ANALYTICAL KEY. 



3. Stamens as many as the lobes rf the corolla and alternate lo'dh them, or fewer. 

 * No (jreen herbage. 



Corolla regular; stamens free; seeds numerous, minute Monotropeae, G9 



Corolla regular; stamens on tlic tube; twining parasites Convolvulaceae, 8G 



Corolla irregular; stamens 4 in pairs Orobanchaceae, 9G 



* * With ordinary green herbage. 

 +- Corolla regular or nearly so; stamens not in pairs. 



Corolla transparent and veinless; leaves all radical Plantaginaceae, 103 



Corolla more or less veiny. 



Stamens 5 or 4, as many as the corolla lobes. 



Pollen in waxy masses; fruit a jiair of follicles Asclepiadacese, 73 



Pollen in powdery grains. 



Ovaries 2; fruit a pair of follicles Apocynaceae, 73 



Ovary 4-lobed, forming 4 seed-like nutlets Borraginacsae, 83 



Ovary single and entire 



Style 3-cleft; capsule 3-celled; corolla convolute Polemoniaceae, 75 



Styles or stigmas 2 or 1. 



Seeds 4 at most, large; peduncles axillary Convolvulaceas, 86 



Seeds few or many; embryo small, in albumen. 

 Leaves opposite or whorled, entire; or 



Leaves alternate, 3-foliolate, leaflets entire Gentianaceas, 74 



Leaves various, mainly alternate. 

 Styles 2, or 1 and 2-cleft; capsule 1-2-celled. . . . Hydrophyllaceas, SO 



Style 1; capsule or berry 2-celled Solaiiaceae, 88 



See also PiomanzofEa in Hydrophyllaceas, SO 



And Limosella in Scrophulariaceae, 89 



-i — J- Corolla irregular; stamens with anthers 4 in pairs, or 2 ; style 1. 



Ovary and capsule 2-celled Scrophulariaceae, 89 



Ovary 4-partcd ; fruit 4 seed-like nutlets Labiatae, 97 



Ovary undivided; fruit splittizig into 2 or 4 nutlets Verbenaceae, 102 



Apetalous Forms in Polypetalous and Gamopetalous Orders. 



Carpels 1 or 2, rarely 3, distinct and free; stamens on the calyx Rosacese, 49 



Capsule 2-celled, 2-seeded, flattened Cruciferae, 22 



Shrub with alternate simple leaves; flowers 4-merous Rhaiiinav,ese, 35 



Trees with opposite compound or lobed leaves. 



Fruit 1-seeded, winged (samara) Oleaceae, 73 



Fruit a pair of winged carpels (samaras) Sapindaceae, 37 



Herbs; ovary 1 -celled; style and stigma 1; leaves opposite Primulaceae, 72 



