13 
Carpels one to each flower. Stigma with a cup-like covering. 
BRONONIACEEi. 
Carpels more than one to each flower. 
Carpels separate. Crassulace^e. p. 137. 
Carpels combined into one fruit. 
Flowers perfect, having both stamens and pistils. 
Styracacees. p. 220. 
Flowers imperfect, some staminate, some pistillate. 
Papaya CEAt. 
24 . — Carpels more than one in each flower. 26 
Carpel one in each flower. 
Anthers separate. 25 
Anthers united. 
Ovule erect. Composites, p. 179. 
Ovule suspended. Caly'ceracees. 
25 . — Fruit an acliene, with the rudiments of two others. 
Valerianace.e. p. 177. 
Fruit a single achene, without rudimentary ones. 
Fruit crowned with the calyx, and covered with an involucel. 
Dipsa^ce/e. p. 178. 
Fruit not crowned. No involucel. Lorantiiacees. p.292. 
26 . — Leaves without stipules. 27 
Leaves with stipules. 
Stipules between opposite petioles. Cinchoxace.-e. p. 173. 
Stipules forming tendrils. Cucurbitacees. p. 158. 
27 . — Anthers united. Lobeliacees. p. 208. 
Anthers separate. 
Stamens two. Columelliacees. 
Stamens more than two. 
Anthers opening by pores. Vaccintace.-e. p. 211.f 
Anthers opening by slits. 
Stigma with a covering. Goodkniacee;. 
Stigma without a covering. 
Stamens numerous. Belvisiaceec. 
Stamens two, attached to the pistil. Sty'lidiacEee.- 
Stamens four or five. 
