254 INSERTION OR POSITION OF THE STAMENS. 
: 
lateral to the pistil instead of below it, as in the Cherry (fig. 
544), they, as well as the corolla, are said to be perigynous. 
When the calyx is adherent to the ovary so that it appears to 
Fie. 543. Fig. 544. 
Fie. 542. 
Fig. 542. Apocarpous pistil of the Crowfoot (Ranunculus), with two stamens 
arising from the thalamus below it, or hypogynous. Fig. 543. Vertical 
section of a flower of the Primrose (Primula), showing epipetalous stamens. 
The pistil in the centre has an ovary witha free central placenta, one style, 
and a capitate stigma. Fig. 544. Vertical section of the flower of the 
Cherry, showing the perigynous stamens surrounding the pistil. 
rise from its apex, the intermediate stamens and petals or corolla 
are also necessarily placed on the summit, and are said to be 
epigynous, as in the species of Campanula (fig. 545), and Ivy. 
Fig. 545, Fie. 346. Fig. 547. 
Fig. 545, Vertical section of the flower of a species of Campanula, with epi- 
gynous stamens.— Fg. 546. Flower of O7chis mascula. The column in 
the centre is formed by the union of the stamens and style-—/ig. 547. 
The pistil and stamens of Birthwort (A7istolochia). The ovary is seen 
below, and the stamens above united into a column with the style, 
It sometimes happens that the stamens not only adhere to the 
ovary or lower part of the pistil, as in the epigynous form of 
insertion, but the upper part of the stamen or stamens and 
