GENERA OR FAMILIES. 35 



** Florets all perfect (i.Q. both staminate and pistillate) and 

 ligulate. 



(G2) Leontodon — pappus pilose, filiform, soft, deciduous, beak 

 long ; involucre of fruit reflexed. 



24. Primulaceous Plants. Primulace^e. 



(63) Primula — leaves all radical ; flowers solitary or umbellate, 



on radical peduncles ; ovary superior. 



25. Apocynaceous Plants. ApocyxNace^. 



(64) Vinca — corolla hypocrateriform, with a cylindrical tube, and 



flat spreading limb of oblique segments. 



26. Gentianaceous Plants. Gentianace.e. 



* Terrestrial plants with opposite leaves. 



(65) Gentiana— calyx not divided below the middle; stamens 



five ; style two-lobed, persistent. 



** Aquatic plants, with alternate leaves. 

 (6^ Menyanthes — leaves trifoliolate ; corolla fringed within. 



27. Boraginaceous Plants. Boraginace^. 



* Corolla without scales at tlie mouth of the tube, 



(07) Piilmonaria — calyx tubular, the lobes not reaching to the 

 middle ; stamens included in the tube of the funnel-shaped 

 corolla. 



** Corolla having the mouth of the tube more or less closed 

 by subulate scales. 



(68) Symphytum— corolla tubular-campanulate, with five small 

 teeth ; filaments entire. 



D 2 



