30 CONTKIBUTIONS FROM THE NATIONAL HERBAEIUM. 



EE. Ovules 2 or more in each cell. 

 F. Stamens hypogynous ; disk none, but separate glands or a gynophore 

 sometimes present. 

 Leaves opposite or verticillate, entire. 



Flowers unisexual, regular CLUSIACEAE. 



Flowers perfect, irregular VOCHYSLA.CEAE. 



Leaves alternate. 

 Leaves stipulate. 



Calyx segments imbricate in bud. 



Stamens more than 10. Petals 4 ; ovary borne on a long 



gynophore; stigma sessile CAPPABIDACEAE. 



Stamens 10. Leaves entire ERYTHROXYLACEAE. 



Calyx segments valvate or open in bud. 



Petals valvate in bud. Stamens 4 or 5, free ; ovary sessile. 2 



or rarely 3 or 4-celled ; vines with tendrils VITACEAE. 



Petals imbricate or convolute. 



Ovary stipitate; petals (4) imbrieate—CAPPARLDACEAE. 



Ovary sessile or nearly so ; petals usually convolute in bud. 



Anthers 1-celled, dehiscent by a pore or a longitudinal slit. 



Filaments adnate; petals 5; seeds sometimes covered 



with long hairs. 



Leaves simple; flowers usually calyculate; filaments 



united to the apex or nearly so MALVACEAE. 



Leaves digitate or simple; flowers not calyculate; fila- 

 ments united only at the base or in the lower half. 



BOMBACACEAE. 

 Anthers 2-celled, dehiscent by 2 pores or longitudinal slits. 

 Filaments more or less united ; staminodia present. 



STERCTJLIACEAE. 

 Filaments free, or slightly united at the base, but stami- 

 nodia then absent TILIACEAE. 



Leaves estipulate. 



Stamens more than twice as many as the petals. 



Ovary long-stipitate ; ovules numerous CAPPARIDACEAE. 



Ovary sessile; ovules 3 or few. 



Style distinct; petals free or nearly so THEACEAE. 



Style none; petals united at the apex. 



MARCGRAVIACEAE. 

 Stamens as many or twice as many as the petals. 

 Leaves compound. 



Filaments free; leaves gland-dotted RUTACEAE. 



Filaments united; leaves not gland-dotted. 



Leaflets 3, entire OXALIDACEAE. 



Leaflets 5 or more MELLACEAE. 



Leaves simple. 



Ovary 1-celled. Leaves entire ERYTHROXYLACEAE. 



Ovary 2 to 7-celled. 



Calyx lobes valvate in bud STERCTJLLA.CEAE. 



Calyx lobes imbricate in bud. 



Stamens 5 MARCGRAVIACEAE. 



Stamens 10 to 14 CLETHRACEAE. 



FF. Stamens hypogynous, but inserted at the base or on the surface of 

 a disk, or perigynous. 



