BENNETTITEAE 583 



Figs. 208 and 209). The connate sheath extends up 

 to about the height of the top of the gynaecium ; at 

 this level the stamens become free from each other ; 

 they are large and complex structures about 10 cm. 

 in length, if straightened out ; they are always found, 



Fig. 207. — Cycadcoidca dacotensis. — Longitudinal section through the summit of an 

 unexpanded bisexual flower. In the middle is the upper part of the o villiferous cone, 

 showing the zone of ovules and intcrseminal scales and the terminal tuft. To the 

 right and left the compound stamens are seen, with their tips infolded parallel to the 

 sides of the central cone. The upper curved portion of each stamen is missing (cf. 

 Fig. 206, s). The pinna, each hearing a series of synangia, are cut longitudinally. On 

 the outside of all are the bracts. X 2. From a photograph. After Wieland. 



however, to be infolded in a circinate manner, the 

 sporophylls curving over towards the gynaecium, so 

 that their deflexed tips reach down almost to its base 

 (see Figs. 206 and 207;. Each stamen is a pinnately 

 compound leaf with about twenty pairs of alternate 



