lU , GAMOPETAL2EL 



c. Style one or none, stigmas two. 



Leaves opposite or whorled, sessile, entire Gentianacese, 79 



Leaves opposite, lobed: flowers small in spikes Verbenacese, 105 



Leaves alternate or radical, 3-foliolate: corolla bearded Menyanthes, 80 



Leaves alternate. Flowers not axillary Hydrophyllacese, 84 



Flowers in a head with acerose bracts Gilia, 80 



Flowers funnelform: twining or creeping vines. Convolvulus, 91 



) ( eves radical: flowers solitary on scapes Hes])erochiron, 87 



if. Style 1, stigmas 3 Polemoniaceaa, 80 



ft. Style 2-cleJl Hydrophyllaceae, 84 



/. Styles 2: leaves simple and alternate or none. 



1'loweis solitary, axillary, white: leaves silky Cressa, 91 



^lowers clustered on filiform, leafless orange or yellow twining stems Cuscuta, 91 



Flowers 5 or G lines long: shrubs or wood-based herbs Hydrophyllaceee, 84 



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



Stamens 4: flowers in slender spikes: leaves opposite, lobed Verbenacese, 105 



Stamens 3: style 3-cleft: sepals 2: leaves opposite, entire Montia, 32 



Stamens 2 or 4: ovary 2-celled ScropliulariaceaB, 93 



2. Flowers irregular: style 1; stigma entire or 2-lobed. 



Leaves or scales not opposite. 



Corolla flattened, heart-shaped: stamens 6, united in 3's~ Dicentra, 19 



Corolla curved: leafless root-parasites: stamens 4 Orobanchaceae, 104 



Corolla more or less 2-lipped: ovary 2-celled: stamens 2 to 5 . . Scrophulariacese, 93 



Corolla 2-lipped, spurred: ovary 1-celled: stamens 2: aquatic. . Lentibulariaceae, 104 



Leaves opposite or whorled: stamens 2 or 4. 



Ovary 2-celled ^ScrophulariaceaB, 93 



Ovary 4-parted, forming 4 seed-like nutlets ^ Labiataa, 105 



Ovary 2-4-lobed: small flowers in spikes or heads. .... Verbenacese, 105 



DIVISION 3. 



A. OVARY INFEBIOB (calyx adherent) or apparently so. 



Leaves cordate: calyx 3-lobed: ovary 6-celled. (See Cal. Flora) . . AristolochiaceED. 



Leaves palmately lobed tendril-bearing vines Cucurbitaceae, 64 



Leaves pinnate: calyx-tube 3-4-angled, prickly Rosacese, 48 



