102 Agnes Robertson. 
16. Robertson, A. “ Spore Formation in Torreya californica." New 
Phytologist 3, p. 133, 1904. 
17. Idem. “ Studies in the Morphology of Torreya Californica , II.” 
New Phytologist 3, p. 205, 1904. 
18. Strasburger. E. “ Anlage des Embryosackes und Prothallium 
bildung bei der Eibc.” Festschrift zum 
Siebzigsten Geburtstage von Ernst Haeckel, 
p. 1. 1904 (Reviewed Bot. Gaz., 1904, p. 483). 
19. Coulter, J. M. and Land, W. J. G. •* The Gametophytes and 
Embryo of Torreya taxifolia .” Bot. Gaz., 
39. p, 161, 1905. 
20. Jeffrey, E. C. The Comparative Anatomy and Phylogeny of the 
Coniferales, 2, The Abietinese.” Mem. Bost. 
Soc. Nat. Hist. 6, No. 1, 1905. 
21. Thomson, R. B. “ The Megaspore-Membrane of the Gymno- 
sperms.” University of Toronto Biological 
Series, No. 4, 1905. 
22. Robertson, A. “ Some Points in the Morphology of Phyllocladus 
alpinus .” Annals of Bot. 20, p. 259, 1906. 
23. Scott, D. H. ‘‘The Affinities of Pteridosperms and Gymno- 
sperms.” Abstracts for discussion, Linnean 
Soc., March 15th, 1906. 
24. Seward, A. C. and Ford, S. O. “ The Araucariea;, Recent and 
Extinct.” Phil. Trans. Roy. Soc. Lond., 
198, B, p. 305, 1906. 
25. Wieland, G. R. “ American Fossil Cycads,” 1906. 
26. Lawson, A. A. “ The Gametophytes, Fertilization and Embryo 
of Cephalotaxus drupacea," Annals of Bot. 
21, p. 1, 1907. 
EXPLANATION OF PLATE I., 
Illustrating Miss Agnes Robertson’s Paper on The Taxoide^e. 
Fig. 1. Torreya californica. Fertilisation stage. Egg cell (e.c.) and pollen- 
tube ( p.t .) from longitudinal section of ovule gathered September 17th, 
1902, shewing entry of functional male nucleus (<?,). The second 
male nucleus (<? 2 ), distinguished by its smaller size, remains in the 
rear of body cell ( b.c .) The egg nucleus ( ? ) and the remains of two 
neck cells (n.c. and n.c.u.) are shewn. (Preparation and drawing by 
Mrs. Tansley). 
Fig. 2, A, B, C, D. Taxus baccata. Stages in the division of the body cell. 
v.n., vegetative nucleus. From sections of ovules gathered June 18th 
and 21st, 1906. (x about 500). 
Figs. 3, 4, 5. Comparison of female ‘‘flower” of Cordaites, Taxus and 
Torreya. o, ovule; a, arillus; b, bract; b' bracteole; g p., growing 
point; /, leaf subtending primary shoot; s,, primary shoot; s 2 , 
secondary shoot. 
Fig. 3. Diagrammatic longitudinal section through the “ primary shoot ” of 
Cordaianihus Williamsoni (after Renault.) 
Fig. 4a. Diagrammatic longitudinal section through “ primary shoot ” of 
Taxus baccata , illustrating a case in which the second ovuliferous axis 
(which usually aborts) has developed. (From a preparation by Miss 
T. L. Prankerd.) 
Fig. 4n. External view of a biovulate primary shoot of Ta.vus baccata, cf. Fig. 
4a. (after Pilger.) 
Fig. 5a. Diagrammatic longitudinal section throngh the “ primary shoot ” ‘‘of 
Torreya californica. 
Fig. 5b. External view of shoot of Torreya californica with biovulate primary 
shoot in axil of leaf /, cf. Fig 5a. 
