AN ANALYTICAL KEY TO THE NATURAL 

 FAMILIES. 



A. FLOWERING or PELENOGAMOUS. Plants producing true flowers and 



seeds. (B, page 25.) 

 I. Angiosperms, those plants hearing the ovules in a closed ovary ; coty- 

 ledons normally 2 or 1 (includes all but the Pine and Cycad families). 

 (11, page 24.) 

 + Dicotyledons or Exogens, loith wood in a clrclz or in concentric 

 annual circles or layers around a central pith ; netted-veined leaves; 

 and parts of the flower mostly in fives or fours. Cotyledons typically 2. 

 (++ page 23.) 

 O. Piilypetalou^ Division, typically with both calyx and corolla, the latter of 



loholly separate petals. (00, page 17. OOO, page 21.) 

 * More than 10 stamens, more than twice the number of the sepals or divi- 

 sions of the calyx. (* * page 15.) vag^ 

 Stamens monadelphous, united with the base of the corolla: anthers kid- 

 ney-shaped, one-celled .... MALLOW FAMILY, 85 

 Stamens monadelphous at base : authers two-celled : leaves twice 



pinnate •. . MIMOSA SUBF. 122 



Stamens monadelphous at base: anthers two-celled: leaves not pinnate — 

 Leaves with joint between petiole and blade, which is translucent- 

 dotted (Citrns) RUE F. J)8 



Leaves without a joint and not trauslucent-dotted CAMELLIA F. 84 

 'Stamens not monadelphou.'^ — 



Pistils uumei'ous, but imbricated over each other and cohering in a 



mass on a long receptacle .... MAGNOLIA F. 45 

 Pistils several, immersed iu hollows in a top-shaped receptacle, 



(Nelumbo) WATKR LILY F. 51 

 Pistils numerous and separate, at least their ovaries, but concealed 

 in a hollow flesh)/ receptacle — 

 Which bears sepals or bracts over its surface: leaves simple, 



opposite CALYCANTHUS F. 1G3 



Wliich is naked and imitates an inferior ovary : leaves alternate, 



compound (Rosa) ROSE F. 141 



Pistils nume?-ous or more than one, separate, on the receptacle — 



Stamens borne on the calyx ROSE F. 141 



Stamens borne on. the receptacle — 



Leaves centrally peltate : aquatic herb (Brasenia"). 



WATER LILY F. 51 

 Leaves peltate near the margin : woody climber, 



MOONSEED F. 48 

 Leaves not peltate, quite entire : tree^ or shruhs — 



Spicy anise-scented: petals nniiierons: seed solitarv, 



(Illi.'ium) MA(4XOLIA F. 45 

 Unpleasantly scented when bruised : |)elals i\ in 2 ranks : 



seeds .several . . . CUSTARD AIM'LE F. 48 

 Leaves not peltate: herbs, or if woody-stenimed Ww leaves 



are compound CROWFOOT F. 34 



13 



