POSITIVI! DEDOUBLEMENT. 



91 



In Geplialofaxus there was observed, on the slightly 

 elongated floral axis, which usually in its normal state 

 produces a single pair of ovules only, an extra pair 

 formed above ; but one of these is usually in the form 



•ov 



Pig. 100. — Cephalotaxus dru;pacea. a. The second whorl consists of 

 one ovule only b. Flower with second whorl of ovules {ov) 

 alternating with the first whorl of metamorphosed ovules (ov'). 

 br, tract. Diagrams. 



of a small foliar organ ; sometimes, when the two 

 normally-situated ovules are replaced by similar foliar 

 organs, the ovule occurring in the second whorl is the 

 only one in the flower (fig. 100). Celakovsky is doubt- 



PlG. 101. 



-Tri/olium repens (Dutch Clover). Flower with t<Vo or more 

 extra carpels (cp). stp, stipules. 



less correct in regarding, on comparative grounds, the 

 Taxaceous ovule as representing a carpel reduced to 

 one of its ovules ; so that in these abnormal flowers 

 there are two whorls of carpels represented. 



In those plants which have normally a reduced 



