XLHl] 



SEEDS 



121 



the nucellus of Cycadean seeds. The portion of the Torreya seed 

 (fig. 684, V) below the free part of the nucellus has, according to 

 Oliver, been produced by the intercalation of a new basal region 

 that has pushed up the chalaza. Cephalotaxus^ has plum-like seeds 

 similar to those of Torreya. In Phyllocladus^ (fig. 675, E) an ovule 

 enclosed in a papery epimatium occurs in the axil of a succulent 

 bract, and in Taxus a terminal ovule is borne on a short shoot 



Fig. 688. Torreya nucifera, transverse section of seed; a, arillus; v, vascular 

 tissue; sc, outer zone of integument in which the hard shell will be formed; 

 i, inner part of integument; mw, wall of megaspore; n, nucellus; ps, pro- 

 thaUus. (After Oliver.) 



without any megasporophylls. In Podocarpus^ the megasporo- 

 phylls are few and a part or whole of the reproductive apparatus 

 is fleshy : the strobilus of P. Totara (fig. 684, G) consists of 3—4 

 bracts two of which are usually fertile. Similarly the strobilus 

 of P. imbricata is formed of 2—4 bracts with swollen bases forming 

 the receptacle; in the section shown in fig. 684, I, one bract is 



1 Gard. Chron. Oct. 14, 1895, p. 717. ' Robertson (06). 



3 Pilger(03); Brooks and Stiles (10); Stiles (12); Gibbs(12); Sinnott (13). 



