328 Szabo .— The Development of the Flower of the Dipsacaceae . 
sion which may be called the ovary-groove. The situation of the protuber¬ 
ance may be seen also in PL VII, P'igs. 7, 8 (g). This protuberance is horse¬ 
shoe-shaped. The flexure of the ‘ horseshoe ’ is lying on a higher level ; its 
situation is median posterior or diagonal; its two extremities become 
gradually lower and they border a slit which opens into the ovary-groove. 
The shape of the ovary-groove may be seen in PL VII, Fig. 8. This state of 
development is in accordance with Payer's (6) drawings on PL 131, Figs. 
13-16. The horseshoe-shaped protuberance, however, is shown as trans 
Text-fig. 1. Median longitudinal Text-fig. 2. Median longitudinal section of the 
section of the flower-protuberance of flower-protuberance of Ceplialaria elata in a more developed 
Cephalaria elata (from a microphoto- stage. a, stamen attached to the basal part of the 
graph). br , bract ; c and c\ the corolla ; b, bract; c and c', the median-posterior and the 
median-posterior and the median-an- median-anterior lobe of the corolla; g, the beginning 
terior petal outgrowth; i, involu- of the development of the carpel outgrowth; i, in- 
cel outgrowth; b, calyx outgrowth. volucel; b, calyx; stele, the formation of the procambial 
x 80. tissue in the stalk, x 16. 
verse and the depth of the ovary-groove has been wrongly figured. At this 
stage its depth is never greater than that shown in PL VII, Fig. 8, i.e. 
the bottom of the ovary-groove is at the most at the level of the union of 
the calyx and corolla ; it only becomes deeper later. 
The growth of the horseshoe-shaped protuberance of the carpel and 
the formation of the ovary-groove may be traced gradually in PL VII } 
Figs. 9-13. The development of the style is figured in PL VII, Figs. 14-19, 
