ANALYTICAL KEY. 
XXV 
Leaves when opposite without stipules. 
Stamens free from the corolla or nearly so ; style one. Ericaceae, 47 
Stamens almost free from the corolla; style none. Ilicine^e, 13 
Stamens in the sinuses of the corolla; style 1. Diapensiace.e. 
Stamens inserted on the tube of the corolla- 
Four; pod 2-celled, circumcissile. . . Plantaginace^e, 71 
Four; ovary 2-4-celled ; ovules solitary. . Verbenaceae, 63 
Five or rarely more. 
Fruit of 2 or 4 seed-like nutlets. . . . Boraginaceae, 58 
Fruit a few-seeded pod. 
Calyx 5-cleft ; style 3-lobed or cleft. . Polemoniace^:, 57 
Sepals 5; styles 1 or 2, entire or 2-cleft; seeds 
• large, only one or two in a cell. . Convolulaceae, 59 
Fruit a many seeded pod or berry. 
Styles 2. . . Hydrolea. in Hydropiiyllaceae. 
Style single ..... SOLANACEyE, - 59 
-f — i- Stamens fewer than the lobes of the corolla. 
Stamens 4, didynamous. 
Ovary 2-celled ; the cells several-seeded. . . Acanthaceae. 
Ovary 2-4 celled ; the cells 1-seeded. . . Verbenaceae, 63 
Stamens only 2 with anthers; ovary 4-lobed. 
Lycopus, in Labiatae. 66 
Stamens 2, rarely 3 ; ovary 2-celled. 
Low herbs ; corolla scarious, withering on the pod. 
Plantaginaceae, 71 
Herbs; corolla rotate, or somewhat funnel-form, and 
slightly irregular. . Veronica, in ScROPHULARiACEyE, 63 
Shrubs or trees ; corolla perfectly regular. . Oleaceae, 51 
Division III. APETALOUS; corolla (and sometimes calyx) wanting. 
Flowers not in catkins. 
1. Ovary or its cells containing many ovules. 
Ovary and pod inferior (i. e. calyx-tube adherent to the ovary). 
Six-celled; stamens 6-12. . . . Aristolochiaceae, 74 
Four celled ; stamens 4. . . Ludwigia, in Onagrace^e. 
One-celled, with parietal placentae. 
Chrysosplenium, in Saxifragaceae. 
Ovary and pod wholly naked (there being no calyx). 
Two-celled, 2-beaked ; flowers capitate; tree. Hamajielideae, 23 
■ Two-celled, many-ribbed ; aquatic herb. . Podostemaceae. 
