VASCULAR PLANTS. 47 



Family IX. Apocynaceae. 



Stamens not monadelplious; anthers introrse. 

 Corolla contorted in aestivation and its lobes 

 oblique. Lactescent plants. 



l- Apasynum, Tourn. 



Corolla campannlate, 5-cleft, with five scales 

 opposite the lobes and near their base; throat 

 naked. Stamens inserted on the base of the 

 corolla; filaments very short; anthers sagittate, 

 with their connective adhering to the stigma. 

 Ovaries 2, with 5, hypognyous scales. Fruit 

 2-follicular; seeds with a hairy arillus. 



2£ . flowers white, rose-colored. 



Family X. Gentianaceae. 



Anthers introrse. Lobes of the corolla not 

 oblique. Ovary 1, with 2 parietal placenta?, 

 septicidal or by the meeting of the placenta? 

 2-locular, oo-ovulate. Plants not lactescent. 



i- Erythraea, p ers. 



Calyx tubular, angulate, 5-cleft. Corolla fun- 

 nel-shaped, withering but not deciduous. With- 

 ering anthers spirally contorted. Style filiform, 

 deciduous. Capsule 1-locular, half divided by 

 the prominent parietal placentae. 



. flowers pink. 



