OVULES. 367 



four outer segments to the perianth, four petals, of 

 wliicli two were lip-like, four stamens, three of which 

 were rudimentary, and an ovary with four parietal 

 placentae.^ 



The following list will serve to show in what plants 

 this general augmentation of parts has been observed 

 most frequently : 



Ranunculus. Sambxicus ! 



Clematis ! *Primula ! 



Delphinium. Anagallis ! 



Brassica ! Lycium. 



Ruta. Solanum. 



Acer ! Symphytum. 



Prunus ! Syringa ! 



Rosa ! Linana. 



Rubus. Chenopodium. 



Philadelphus ! *Paris ! 



Chiysosplenium. Convallaria ! 



Umbelliierae, sp. pi. I Allium. 



Fuchsia ! *Lilium ! 



(Enothera. *Tulipa ! 



Adoxa. Omithogalum. 



Bryonia. *Gragea ! 



Cucumis ! Tradescantia ! 



Campanula ! Orchidese, sp. pi. ! 



Increased miinber of ovnles or seeds. This appears not to 

 be of Yerj frequent occurrence, at least in those plants 

 where the number of these organs is normally small ; 

 where, as in Primula, the ovules and seeds are pro- 

 duced in large quantities, it is not practicable to ascer- 

 tain whether the number be augmented or not in any 

 particular case. Very probably, the attachment or 

 source of origin of the ovules determines, in some mea- 

 sure, their number. Thus, in the case of marginal 

 placentation the number must be limited by the narrow 

 space from which they proceed, whereas in parietal 

 and free central placentation the ovules are generally 

 numerous. In the latter case, however, it will be 

 remembered that solitary ovules are not rare. An 

 increased number of ovules is generally remarked in 

 conjunction with some other change, such as a folia- 



' Linnsea,' 1842, p. 389, c. ic. 



