GAMOPETAL^. 9 



DIVISION 2.— GAMOPETAL.E. 



A. OVARY INFERIOR (adherent to the calyx) or mainly so. 



Stamens 8 or 10: corolla-lobes 4 or 5: shrubs Ericaceae, 71 



Stamens 10, those alternate with small corolla- lobes sterile, inflexed Samoltta, 77 



Stamens 5 (rarely 4), united into a tube. 



Style 2-cleft: flowers in a flower-like head Compositse, 69 



Style and stigma entire: flowers irregular. (See p. 13) Lobeliaceae, 69 



Stamens 4 or 5, distinct, growing at the base of the corolla CampanulacesB, 70 



Stamens on the corolla-tube: leaves opposite or whorled. 



Leaves connate: corolla 4-lobed: stiff, prickly herbs Dipsacun, 69 



Leaves opposite, corolla mostly 5-lobed Caprifoliaceee, 66 



Leaves whorled or sometimes opposite: corolla 4-lobed RuDiacesB, 68 



Leaves unequal: prostrate: calyx corolla-like. (See Cal. Flora.) Abronia. 



Stamens only 3: corolla 5-6-lobed: calyx-lobes minute or none. Herbs. 



Leaves opposite; stamens distinct: erect herbs ValerianacesB, 68 



Leaves palmately nerved, alternate: tendril-bearing vines Cucurbitaceee, 64 



Stamens apparently 1, really 3 united: flowers monoecious Cucurbitaceas, 64 



B. OVARY SUPERIOR (free from the calyx) or nearly so. 



1. Flowers fegvilar or nearly so. 



* Stamens twice as many as the lobes of the corolla. 



Corolla bell-shaped or inflated-ovoid Ericaceae, 71 



Corolla deeply 5-8-cleft, the base united with the filaments Styracaceae, 77 



Corolla 5-cleft: pistils or styles 5: fleshy herbs Crassulaceae, 57 



* * Stamens as many as the corolla-lobes. 



a. Style 1, sti(jm<i 1 : leafless, root-parasite Pholisma, 75 



b. Style 1, stigma 1: leaves entire {lobed in the first and last). 



Leaves mostly radical, reniform: stamens unequal Romanzoffia, 87 



Leaves all radical; flowers spicate, colorless, scarious Plaotaginaceae, 109 



corolla re flexed: anthers purple-black Dodecathe.on, 76 



Leaves alternate. Spikes coiled: ovary in 4 parts Borraginaceae, 87 



Flowers rotate to funnelform or tubular Solanaceae, 92 



Tall shrub: 3 to 5 calyx-like bracts: flowers yellow. . . .Fremontia, 35 

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



Flowers white or pinkish in terminal cymose clusters Apocynaceee, 77 



Flowers in umbels: sepals and petals reflexed or rotate Asclepiadaceae, 77 



Leaves opposite, ovate, sessile: flowers rotate, axillary, solitary Anagallis, 77 



Leaves clustered at the top of the stem, bracts below: corolla rotate TriaitaJia^ 76 



