154 
** Corolla somewhat irregular ; stamens (with anthers) 5. 
Stamens free from corolla; anther-cells opening by hole or chink 
at top. ...--- 22-2 22 e eee eee eee eee ee eee Rhododendron, in ERICACE, 
Stamens inserted on corolla; pod many-seeded; filaments or some 
of them woolly. ......-.-.-...-.-.-.2----- Verbascum, in SCROPHULARINEA, 
* * 
Corolla regular. 
+ Slamens as many as lobes of corolla. 
Ovaries 2, separate; their 
253 
306 
Styles and stigmas also wholly separate....Dichondra, in CONVOLVULACE, 289 
Stigmas and sometimes styles united into one. 
Filaments distinct; poten in ordinary grains.......------ APOCYNACEA, 261 
Filaments monadelphous; pollen in masses...._....----- ASCLEPIADE, 263 
Ovary 1, but deeply 4-lobed around style (or 2-lobed in Heliotropium). 
Leaves alternate ....... 222-222-2222 2-222 eee eee ee eee eee BORAGINE®, 282 
Leaves opposite....-....---. 2-222-222-2522 eee eee eee ee eee eee ee LABIATAE, 330 
Ovary 1, pod 2-lobed or 2-horned at summit......-......2-.-2---- LOGANIACE, 270 
Ovary 1, not deeply lobed, 
1-celled, 1-ovuied, becoming an achene.........--.-.-..----- PLANTAGINEA, 344 
1-celled, with ovules parietal or on 2 parietal placentie. 
Leaves entire......---..-.----- 2-2-2 2 eee eee ee eee eee GENTIANEX, 273 
Leaves toothed, lobed, or pinnately compound. ..... HYDROPHYLLACEX, 278 
2 to 10-celled. 
Leafless parasitic twining plants........ Cuscuta, in CONVOLVULACE, 294 
Leaves opposite, their bases or petioles connected by 
stipules or a stipular line.........22...---.----.----- LOGANIACE, 270 
Leaves when opposite without stipules, 
Stamens free from corolla or nearly so........---------- ERICACEA, 253 
Stamens inserted on corolla-tube, 
4; pod 2-celled, circumscissile.........-...----- PLANTAGINE®, 344 
4; ovary 2 to 4-celled; ovules solitary.......--.. VERBENACES, 326 
5 or rarely more. 
Fruit of 2 or 4 seed-like nutlets............--. BORAGINE, 282 
Fruit a few-seeded pod, 
Calyx 5-cleft; style 3-lobed or cleft....POLEMONIACE, 276 
Sepals 5; styles Lor 2, entire or 2-cleft.CONVOLVULACE, 288 
Fruit a many-seeded pod or berry. 
Styles 2.........2..-. Hydrolea, in HyDROPHYLLACE.E, 282 
Style single .........-....2--...-.-------- SOLANACE.L, 296 
++ Stamens fewer than lobes of corolla. 
Stamens 4, didynamous. 
Ovary 2-celled; cells several-seeded. .........--...---.------ ACANTHACE®, 319 
Ovary 2 to 4-celled; cells l-seeded.......-.....-.---..-+.---- VERBENACE®, 326 
Stamens only 2 with anthers; ovary 4-lubed...........--.------ Some LABIAT.L, 330 
Stamens 2, rarely 3; ovary 2-celled. 
Low herbs; corolla scarious, withering on pod....-......--- PLANTAGINE, 344 
Herbs; corolla rotate or somewhat funnelform, and slightly 
irregular ............-----.------------ Veronica, in SCROPHULARINE, 312 
Shrubs or trees; corolla perfectly regular. ........-----.---.---- OLEACE, 258 
POLYPETALOUS FORMS IN GAMOPETALOUS ORDERS: 
The following orders contain forms which have their petals separate: 
