14 GAMOPETAL^E. 



* * * Stamens as many as the corolla-lobes. 



a. Style 1, stigma 1: leafless, root-parasite. Pholisma, 140 



b. Style 1, stigma 1: leaves entire (lobed in thejirst and last.) 



Leaves mostly radical, reniform: stamens unequal Romanzoffia, 152 



Leaves radical or crowned on roots tocks: flowers salverform. . . . Primulaceae, 49 



Leaves all radical; flowers spicate, colorless, scarious Plantaginaceae, 67 



corolla reflexed: anthers purple-black. Dodecatheon, 50 



Leaves alternate. Spikes coiled: ovary in 4 parts Borraginaceae, 57 



Flowers rotate to funnelform or tubular Solanaceae, 60 



Tall shrub: 3 to 5 calyx-like bracts: flowers yellow. .Fremonlia, 100 



Tall shrub: slightly irregular, nearly white or rose ) - ; cac gg 40 



flowers > 



Small herb: minute axillary flowers, the parts in ) .. , 



> or riiniiiaceaB, "ly 



fours ; ' 



Leaves opposite (at least below) entire: juice milky: ovaries 2; stigmas united. 



Flowers white or pinkish in terminal cymose clusters Apocynacese, 50 



Flowers in umbels: sepals and petals reflexed or rotate Asclepiadaceae, 51 



Leaves oppposite, ovate to lanceolate, sessile; flowers rotate, axillary . Primulaceae, 49 



Leaves clustered at the top of the stem, bracts below: corolla rotate . Primulaceae, 49 



e. Style one or none, stigmas two. 



Leaves opposite or whorled, sessile, entire Gentianaceae, 51 



Leaves opposite, lobed : flowers small in spikes Verbenaceae, 67 



Leaves alternate or radical, 3-foliolate: corolla bearded Menyanthes, 145 



Leaves alternate. Flowers not axillary Hydropyllaceae, 54 



Flowers in a head with acerose bracts Gilia, 145 



Flowers funnelform: twining or creeping vines Convolvulus. 156 



Leaves radical: flowers solitary on scapes Hesperochiron, 152 



d. Style 1, stigmas 3 Polemoniaceae, 51 



e. Style 2 deft Hydrophyllaceae. 54 



/. Styles 2: leaves simple and alternate or none (i. e. Parasite). 



Flowers solitary, axillary, white: leaves silky Cressa, 156 



Flowers clustered on filiform, leafless orange or yellow twining stems Cuscuta, 156 



Flowers 5 or 6 lines long: shrubs or wood-based herbs Hydropliyllaceae, 54 



g. Styles 5: calyx not green, petals nearly distinct . , Plumbaginaceae, 49 



* Stamens fewer than the lobes of the regular or slightly irregular corolla. 



Stamens 4: flowers in slender spikes: leaves opposite, lobed Verbenaceae, 67 



Stamens 3: style 3-cleft: sepals 2: leaves opposite, entire Montia, 97 



