APOSTASIS. 441 
and are, in some cases, united by their margins, so that 
a spiral sheet or tube is formed, surrounding the axis. 
This frequently occurs in double flowers of the Chinese 
primrose, Primula sinensis. 
Engelmann’ figures a case wherein the calyx of 
Anagallis phenicea was separated by a rather long in- 
ternode from the corolla, and a like illustration in 
Torilis Anthriscus. 

Fic. 209.—Flower of Delphinium, showing apostasis of carpels, from 
lengthening of the thalamus, Xc. (Cramer.) 

1 Loe. cit., tab. 2, f. 6. 
