OF THE GENERA. liii 



with long awns, at length separating elastically from tl^ summit to the 

 base. Geraniacece, p. 64. " 



Erodium. Sepals 5, equal, regular. Petals 5, mostly equal. Stamens 

 10 ; 5 outer ones shorter and sterile ; the perfect ones with a nectariferous 

 scale at the base. Styles persistent, bearded on tlie inside, at length spirally 

 twisted. Geraniacece, p. 65. 



Order III.— POLYANDRIA.— Many Stamens. 

 Obs. The genera of order from the Natural Order Malvacea:, p. 54. 



CLASS XVI.— DIADELPHIA.— Fi/amenis combined in two sets {except in 

 some of the 3cZ Order.) 



Order I.— HEXANDRIA.— 6 Stamens. 



Obs. The genera belong to the Natural Order Fuviariacece, p. 22. 



Order II.— OCTANDRIA.— 8 Stamens. 



PoLYGALA. Calyx of 5 sepals, 2 of them wing-shaped and colored. 

 Petals 3 — 5, united to the stamens, the lower one keel-form. Capsule com- 

 pressed, elliptic, obovate or obcordate. Seeds pubescent. PolygalacecB, 

 p. 42. 



Order HI.— DECANDRIA.— 10 Stamens. 



Obs. The genera of this order, with a few usually arranged under the 

 class Decandria, constitute the Natural Order Leguminosce, p. 72. 



CLASS XVIL— SYNGENESIA. 



Obs. The plants of this class, with a few exceptions, have 5 anthers 

 united into a single tube. They are further characterized by the flowers 

 being clustered together in heads and inserted upon a common receptacle, 

 which is surrounded by an involucre ; being usually known as Compound 

 Flowers. They form the Natural Order Composite, p. 154. 



CLASS XVIII.— GYNANDRIA. —Stamens situated upon the style or column 

 above the germ. 



Obs. The orders MONANDRIA and DIANDRIA constitute the Or- 

 chidacece, p. 343. 



Order III.— HEXANDRIA.— 6 Stamens. 



Aristolochia. Perianth tubular, ventricose at base, dilated at the apex 

 and ligulate. Capsule inferior, 6-sided, 1-celled, many-seeded. Aristolo- 

 chiacecB, p. 309. 



Order IV.— DODECANDRIA.— 12 or more Stamens. 



AsARUM. Perianth campanulate, mostly 3-parted. Stamens 12, placed 

 on an epigynous disk. Anthers adnate to the middle of the filaments. 

 Stigma 6-parted or lobed. Capsule 6-celled, many-seeded. Aristolochiacea, 

 p. 309. 



