THE ORIGIN OF ANGIOSPERMS. 77 
supposition that, in the modern Cycads, the monosporangiate condition was 
originally derived from a amphisporangiate strobilus. Оп the other hand, the 
amphisporangiate Strobilatece gave rise to other groups, such as the Веппей ег 
and the Angiosperms, in the manner indicated in the following table :— 
TABLE OF ANGIOSPERMOUS RELATIONSHIPS. 
| —— Recent | 
| A 
| Tertiary. < E З. 
| | Ё 3 
= E 
= | 
> © | 
© zi 
2 о | 
L - а = 
= Ranalian | plexus 
2, g Eu-anthostrobilates E 
5 E 1р 
| . | = | 
Mesozoic. < 3 А 
Е S 
E ® 
| Pro-anthostrobilatez. `2 
EU 
| |. | = 
| 
| Monosporangiatez. | Diplosporangiateæ. 
g 
. | 2 
| Paleozoic. < | z 
| Ё, 
a 
| | © 
| i| = 
| 
| C = 
| 
| - 
BIBLIOGRAPHY. 
ALLEN, ©. (1882).—The Colours of Flowers. (Nature Ser.) London, 1882. 
Anonymous (1906). — Discussion on the Vascular Structure of Seedlings. New Phytologist, 
vol. v. 1906, p. 182. 
Benson, М. (1904).— The Origin of Flowering Plants. New Phytologist, vol. iii. 1904, p. 49. 
Benson, M., SandaY, Е., & BERRIDGE, E. (1906).—Contributions to the Embryology of 
the Amentiferre. Part II. Carpinus Betulus. Trans. Linn. Soc. London, 2nd' ser. 
Bot. vol. vii. pt. 3, 1906, p. 37. 
Bessey, С. E. (1897).—Phylogeny and Taxonomy of the Angiosperms. Bot. Gaz. vol. xxiv. 
1897, p. 145. 
