivalent combinations 
(Digby) 366 
1-4. Phaseolus multiflorus (Reed) 394 
5-8. Phaseolus multiflorus (Reed) ........ 395 
9. Phaseolus multiflorus (Reed) ........ 396 
1. Longitudinal section through attaching disc of Ulva (Dele) . . 404 
2. Diagram of longitudinal section through disc of Ulva latissima (Delf) 405 
3. Diagram of longitudinal section through disc of Ulva latissima (Delf) 406 
1. Detached shoot of Salicornia (Delf) 430 
1. Diagrams of transverse sections through primary stems of the Podo- 
carpeae (Stiles) . ...... 450 
2. Diagrams of transverse sections of leaves of the Podocarpeae (Stiles) 456 
3. Transverse sections through microsporophylls of the Podocarpeae 
(Stiles) 461 
4. Diagrams of a series of transverse sections through the ovule of Podo- 
carpus macrophyllus (Stiles) . . . . . . .471 
5. Diagrams of a series of transverse sections through the ovule of Podo- 
carpus latifolius (Stiles) 473 
6. Diagrammatic representation of a transverse section through an ovule 
of Podocarpus nagi (Stiles) 475 
7. Diagrams of transverse sections through an ovule of Podocarpus nagi 
(Stiles) 476 
8. Diagrammatic representation of megasporophylls to show the relation 
of ovule and sporophyll throughout the Podocarpeae (Stiles) . 491 
1-6. Tropaeolum peregrinum (Hill) . . . . . . 591 
7. Tropaeolum majus (Hill) 591 
1. Diagram of transverse section of peduncle of male spike of Gnetum 
africanum (Pearson) 608 
2. Diagram of longitudinal section through node and internode of male 
spike of Gnetum scandens (Pearson) 609 
3. Longitudinal section through two nodes and an internode of Gnetum 
Buchholzianum (Pearson) 610 
4. Longitudinal section through a node and parts of two internodes of 
Gnetum africanum (Pearson) . . . . . . .611 
5. Longitudinal section through apex of inflorescence of Gnetum scandens 
(Pearson) 612 
6. Longitudinal section through apex of male inflorescence of Gnetum 
africanum (Pearson) 613 
1-4. Series of median longitudinal sections of ovules of Bowenia of various 
ages (Kershaw) 627 
5. Portion of longitudinal section of ovule represented in Text-fig. 3 
(Kershaw) 628 
