47.

--185--

185a. Perianth consisting of one circle of parts only (usually
considered to be the calyx) --186.

185b. Perianth consisting of both calyx and corolla --192.

186a. Leaves with sheathing stipules encircling the stem above the
base of every leaf =POLYGONACEAE=, p. 25.

186b. Leaves without sheathing stipules --187.

187a. Leaves entire --188.

187b. Leaves toothed, lobed, or compound --190.

188a. Stamens 5 =SANTALACEAE=, p. 24.

188b. Stamens 6 --189.

188c. Stamens 10 =PHYTOLACCACEAE=, p. 30.

189a. Perianth-lobes 3; perianth-tube curved =ARISTOLOCHIACEAE=, p. 25.

189b. Perianth-lobes 6, spreading 4a, in =LILIACEAE=, p. 11.

190a. Stamens 5 =UMBELLIFERAE=, p. 80.

190b. Stamens 6 --191.

190c. Stamens more than 6 =RANUNCULACEAE=, p. 35.

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. Flowe