71 MK. 0. BKNTHAi\t'a BOTANICAL MEMOBANDA. 



Iii Stylophorum (including Dicranostigma and Stylomecori) the 

 short lobes of the style are erect and alternate with the placentas, 

 representing, as in the Romneyece, the distinct summits of the car- 

 pellary leaves, but the stigmatic surface runs continuously over 

 the tops of the lobes and across the sinuses, where it is often a 

 little thickened. The backs of the lobes remain bare, and some- 

 times also the central cavity between the lobes. 



In Bocconia the lobes also represent the summits of the carpel- 

 lary leaves, and alternate with the placentas, but they are longer 

 and narrower, the stigmas cover their whole inner face, and are 

 continuous, but without any thickening at the sinus. 



In Hiinnemannia and Eschscholtzia, on the contrary, the stigma- 

 tic dilatation of the sinus assumes the form of one or two addi- 

 tional lobes at each sinus, either shorter than, or as long as the 

 principal lobes. This gives, in a bicarpellary pistil a 4-lobed or 

 G-lobed stigma, two lobes alternating with the placentas, the other 

 two or four opposite to them, singly or in pairs. 



In the majority of bicarpellary Papaveracece, such as Sangui- 

 naria, Chelidonium, some Dielytras and Corydalises, &c, the sum- 

 mits of the carpellary leaves, with their stigmatic margins, are 

 completely united in a more or less clavate tip, compressed from 

 front to back. The backs of the carpellary tips are at the same 

 time free from stigmas higher up than their margins or sinus; we 

 therefore observe only one thick stigmatic line running over the 

 top and down the united margins on each side, and consequently 

 immediately over, or opposite to, the equally marginal placentas. 



In Glaucium these decurrent lines or stigmatic sinuses are thick- 

 ened and project laterally, forming the horn-like stigmas opposed 

 to the placentas, more developed in that genus than in any other. 

 Similar lateral projections on a smaller scale may be observed in 

 several species of Gorydalis and Fumaria. 



In the pluricarpellary genera Argemone, Meconopsis, Cathcartia, 

 &c, the thickened summits of the carpellary leaves, with their stig- 

 matic margins, are again completely united and connivent, or turned 

 in as it were, the stigmatic margins or sinuses forming the radi- 

 atiug lobes of the stigma opposite the placentas, the bare intervals 

 being the backs of the tips of the carpellary leaves. 



Tins arrangement is still more marked in Papaver. On the 

 flat disk of P. somniferum, for instance, the radiating stigmas 

 represent the stigmatic margins of the summits of the carpellary 

 leaves, the tips of which unite in the centre of the disk. These 

 rays are therefore over the placentas. \ T ery different- is the radi- 



