PHANEKOGAMIA 



579 



These two families, neither of which is represented in Europe, stand in close relation 

 to the Convolvulaceae as well as to the Boraginaceae, bridging over the gap between 

 them. The Hydrophyllaceac also exhibit a near affinity to the following order. 



Order 6. Personatae 



Flowers hypogynous, mostly zygomorphic ; typically with the 

 formula K5, C5, A5, G(J), but usually with a reduced andrcecium. 

 Stamens inserted on the corolla; ovary dimerous, bilocular, rarely 

 with false dissepiments, usually with numerous ovules. Leaves 

 alternate or opposite. 



Included in this order are herbs and woody plants, generally 

 with conspicuous flowers. The corolla is commonly bilabiate. In 

 most instances the 

 andrcecium is 

 reduced to four 

 stamens, disposed 

 in two pairs of 

 unequal length ; 

 more rarely only 

 two stamens are 

 present. The fruit 

 is most frequently 

 a capsule with 

 albuminous, or 

 sometimes exalbu- 

 minous seeds. 



The Solanaceac 

 are, phylogenetically, 

 probably the oldest 



Fig. 564. — Solatweeae. 

 Floral diagram 

 (Petunia). 



Fig. 505. — Xicotiana Tabacum. o, Flower; b, corolla, cut open and 

 spread out fiat; c, ovary ; d and e, young fruit, (u, d, <:, nat. size ; 

 e, d, x 2.) 



family of the order, and in their generally actinomorphic flowers and pentamerous 

 andrcEcia they exhibit a close affinity to the Tubiflorae, particularly to the Hydro- 

 phyllaceac, in which the gynoecia have a similar oblique position. The Solanaceac 

 are also allied to the Boraginaceae, with which they are connected by the small 

 family Nolanaceac. (Plaited corolla, seeds and unequally paired leaves, as in the 

 Solanaceac; fruit a schizocarp, as in the Boraginaceae.) Between the Solanaceac 



