194 
dimerous ovary, in the numerous seeds, in the free styles and in the anatro- 
pous ovules. But in other respects, it is comparable with the Caryophyllacen. 
115 Hydrostachyacee: Related to the Podostemonacee. 
116 Crassulacese”: This family is somewhat related to the Elatinaces 
the isomerous flowers and in the habit, as can be seen in Tillea aquatica L. 
in which is at present referred to the Crassulacesw, but is closely related to 
Elatine. In general, it is connected with the Saxifragacese more closely than 
with any other family. 
117 Cephalotaceze”: Near the Saxifragacers and Crassulaces. 
118 Saxifragacese”: Certainly quite close to the Crassulacese and Cuno- 
niacese, and then, to the Hamamelidaces and Rosaces. But, the family has 
some relation to the Trochodendracess in the separate carpels, in the perigy- 
nous insertion and in the small embryo; then, to the Kceberliniacee in the 
placenta, with numerous seeds in many series. Further, the resemblance of 
this family to the Begoniaceze can not be denied, as there are agreements in 
both families, in the perigynous insertion, in the parietal placenta, in the 
small seeds, in the dehiscence of the fruit, and in the shape of the leaves. 
119 Pittosporacee”: R. Brown compares this family with the Celastra- 
cesee and Rhamnacese. Dr CaNDOLLE places it between the Polygalaces and the 
Caryophyllaces, while RicHarp and ScHNITZLEIN insist upon the existence of 
a relation between it and the Caryopbyllacee. ENDLICHER and EICHLER con- 
sider it better to bring it back again near the Celastracee ; but BENTHAM and 
Hoorer class it with the Polygalaces, Tremandracese and Vochysiacex in the 
Polygalinese. Van TrecHEM compares it with the Umbelliferee and Araliacee 
in the peculiar distribution of resin-ducts in the root and in the formation of 
lateral roots. Baton says that there is no absolute difference between the 
floral structure of the Pittosporacese and that of the Saxifragaces. Some re- 
lations seem to exist between the Pittosporacese and the Hamamelidacee in 
the presence of resin -ducts. 
120 Brunelliaceew”: Somewhat near the Cephalotaces, this family is 
1) Nat. Pi-fam. UL—2, a, p. 28. 2) 1. u TIL—2, a, p. 40. 
3) Lo. IIL—2, a, p. 45. 4) Nat. Pfl.-fam. IIL—2, a, p. 108. 
5) Nat. Pfl.-fam. Nacht. p. 184. 
