lO 0A1I0PETAL.E. 



e. Style one or none, stigmas two. 



LoayeB opposite or whorled, sessile, entire GentianacesB, 79 



Leares opposite, lobed: flowers small in spikes Verbenaceee, 105 



Leaves alternate or radical, S-foliolate: corolla bearded Menyantlies, 80 



Leaves alternate. Flowers not axillary Hydrophyllacesa, 84 



Flowers in a head with aoeroae bracts Gilia, 80 



Flowers funnelform: twining or creeping vines Convolvulus, 91 



Jliftt7e8 radical: flowers solitary on scapes Uesperochiron, 87 



i. Style 1, stigmas S Polemoniacess, 80 



o. Style S-cleft Hydrophyllacese, 84 



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



Jlowers solitary, axillary, white; leaves silky Cressa, 91 



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



Flowers 5 or 6 lines long: shrubs or wood-based herbs Hydropliyllaoeas, 84 



* * * Stamens/ewer than the lobes of the sUghily irregular corolla. 



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



Stamens 3: style 3-cle£t: sepals 2: leaves opposite, entire Montia, 32 



Stamens 2 or 4: ovary 2-oelled Scrophulariaceaa, 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-paraaites; stamens 4 Orobanchaceas, 104 



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



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



Leaves opposite or whorled: stamens 2 or 4. 



Ovary 2-oeUed ScTophulariacesB, 93 



Ovary 4parted, forming 4 seed-like nutlets LabiatEe, 105 



Ovary 2-4-lobed: small flowers in spikes or heads ... .^ VerbenacesB 105 



DIVISION 3.— APETAL^ 



A. OVAEY INFERIOR (calyx adherent) or apparently so. 



Leaves cordate: calyx 3-lobed: ovary 6-celIed. (See Cal. Flora) . . AristolocHaceBB. 



Leaves palmately lobed tendril-bearing vines Cucurbitacese 64 



Leaves pinnate: calyx- tube 3-4-angled, prickly RosacesB 43 



