DICOTYLEDONS. 66 1 



Order 8. ColumniferfiB. 

 Families: i. Sterculiaceae, 



2. Byttneriaceae, 



3. Tiliaceae, 



4. Malvaceae. 



Order 9. Tricoccas \ 

 Families: i. Euphorbiaceae, 



a. Euphorbieae, 



b. Acalypheae; 

 2. Phyllanthaceae, 



a. Phyllantheae, 



b. Buxineae. 



D. Centrospermce. Corolla usually wanting (except in Fam. 6) ; stamens fewer 

 or more often more numerous than the sepals, in the last case generally double as 

 many (4 or 6) ; ovary usually superior and unilocular, with one or more basal often 

 campylotropous ovules, less often multilocular with central placentation. 



Order 1. Caryophyllineae. 

 Families: i. Nyctagineae, 



2. Chenopodiaceae, 



3. Amaranthaceae, 



4. Phytolaccaceae, 



5. Portulacaceae, 



6. Garyophylleae : 



a. Paronychieae, 



b. Sclerantheae, 



c. Alsineae, 



d. Sileneae. 



E. Discophorce. Ovary inferior (Order i) or half inferior or even superior, and 

 then (Order 2, Family 5) carpels distinct; carpels as many as or fewer than 

 sepals and petals (often two) ; when the ovary is inferior or half inferior a necta- 

 riferous disc usually occurs between the styles and the stamens; stamens equal 

 in number to sepals and petals (Order i) or twice as many, or even a still larger 

 number; calyx-limb usually obsolete in Order i ; seed generally with copious 

 endosperm. 



Order 1. UmbelliflorsB. 

 Families: 1. Umbeiliferae, 



2. Araliaceae, 



3. Cornaceae. 



Order 2. SaxifraginesB ^. 

 Families: i. Saxifragaceae (including Hydrangeae, 

 Escallonieap, and Gunoniaceae), 



2. Grossulariaceae (?), 



3. Philadelpheae (?), 



4. Francoaceae (?), 



5. Crassulaceae (?). 



V. Perigyn^. 

 Flower displaying a tendency towards the perigynous structure. An annular body 

 is elevated from the floral axis bearing the perianth and the stamens, and enveloping 

 the gynaeceum as a cup-, saucer-, or urn-Uke receptacle ; or it becomes adherent in its 



^ The position of this order is doubtful. 



* The position of the families marked (?) is doubtful. 



