Leaves alternate or all radical. 



Leaves pi'tiolute. Ovary consisting of three to Hve carpels, partly 

 coherent. Ovules orthotropous. Embryo obcordate, contained 

 in a vitellus or sac. Flowers perfect. SAURURACE K. p. 293. 



Leaves decurrcnt. Ovary two or three celled. Ovules many, am- 

 phitropous, very minute. Styles persistent. PODOSTEMONACE.*:. 



73. Ovary partly or wholly adherent to the calyx, or inferior. 99 

 < )vary or ovaries wholly free from the calyx, or superior. 



Leaves with stipules. 92 

 Leaves without stipules. 



Flowers imperfect, some staminate, some pistillate. 85 

 Flowers perfect. 



Carpels distinct or single. 80 



Carpels more than one, united into a single ovary. 



Growing in water. Flowers contained in a spatha. Carpels two 

 or three. Styles as many as the carpels, distinct, persistent. 

 Ovules numerous, very minute. PODOSTEMONACE.K 



Not aquatic. 



Anthers opening by valves which roll outwards. Flowers with a 

 fleshy disc at the bottom of the calyx. Ovary single, with but 

 one ovule, though formed of three carpels united by their edges. 



LAURACE.K. p. 290. 



Anthers opening lengthwise. 



Sepals two, distinct, colored, falling oft' soon after opening. Sta- 

 mens eight or more. Stigma two lobed. Juice milky. 



PAPAVERACE.E. p. 48. 

 Sepals more than two. Juice watery. 



Stamens few. 75 

 Stamens numerous. 



Placentas parietal. 74 

 Placentae central or basal. 



