20 ANALYTICAL KEY 



K. Stamens attached to the base or tube o£ the corolla. 



Saprophytic herbs without green foliage Monotropoideae, 626 



Not saprophytic ; foliage green. 

 Trees, shrubs, or undershrubs; anthers mostly 2-celled. 

 Filaments united into 1-5 groups. 

 Ovary superior Ternstroemiaceae, 670 



Ovary at least partly inferior Stybacaceae, 649 



Filaments free from each other. 

 Style 1 Ericaceae, 625 



Styles 4 Ebenaceae, 648 



Herbs; anthers 1-celled. 

 Filaments united into a tube Malvaceae, 566 



Filaments distinct, 2 at each notch of the corolla Adoxa, 761 



I. Stamens not more numerous than the corolla-lobes L. 

 L. Stamens of the same number as the corolla-lobes and opposite them. 

 Corolla appendaged with scales inside ; ovary 5-celled ; trees 



or shrubs Sapotaceae, 648 



Corolla not appendaged with scales inside ; ovary 1-celled ; 

 herbs. 

 Style 1 ; fruit a several-many-seeded capsule Primulaceae, 643 



Styles 5 ; fruit a 1-seeded utricle Plumbaginacbae, 643 



L. Stamens alternate with the corolla-lobes or fewer M. 

 M. Ovary free from the calyx-tube (superior) N. 

 N. Corolla regular O. 



O. Stamens as many as the corolla-lobes P. 

 P. Ovaries more than 1, or, if 1, deeply lobed Q. 

 Q. OTaries 2, or, if 1, 2-homed. 



Stamens united Asclepiadaceae, 663 



Stamens distinct. 

 Stipules or stipular membrane or line between 



opposite leaves ; ovary 2-horned Loganiacbae, 652 



Stipules none ; ovaries 2. 

 Leaves kidney-shaped, alternate Dichondra, 669 



Leaves not kidney-shaped, chiefly opposite 



Apoctnaceae, 661 

 Q. Ovary deeply 47-lobed. 



Leaves alternate Boraginaceae, 679 



Leaves opposite Labiatae, 690 



P. Ovary 1, not deeply lobed E. 

 E. Ovary 1-celled. 



Seed 1 ; corolla scarious Plantaqinacbae, 743 



Seeds several-many. 

 Leaves entire, opposite Gentianaceae, 654 



Leaves toothed, lobed, or compound. 

 AVhole upper surface of corolla white-bearded ; 



leaflets 3, entire Menyanthes, 660 



Corolla not conspicuously bearded; leaves, if 

 compound, with toothed leaflets 



Hydkophyllaceae, 676 

 E. Ovary 2-10-celled. 



Leafless twining parasites Cuscuta, 671 



Leaves opposite, their bases connected by a stipular 



line LoGANiACEAB, 652 



