G. R. Wieland — Notes on Living Cycads. 



l 



333 



Figure 1. — Zamia floridana DC. $ 



Miami, Florida, Nov. 15, fully six months previous to fecundation. 

 la. — Entire plant, x y%. 



a. main trunk (underground). 



b. position of an old branch. 



c. secondary tap root running out from the main foliage-bearing 

 trunk, which is itself secondary. 



d. primary or original tap root. 



16. — Cone (ten-ranked) seen in la. x ^. 



lc. — Transverse section of a different cone, x %. Eight sporophyl- 

 lar ranks are seen. These cones vary much in size as well as 

 in number of sporophyllar ranks, which may be odd or even. 

 The number of sporophylls in each rank also varies. 



lc?. — Single sporophyll with ovules attached. x %. 



le. — Pinnule showing dichotomous venation, x $, 



limiting especially the spaces occupied by the ovules. These 

 do not hence reach the immense size of those borne free on the 

 carpels of the less compactly set strobili of the genus Cycas, 



