334 



ORGANOGKAPHY 



rent to the ovule. Tliis raphe or cord of nutritive vessels pass- 

 ing from the placenta, and which by its expansion forms the 



Fig. 721. Fig. 722. 



i 



Fig. 721. Anatropous ovule of the Dandelion, h. Hi- 

 lum. /. Micropyle or foramen, h. Nucleus, s. Base of 



the nucleus, ch. Chalaza. r. Raphe. Fig. 722. 



The campylotropous ovule of the Mallow in its differ- 

 ent stages of development. From Maout. In a the 

 curvature is commencing, in h it is more evi<lent. in c, 

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

 niculus. J). Primine. s. Secundine. n. Nucleus. 

 ex. Exostome. end. Endostome. 



chalaza, is generally situated in anatropous ovules (in which 

 alone it is clearly distinguishable) on the side which is turned 

 towards the placenta. The relative position of the raphe in 

 other ovules has been fully detailed in a paper by Mr. Clark 

 read before the Linn.Tan Society, but the subject is too com- 

 plicated to be treated of in tliis volume. The anatropous 

 ovules are very common ; they may be found in the Eanunculus, 

 Apple, Cucumber, &c. 



The three kinds of ovules mentioned above, are those only 

 which arc commonly distinguished by special names; .but there 

 are two others, which appear to be but slight modifications 



of the anatropous 

 Fig. 724. 



Fig. 723. 



ovule, to which 

 the names of 

 amphitropous and 

 semi - anati-opous 

 have been re- 

 spectively given. 

 The amphitro- 

 pou.<i, or, as it is 

 also called /itf/ero- 

 tropmis or tranS' 

 Longitudinal section verse OVulc, is 



of the semi-anatropous ovule of produccd, wllCtt 

 Mcconostignta pinmitijulum. f. , i -i,,™ f ;„ 

 Funiculus. n. Nucleus. i>. I'lG nuum, /, IS 

 Primine. sec. Secundine. s. 



Embryi>-«ac. r/i. Chaluz.n. »•. Raphe, in. Micropyle. 



From Schleidcn. Fig. 724. Amphitroi)ou9. or 



trau»ver»c ovule of Ltmna trinuka, divided lungitudi- 



iiiilly. The letters have the same references as the 



luat. From Schleiden. 



{f'J- 724). 



one side of the 

 ovule, and the 

 micropyle, H». and 

 ehalaza,c//. placed 

 transversely to it 

 In this case the hilum is connected to the chalaza 



