320 



MORPHOLOGY. 



There are but few special observations to be made respecting 

 the structure of the internodes of the flower ; it is in general like 

 that of annual steins ; but it must be remarked that they often 

 possess fewer vascular bundles, and these of simpler development. 

 It is more particularly to be mentioned, that the internodes (as 

 also some of the foliar organs) within the flower, frequently do 



183 



c. 184 



185 



186 



181 Echinops ruthenica. A capitolum with flower-buds (a), in vertical section. The 

 shady part is the axial organ (the peduncle). 



}si Ranunculus procerus, A flower in vertical section, a, Calyx ; 6, corolla ; c, sta- 

 mens ; d, carpels. The shaded part is the axial organ (peduncle, torus). 



183 Ephemerum Matthioli. A flower, in vertical section, a, Calyx ; b, corolla ; c, sta- 

 mens ; d, carpels, forming the germen, pistil, and stigma (which is cut off) ; e, seed- 

 bud. The shaded part is the axial organ (spermophore). 



184 Helianthus annuus. A capitulum in vertical section, a, Leaves of the invo- 

 lucre; 6, bracts (pa/e) ; c, flowers. The shaded part is the axial organ (discoid 

 peduncle). 



183 Geum rivale. Flower in vertical section. a, Calyx ; b, corolla ; c, stamens ; 

 d, carpels. The shaded part is the axial organ (discoid receptacle-disc), and in its 

 centre a gynophore. 



186 Arisarum australe. Pistil in vertical section, a, Carpels, forming the side walls 

 and covering of the germen, the style, and the stigma ; b, seed-buds. The shaded part 

 is the axial organ (discoid spermophore), forming at the same time the base of the 

 germen. 



