DIVISION IT. GAMOPETAL.E, 



Floral envelopes consisting usually of both calyx and corolla, 

 the petals usually more or less united into a gamopetalous corolla. 



SYNOPTICAL KEY TO THE GAMOPETALOUS ORDERS. 



a. Ovary inferior, 

 * Filaments and anthers distinct, leaves opposite* 



47. Viburnaceae. Shrubs with simple or pinnate leaves and no stipules. 

 Stamens 4 or 5: styles 1 or none. Fruit a 1-5-celled, 1-few-seeded 

 berry or capsule. Seeds albuminous. 



48. nbiacea*. Herbs or shrubs with opposite, stipulate or verticellate 

 leaves. Flowers regular, 4 -5-merous. Style 1, entire or cleft, Fruit 

 dry, indehipcent, 2-4-celled, 2-4-seeded. Seeds albuminous. 



49. Valerianaceae. Herbs with simple or pinnate opposite leaves, with- 

 out stipules. Flowers irregular. Stamens 1-4; fewer than the lobes 

 of the corolla. Ovary 3-celled, becoming a 1-celled, 1-seeded achene- 

 like fruit. Seeds without albumen. 



50. Dipsacaceae. Herbs with opposite or verticellate leaves, without 

 stipules and capitate involucrate inflorescence Stamens 2-4; as many 

 as or fewer than the lobes of the corolla. Ovary simple, 1 -celled", 

 with a single suspended ovule. Seeds albuminous. 



* * Stamens 5 ; anthers or filaments united into a tube around the 

 2-cleft or entire style. Leaves various, without stipules. 



51. Composite. Herbs, shrubs or trees with opposite or alternate 

 leaves without stipules and i-numerous flowers in a capitate cluster, 

 surrounded by an involucre. Calyx reduced to a pappus or obsolete. 

 Filaments mostly distinct. Fruit an achene. Seeds without albu- 

 men. 



52. Lobeliaceae. Herbs with alternate, simple leaves and irregular 

 scattered or racemose flowers. Filaments united : anthers sometimes 

 distinct. Fruit a 1-2-celled, many-seeded capsule; more or less infe- 

 rior. Seeds with fleshy albumen 



* * * Stamens distinct. Leaves alternate. 



53. Cainpauulaceae. Herbs with simple leaves, without stipules. Flow- 

 ers regular, 5-merous. - tyle one, 2-5 lobed. Fruit a 2-5-celled, many- 

 seeded capsule with placentse in the axis. Seed with fleshy albumen. 



b. Ovary superior or nearly so, compound. 



* Corolla regular. Stamens not didynamous. 



+- Fruit 5-many-celled. 



54. Vacciniaceae. Shrubs with simple leaves without stipules. Flow- 

 ers regular, 4-5-merous. Anthers opening by terminal pores. Style 

 one. Fruit a 4-10-celled many-seeded berry. 



55. Ericaceae. Shrubs with simple, mostly alternate leaves without 

 stipules. Flowers 4-5-merous. Styles one. Anther-cells opening by 



