62 VASCULAR PLANTS. 



stigma 2-cleft. Capsules membranaceous, lo- 

 culicidal. 



If . flowers violet, white. 



Family XX Polemoniaceae 



^Estivation imbricate. Ovary 3-locular; style 

 3-cleft. Embryo straight; cotyledons foliaceous. 



1. Polemonium, Tournef. 



Corolla rotate. Stamens ascending, filaments 

 dilated at the base. Seeds oo. 

 0. 2£. flowers blue, white. 



2. Gilia, Ruiz & Pavon. 



Corolla funnel or salver-shaped. Stamens 

 straight, equally inserted. . U • 



3. Collomia, Nutt. 



Corolla salver-shaped, with long tube. Sta- 

 mens unequally inserted. . 



Family XXI. Convolvulaceae. 



^Estivation contorted. Ovary 2, 3 or 4-locu- 

 lar. Embryo curved. Cotyledons foliaceous, 

 conduplicate, corrugate. 



l. Convolvulus, L. 



Calyx 5-cleft, persistent. Corolla funnel-form, 

 5-angulate, 5-plicate. Loculi of the capsule 2- 

 ovulate. U • 



