54 



THE AMERICAN BOTANIST 



Ericaceae. (G. 626. B. 692). 

 Ebenaceae. (G. 648. B. 721) 



Fumariaceae. (G. 416. B. 437) 

 Leguminosae. G. oOO. B. 523) 



Malvaceae. (G. 566. B. 617) 



Compositae. (G. 770 B. 889, 913) 



KEY TO THE FAMILIES OF THE SYMPETALOUS DICOTYLEDONES 



1 Stamens more numerous than the corolla lobes (2). 

 2 Stamen filaments distinct. 



Flowers perfect ; style one. 

 Flowers seldom perfect ; styles four. 

 2 Stamen filaments more or less united (3). 

 3 Stamens ten or fewer. 



Filaments united into two equal sets. 

 Filaments united into a split tube around the style. 

 3 Stamens more than ten. 



Filaments united into a tube about the styles. 

 Filaments united only at base into one or more sets. 



Calyx free from ovary. Trenstroemiaceae. (G. 570. B. 523) 



Calyx adherent at least at base. Styracaceae. (G. 649. B. 722) 



1 Stamens fewer than the corolla lobes or of the same number (4). 

 4 Ovary inferior, adherent to the calyx tube (5). 

 5 Stamens cohering by their anthers. 

 Flowers in an involucrate head. 

 Flowers not in a head. 



Corolla regular ; flowers imperfect ; \ ines. 

 Corolla irregular; flowers perfect; herbs. 



3 Stamens entirely distinct. 



Leaves alternate ; flowers regular. 

 Leaves opposite. 



Stipulate or verticillate. 



Exstipulate. 



Ovary two to five celled. 



Ovary one-celled. 



Stamens two or three. 

 Stamens four. 



4 Ovary superior, free from the calyx tube (6). 

 6 Flowers irregular (7). 



7 Ovary deeply four-parted. 



Leaves opposite, stem square. 

 Leaves alternate, stem round. 



7 Ovary entire (8). 



8 Four ovuled, four or fewer seeded. 

 8 Many ovuled several or many seeded (9) 

 9 Trees, shrubs or vines. 

 Seeds not winged. 

 Seeds w^inged. 



Flowers violet-colored. 

 Flowers not violet colored. 

 9 Herbs. 



Leafless parasites. 

 Leafy, not parasites. 



Fruit one-celled ; leaves at base. 

 Fruit more than one celled. 

 Seeds borne on hooks. 

 Seeds not on hooks. 

 Corolla imbricate. 

 Corolla valvate or plicate. 



Caprifoliaceae (G. 754. B 869) 



Valerianaceae (G. 761. B. 876) 

 Dipsaceae (G. 763. B. 88^)) 



Labiatae. G. 690. B. 779) 

 Borraginaceae. (G. 679. B. 766) 



Verbenaceae. (G. 688. B. 776) 



Ericaceae. (G. 626. B. 692) 



Scrophulariaceae. (G. 717. B. 818) 



Bignoniaceae. (G. 740. B. 8.50) 



Orobanchaceae. CG. 7.39. B. 848) 



Lentibulariaceae. (G. 736. B. 845) 



Acanthaceae. (G. 742. B. 853) 



Scrophulariaceae. (G. 717. B. 818) 

 Solanaceae. (G 712. B. 809) 



