34 . BOTANICAL GAZETTE [JANUARY 
14. The central cells of the proembryo alone take part in 
forming the embryo. 
15. In the growth of the embryonic group the cap is thrust 
aside and a cylinder of meristematic tissue is organized. 
16. The upper portion of the embryonic cylinder functions 
as a secondary suspensor. ' 
17. The definitive embryo is organized out of a portion of the 
cells arising from the development of the embryo group of the 
proembryo. 
18. It is dicotyledonous, has resin ducts in the cortex but not 
in the wood, and is stored full of food materials (large proteid 
granules and smaller starch grains). 
19. The cells of the prothallus become very large and crowded 
with food. 
20. The nucellus persists and becomes a part of the testa of the 
seed. 
21. The embryo continues intraseminal growth after the seeds 
are shed. 
22. It is concluded that, so far as the pollination apparatus 
and seed structure are concerned, the Araucarineae could be 
derived from the lycopods, or perhaps from the Cordaitales, but — 
not from the Abietineae. The latter might be derived from 
a primitive mesozoic stock resembling the araucarians in respect 
to these features. 
STANFORD UNIVERSITY 
CALIFORNIA 
LITERATURE CITED 
ARNOLDI, W., Beitrage zur einigen Gymnospermen. Bull. Soc. Imp. 
Moscow 13:329. 1900 (cited from SEWARD and For», see below). 
BENSON, MARGARET, On the content of the pollen chamber of a specimen 
of Lagenostoma ovoides. Bot. GAz. 45:409-412. figs. 2. 1908 
3a. BurLincAME, L. LANCELOT, The morphology of Araucaria brasiliensis. 
I. The staminate cone and male gametophyte. Bor. Gaz. 55:97-114. 
pls. 4, 5. 1913. 
. The ovulate cone and female gametophyte. Bor. Gaz. 57: 
490-508. pls. 3. figs. 2. 1914. 
Cc . H., Mosses and Ferns. New York. 1905. 
———, Plant life and evolution. New York. rorr. 
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