MORPHOLOGY OF REPRODUCTIVE ORGANS 189 



monooarpellary ovary has two sutures, one which corresponds 

 to the union of the margins of the lamina of the carpellary leaf, 

 and is turned towards the axis of the plant ; and another which 

 corresponds to the midrib of the lamina, and is directed to- 

 wards the floral envelopes or the circumference of the flower ; 

 the former is called the ventral (fig. 399, •us), the latter the 

 dorsal (ds) suture. 



The Pistil. — When the gynoecium is formed of but one 

 carpel, as in the Broom {fig. 396) and Pea (fig. 406), it is, as we 



Fig. 400. Fig. 401. Fig. 402. 



Fig. 403. 



Fig. 404. 



Fig. 400. A portion of the pistil of Daphne Laureola. y. Smamit of the 



ovary, t. Style terminated by a stigma, s. Fif/. 401. A portion of the 



pistil of Plantago saxatilis. o. Summit of the ovary, t. Style, s, s. Bi- 

 lateral stigma. The above figures are from Jussieu. Fig. 402. Pistil of 



the Periwinkle {Viiica). o. Ovary, t. Style, s. Hairy stigma, d. Disc. 

 Fig. 403. Ventral view of the pistil of Isoptjrum hicerrtatunif showing the 



double stigma. Fig. 404. Pistil of wheat {Triticum sativum) surrounded 



by three stamens and three squamulse, sp. Two feathery styles or stigmas 

 arise from the top of the ovary. 



have already seen, called simple, and the terms gyncecium or 

 pistil, and carpel are then synonymous ; when there is more than 

 one carpel, the pistil or gynoscium is termed compound [figs. 

 395 and 410). In a compound pistil, again, the carpels may be 

 either separate from each other, as in the Stonecrop (fig. 284) 

 and Pheasant's-eye (fig. 410); or united into one body, as in 

 the Primrose (fig. 395), Carnation (fig. 405), and Tobacco (fig. 

 397) : in the former case the pistil is said to be apocarpous, in 



