HI 



The calyx is composed of four equal sepals all of which are 

 plainly auricled. The corolla is similarly composed of four 

 equal petals all of which are saccate and true spur-petals in 

 every essential including the interior striations. The androe- 

 cium is composed of four stamens, each of which bears a pair of 

 anther-sacs and one appendage. It is also noteworthy to men- 

 tion that of the four sacs of the corolla, one encloses two stamen- 

 appendages, or one from each of the two adjacent stamens, two 

 enclose one appendage each and one apparently does not enclose 

 any. The carpels are four in number with four equally developed 

 placentae. The style immediately above the ovary is practically 

 straight and a distinct dilated stigma with two lobes is formed 

 at its distal extremity. The beak or pore-tube is situated in 

 the center of the stigma and its longitudinal axis is in the same 

 plane as that of the style. The opening of the pore-tube, instead 

 of being circular in outline, is represented by what might be 

 called an oblong orifice whose greater diameter lies at right- 

 angles to that of the stigmatic lobes. 



While this fully developed type of flower represents the extreme 

 of variation, it is represented, in this case at least, in but a small 

 percentage of the flowers. 



Descriptiox of Intermediate Types of Flo\\'ers. 



The intermediate flower types are quite variable and are repre- 

 sented by an infinite number of forms with respect to the number 

 and arrangement of their constituent parts. They appar- 

 ently form a complete series from that of the normal flower 

 to that of the extreme peloric type. In the spring of 1920 a 

 total of 573 flowers were picked quite at random and a study of 

 these gave the following ratios: no saccate petals — ^^o flowers, 

 one saccate petal — 203 flowers, two saccate petals — 157 flowers,. 

 three saccate petals — 128 flowers, four, saccate petals — 84 

 flowers, and five saccate petals — i flower. A number of these 

 flowers have been dissected and critically studied and as a 

 result of the analyses it becomes possible to make the following 

 deductions. 



I. Each of the floral whorls mav exhibit modifications inde- 



