VOLUME XLVI NUMBER 3 
BOTANICAL (GAZETTE 
SEPTEMBER 1908 
THE STAMINATE CONE AND MALE GAMETOPHYTE 
OF PODOCARPUS 
CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY II4 
L. LANCELOT BURLINGAME 
(WITH NINE FIGURES AND PLATES VIII AND IX) 
Knowledge of the gametophytes of the Podocarpineae is at 
the present time limited to that contained in three brief papers. In 
1902 COKER (3) published an account of two species of Podocarpus; 
in June 1907 JEFFREY and CHRYSLER (5) added some new facts 
concerning Podocarpus and Dacrydium; and in September of the 
Same year Miss Youne (14) gave an excellent résumé of the sub- 
ject of the male gametophyte and added several new and interest- 
esting details for Dacrydium. CoKeEr records that in Podocarpus 
cortacea there are produced two primary prothallial cells, both of 
which may divide amitot ically; a tube nucleus; and a primary sperma- 
togenous cell, which gives rise to a stalk cell and a body cell. The 
body cell undergoes nuclear division and one of the nuclei is then 
©xtruded from the cytoplasm, leaving a single functional male cell. 
JEFFREY and CHRYSLER add to this the interesting details that from © 
the two primary prothallial cells there may arise by subsequent 
division as Many as eight prothallial cells. Of still greater interest 
1s the record of the “proliferation” of the primary spermatogenous 
cell, whereby there arise three cells placed transversely, the middle one 
of which is considerably larger than either of the others. Miss YounG 
Teports that in Dacrydium one or both of the primary prothallial cells 
may divide once. From the primary spermatogenous cell arise two 
Cells, one of which is usually sterile, the other of which functions as 
the body cell. The interesting observation is made that there is a 
161 
