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hypogynoU9 disk; style simple or divided, terminal; stigma bifid; ovules attached to 2 parie- 

 tal or fungous stalked placentae, either definite or indefinite. Fruit capsular, few- or many- 

 eeeded, invested with the permanent calyx. Seeds definite or indefinite; embryo taper, lying 

 towards the end of the albumen, which is abundant and somewhat cartilaginous; its radicle 

 superior and next the hilum. — Herbaceous hispid plants. Leaves either opposite or alternate, 

 but in the latter case lobed. Peduncles opposite the leaves. 



Affinities. Very near Boragineae and the orders which have been recently 

 separated from it, with which Hydroplrylleae agree in the roughness of their 

 leaves and many other marks of obvious resemblance. They are, however, 

 known by their undivided 1-celled ovarium, terminal style or styles, and ovula 

 (if definite) attached to two stalked fungous placentae, which arise from the 

 base of the cell, having their ovula on their inner face, or (if indefinite) attached 

 to parietal placentae. They are further characterized by the presence of 2 

 scales or lamellae at the base of each lobe of the corolla, the nature of which 

 is unknown. The former mode of placentation is highly curious, and, as far 

 as I know, unlike that of any other plants. 



Geography. American herbaceous plants, found either in the north or 

 among the most southern of the southern provinces ; not known beyond that 

 continent. 



Properties. Unknown. 



Examples. Hydrophyllum, Nemophila, Ellisia, Eutoca, Phacelia. 





