34 



69. Monoecious. Fertile flowers in cone-like spikes. Stamens four. 

 Stigmas two, long, thread-like, spreading. Fruit consisting of 

 one-celled, one-seeded nutlets attached to the bracts of the cone. 

 Stipules falling oft' early. BETULACE.T:. p. 306. 

 Dioecious. 



Flowers with a three to five-parted perianth. Stamens opposite the 

 lobes of the perianth. Ovary surrounded at base by a glandu- 

 lar ring, one celled, containing two ovules. Stigma flat, three to 

 five lobed. Fruit a one-seeded, berry-like drupe, crowned with 

 the persistent stigma. STILAGINACK K. 



Perianth four to six leaved, imbricate in the bud. Stamens two to 

 five. Stigmas two to four. Ovary two celled, with two ovules 

 in each cell. SCEPACE.K 



70. Having a perianth. 73 



Having no proper calyx or corolla. 



Carpels two or more. 71 

 Carpel single. 



With a style. Stem jointed. Leaves sessile, in whorls, much 



divided. Monoecious. Aquatic. CERATOPHYLLACE K. 

 Style none. 



Ovule erect. Embryo in a vitellus or sac. Fruit a berry. 



PIPERACEJ:. 

 Ovule hanging. Embryo not in a vitellus. Fmit a drupe. 



CJILOIIANTIIACE.E. 



71. Growing in the water or in wet places. 72 

 Growing on dry land. 



Ovaries numerous, one celled. Stamens many, densely crowded. 

 Stipules none. Monoecious trees. PLATANACE.E. p. 300. 



Ovary two or three celled, with one ovule in each cell. Seeds with- 

 out wings. EUPHORBIACE.E. p. '293. 



72. Leaves opposite, sessile, upper and lower ones often different. 

 Stipules none. Styles two. Ovary four celled, with one ovule 

 in each cell. CALLITRK n \< i: i 



