ORGANS OF EEPEODUCTION, 



325 



ment of an anatropous onile may be well seen in Chelido- 

 nium. In anatropous ovules, a connexion is always maintained 

 between the chalaza and the hilum by means of a vascular cord 

 or ridge, called the raphe {fig. 724, r), which is generally con- 

 sidered as an elongated funiculus adherent to the ovule. This 

 raphe or cord of nutritive vessels passing from the placenta or 

 funiculus, and which by its expansion forms the chalaza, is 



Fig. 725. 



Fig. 724. Vertical section of an anatropous ovule of 

 the Dandelion, h. Hilum. /. Micropyle or fora- 

 men. 71. Nucleus, s. Base of the nucleus, ch. 



Chalaza. r. Raphe. Fig. 725. The campylotro- 



pous ovule of the Mallow in its different stages of 

 development. From Maout. In a the curvature is 

 commencing, tn 6 it is more evident, in c still 

 more evident, and in d it is completed. /. Funi- 

 culus, p. Priniine. s. Secundine. n. Nucleus, ex. 

 Exostome. end. Endostome. 



generally situated in anatropous ovules (in which alone it is 

 clearly distinguishable) on the side which is turned towards 

 the placenta or funiculus. Anatropous ovules are very com- 



Fig. 726. 



Fig. 727. 



Fig. 726. Longitudinal section of the semi-anatropous ovule of Meconch 

 stigma pinnatifidum. /.Funiculus, n. Nucleus, p. Primine. ^ec. Se- 

 cundine. s. Embryo-sac. ch. Chalaza. r. Raphe. m. Micropyle. 

 From Schleiden. Fig. 727. Section of the amphitropous or trans- 

 verse ovule of Lemna trisidca, divided longitudinally. The letters 

 have the same references as the last. From Schleiden. 



mon; examples may be fo\md in the Dandelion, Apple, and 

 Cucumber. 



The three kinds of ovules mentioned above, are those only 



