AN ANALYTICAL KEY TO THE NATURAL 



FAMILIES. 



A. FLOWERING OR PILENOGAMOUS. Plants producing true flowers and 

 seeds. (B, page 25.) 



I. Anoiosperms, those plants bearing the ovules in a closed ovary ; coty- 

 ledons normally 2 or 1 {includes all but the Fine and Cycad families). 

 (II, page 24.) 



■f Dicotyledons or Exogens, with wood in a circle 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 2;5.) 



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

 wholly separate petals. (OO, page 17. OOO, page21.) 



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

 sions of the calyx. (* * page 15.) pa,;e 



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



ney-shaped, oiie-ctelled .... MALLOW FAMILY, 85 

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



pinnate . MIMOSA SUBF. 122 



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

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

 dotted (Citrus) RUE F. 98 



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

 Stamens not monadelphous — 



Pistils numerous, but imbricated over each other aud cohering in a 



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

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



(Nelumbo) WATER LILY F. 51 

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

 in a hollow fleshy receptacle — 

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



opposite CALYCANTHUS F. 163 



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



compound (Rosa) ROSE F. 141 



Pistils numerous 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 : trees or shrubs — 



Spicy anise-scented: petals numerous: seed solitarv, 



(Illicium) MAGNOLIA F. 45 

 Unpleasantly scented when bruised : petals 6 iu 2 ranks : 



seeds several . . . CUSTARD APPLE F. 48 

 Leaves not peltate : herbs, or if woody-stemmed the leaves 



are compound CROWFOOT F. 31 



18 



