260 



MANUAL OF BOTANY 



b. Carpels more than one, combined. 

 Seeds esalbnminons. 



Calyx imbricate . . . Ulmacece. 



Seeds albuminous. 



Styles or stigmas 2. Leaves not dotted Ulmacece. 



2. Flowers unisexual. 



a. Carpel solitary. 



Cells of anther perpendicular to the fila- 

 ment . . . Stilaginacece. 

 Cells of anther parallel to the filament. 

 Embryo straight. 



Sap watery. Stipules small. Seeds 



albuminous . . UrticacecB. 



Sap milky. Stipules large. Seeds ex- 

 albuminous .... Artocaj'paceie. 

 Embryo hooked. 



Sap watery. Seeds without albumen Cannahinacece 

 Sap milky. Seeds with albumen . MoracecB. 



h. Carpels more than one, combined. 

 Flowers amentaceous. 

 Seeds arillate. 



Stamen 1 . LacistemacetB 



Stamens more than 1 . Scepacece, 



Seeds not arillate BetulacecB. 



Flowers not amentaceous Euphorbiacees 



b. Leaves exstvpulate, 

 1. Flowers hermaphrodite. 

 u. Carpel solitary. 

 Anther-valves recurved LauraceiP. 



Anthers slit. 



Leaves covered with scales Elceagnacetp. 



Leaves not so covered. 

 Calyx long or tubular. 



Hardened at base . . Nyctaginacece. 



Not hardened in any part. 



Stamens in the points of the sepals Proteacece. 

 Stamens not in the points of the 



sepuls . , . Tltt/melacece. 



Calyx short, not tubular, or but 

 shghtly so. 

 Flowers in involucels . Polygonacete. 



Flowers not in involucels. 



Calyx dry and coloured Amarantacece . 



Calyx herbaceous or succulent. 

 Stamens hypogynous or nearly 



so . . . Gkenopodiacece 



Stamens perigynous . . . BasellacecB. 



