ORGANS OF REPRODUCTION. 



293 



but one ; thus we speak of a bifid, trifid, &c., stigraa, or a 

 bilobate, trilobate, Sec, stigma, according to the number and 

 appearance of the divisions. The term lobe is usually ap- 

 plied when the divisions are thick, as in the Lily {fig. 633), 

 and Melon (fig. 634); or when these are flattened and some- 

 what strap-shaped, as in the Compositae (fig. 634, 2), the stigma 



Fig. 632. Fig. 633. 



Fig. 634, 2. 



Fig. 634. 



Fig. 632. Pistil of Flax {Linum). Fig. 



6S3. Pistil of Lily, with one style and 



a trilobate stigma Fig. 634. Lobed 



stigma of Melon. Fig. 634, 2. Pistil 



of Chrysanthemum, with one style and 

 a two-lobed stigma, the lobes with hairs 

 at their extremities. 



is fissured or cleft ; or Avhen flattened into plates or bands they 

 are lamellre, as in the Bignonia {fig. 635) and Mimulus. The 

 number of these divisions in the majority of instances, corre- 

 sponds to the number of carpels of which the pistil is com- 

 posed; and if the latter organ is many-celled, the number of 

 cells will generally correspond also, to the divisions of the stig- 

 ma. Thus the five-cleft stigma of some Campanulas, indicates 

 that there are five cells to the ovary, and that the pistil is 

 formed of five carpels. In the Graminete {fig. 586) and Com- 

 positae {figs. 631 and 634, 2), however, we have a bifid stigma, 

 and but one loculus or cell in the ovary; this probably arises 

 from the non-development or abortion in the ovary of one of 

 the carpels. 



The lobes assume different appearances : thus, they may be 

 smooth, or thick and fleshy, as in the Melon {fig. 634); or 

 feathery, as in many Grasses {fig. 586), or fringed or laciniate, 

 as in Crocus, and Rumex {fig. 636), &c. 



When the stigmas are united, the number of parts in the 

 compound stigma is usually indicated by radiating fuiTOws, or 

 grooves. When the stigmas unite and form a compound body 

 u3 



