246 



EXOGENS. 



Sub-Class IV. EPIGYNOUS EXOGENS. 



Flowers ov ^ 9 ; stamens growing to the side of either the calyx or 



corolla ; ovary inferior or nearly so. 

 Campanales. — Flowers dichlamydeons, monopetalous ; embryo with little 



or no albumen. 

 Myrtales. — . Flowers dichlamycleous, polypetalous ; 'placentce. axile ; 



embryo with little or no albumen. {Occasionally mono- 



chla7nydeous.) 

 Cactales. — Flowers dichlamydeous, polypetalous; placentce parietal ; 



embryo with little or no albumen. 

 Gross ALES. — Flowers dichlamydeous ^ polypetalous; seeds 7iumerous, 



minute; embryo small, lying in a large quantity of 



albumen. 

 CixcHOXALES. — Flowers dichlamydeous, monopetalous; embryo minute, 



lying iri a large quantity of albumen. 

 Umbellales. — Floicers dichlamydeous, p)olypetalous; seeds solitary, large; 



embryo small, lying iii a large quantity of albumen. 

 As AR ALES. — Flowers monochlamydeous ; embryo small, lying in a 



large quantity of albumen. 



■'J' The following artificial arrangement of the Alliances of Exogens will render it more easy to compare 



their characters. 



Sub-class L— DICLINOUS 



Albumen abundant. 

 Ovary inferior . 

 Ovary superior. 

 Carpel single . 

 Cai-pels several, disunited. 

 Carpels consolidated. 

 Placentas axile 

 Placentae parietal 

 Albumen wanting, or in small 

 Ovary inferior. 

 Placentas axile 

 Placentae parietal . 

 Ovary superior . 



EXOGENS. 



Garryales. 



Urticales. 

 Menisperimaxes. 



euphorbiales. 



Papayales. 



quantity. 



Quernales. 

 cucurbitales. 



Amentales. 



Sub-class n.— HYPOGYNOUS EXOGENS. 



a. Albumen abundant. 



Flowers achlamydeous . Piperales. 

 Flowers monodichlamydeous. 

 Embryo external . . Nymphales. 

 Embryo internal. 

 Stamens 00 . , . Ranales. 

 Stamens definite. 

 Flowers unsymme- 1 ■„ 



trical in the ovary } Berberales. 

 Flowers sj-mmetri-) t-. 

 cal in the ovary . j Ericales. 

 5. Albumen wanting, or in small quantity. 

 Embryo external. 

 Carpels solitarv, or dis- "i ^ 



tinct . . . . ) C'he^opodales. 

 Carpels consolidated , Silenales. 

 Embryo internal. 

 Placentae axile or central. 

 Flowers unsymmetrical.SAPiNDALEs. 

 Flowers symmetrical. 



Calyx valvate . . Malvales. 

 Calyx imbricated. 

 Stamens 00 . , Guttiferales. 

 Stamens definite. 

 Corolla twisted . Geraniales. 

 CoroUa imbri-) „ 



Cated . .JRUTALES. 



Placentae parietal or sutural. 

 Embryo curved or "» „ 



spiral . . . jCisTALEs. 

 Embryo straight . . Tiolales. 



JlGNOJflALES. 



I Sub-class IIL— PERIGYNOUS EXOGENS. 



a. Albumen abundant. 



Placenta free, central . Cortusales. 



Placentae axile or parietal . Gentianales. 

 &. Albumen w^inting, or in small quantity. 

 Embryo external . . Ficoidales. 

 Embryo internal. 



Flowers unsjTnmetrical. 

 Fruit capsular or bac- "i gj„^ 



cate . . . J 

 Fruit nucamentaceous. Echiales. 

 Flowers sj-mmetrical. 

 Monochlamydeous. 

 Carpels solitary . Daphnales. 

 Carpels consolidated. Rhamnales. 

 Dichlamydeous. 

 Polypetalous. 

 Carpels consoli-^ 

 dated. Seeds > Rhamnales. 

 definite . .J 

 Carpels apocarpous.RosALES. 

 Carpels consoli- 

 dated. Seeds 00 , 

 Monopetalous. 



Capsular or bac- \ c^. . ,r . 



cate. . JSOLANALES. 



Nucamentaceous . Echiales. 

 Tricoccous . . Rhamnales. 



Sub-class IV — EPIGYNOUS EXOGENS. 



. Albumen abundant. 



Monochlamydeous . . Asarales. 

 Dichlamydeous, monone- 1 ^ 



talOUS . . . J-CORxNALES. 



Dichlamydeous, polypetalous. 



Seeds solitary . . . Umbellales. 



Seeds 00. . . . Grossales. 

 Albumen wanting, or in small quantity. 

 Placentae axile. 



Monopetalous . . . Campanales. 



Polj^etalous . . .Myrtales. 

 Placenta? parietal . Cactales. 



• Saxifragales. 



