168 SUMMER FLOWERS. 



46. Gentianaceous Plants. GENTIANACE^E. 



* Leaves opposite ; (terrestrial herbs) . 

 f Stamens four. 



(204) Erythrsea calyx divided to the base ; style simple ; 



flowers pink or red. 



(205) Grentiana calyx not divided below the middle ; style two- 



lobed ; flowers blue. 



tt Stamens eight. 



(206) Chlora corolla rotate, yellow. 



** Leaves alternate ; (aquatic herbs) . 



(207) Villarsia leaves entire, orbicular; flowers yellow. 



47. Solanaceous Plants. SOLANACE.E. 



* Fruit dry, capsular. 



(208) Datura corolla funnel-shaped, with a long tube; capsule 



prickly, four-valved. 



(209) Hyoscyamus corolla obliquely funnel-shaped ; capsule 



smooth, opening transversely with a lid. 



** Fruit fleshy ', baccate. 



(210) Solanum corolla rotate ; anthers porose, joined into a 



cone. 



(211) Atropa corolla bell-shaped ; anthers distinct. 



48. Boraginaceous Plants. BORAGINACE.E. 



* Corolla tube open or naked at the orifice. 

 t Stamens protruding ; corolla irregular. 



(212) Echium corolla bell-shaped; the throat dilated; nuts 



wrinkled, attached by a flat triangular base. 



