191a. Climbing plant with heart-shape perianth 2a, in =FUMARIACEAE=, p. 41.
191b. Erect plant, with spreading perianth 3b, in =BERBERIDACEAE=, p. 40.
192a. Corolla composed of united petals --193.
192b. Corolla composed of separate petals --208.
193a. Stamens 2 or 4 =SCROPHULARIACEAE=, p. 101.
193b. Stamens 3; climbing vines =CUCURBITACEAE=, p. 112.
193c. Stamens 5 --194.
193d. Stamens 6 2a, in =FUMARIACEAE=, p. 41.
193e. Stamens 8 22b, in =ERICACEAE=, p. 85.
193f. Stamens 10 --207.
193g. Stamens very numerous =MALVACEAE=, p. 72.
194a. Ovaries 2; flowers orange-red, in umbels 7a, in =ASCLEPIADACEAE=, p. 91.
194b. Ovary 1, deeply 4-lobed; flowers in racemes =BORAGINACEAE=, p. 93.
194c. Ovary 1, not deeply lobed --195.
195a. Climbing or scrambling vines --196.
195b. Not climbing or scrambling --198.
196a. Flowers about 1 cm. wide --197.
196b. Flowers 2-8 cm. wide =CONVOLVULACEAE=, p. 91.
197a. Leaves 1 cm. wide or less 2b, in =CAMPANULACEAE=, p. 112.
197b. Leaves 2 cm. wide or more 4a, in =SOLANACEAE=, p. 100.
198a. Flowers solitary, either terminal or axillary --199.
198b. Flowers in terminal cl.u.s.ters --201.
199a. Calyx concealed by 2 bracts =CONVOLVULACEAE=, p. 91.
199b. Calyx not completely concealed by bracts --200.
200a. Ovary inferior, appearing as a swelling below the calyx at the base of the flower, 3-celled; stigma 3-lobed =CAMPANULACEAE=, p. 112.
200b. Ovary superior, located in the center of the flower =SOLANACEAE=, p. 100.
201a. Some or all filaments hairy --202.
201b. Filaments not hairy --203.
202a. Leaves lobed or divided =HYDROPHYLLACEAE=, p. 93.
202b. Leaves not lobed 2, in =SCROPHULARIACEAE=, p. 101.
203a. Anthers close together, longer than the filaments 2, in =SOLANACEAE=, p. 100.
203b. Anthers separate from each other --204.
204a. Leaves compound or very deeply lobed --205.
204b. Leaves simple or with shallow lobes only --206.
205a. Leaf-segments linear or oblong, irregular =HYDROPHYLLACEAE=, p. 93.
205b. Leaves truly compound with separate leaflets 1a, in =POLEMONIACEAE=, p. 92.
206a. Flowers greenish-yellow =SOLANACEAE=, p. 100.
206b. Flowers blue, violet, white, or intermediate tints =CAMPANULACEAE=, p. 112.
207a. Leaves simple =ERICACEAE=, p. 84.
207b. Leaves compound =OXALIDACEAE=, p. 64.
--208--
208a. Petals 4 --209.
208b. Petals 5 --212.
208c. Petals 6 or more --227.
209a. Stamens 4 or 8 --210.
209b. Stamens 6, 4 long and 2 short =CRUCIFERAE=, p. 42.
209c. Stamens 9 or more =CAPPARIDACEAE=, p. 47.
210a. Leaves compound =ROSACEAE=, p. 51.
210b. Leaves simple --211.
211a. Ovary 1, inferior, appearing as a swelling below the calyx =ONAGRACEAE=, p. 78.