Fig. 391. — Gnettim gnemon: A, young ovulate strobilus; B, older strobilus with one 

 mature seed; C and D, sections of young strobili; //, hairs; E, young ovule; n, nucellus; /, 

 inner integument; r, rudimentary outer integument; p, perianth; F, nucellus with three 

 megaspore mother-cells; G, advanced ovulate flower; /, inner integument; 0, outer in- 

 tegument; p, perianth; H, free nuclear stage of female gametophyte; /, female gameto- 

 phyte with free nuclei above and cellular tissue below; a second gametophyte is shown 

 at the upper right; /, fertilization; t, pollen tube;/, two eggs; and there are several free 

 nuclei of the gametophyte; A', late embryo sac; g, zygote; C, X24; Z), X45; G, X^iy, 

 I, X50; J, X340; K, X50. — After Lotsy,^" except F, which is after Strasburger>^ 



