Ixii INTRODUCTION. 



Polypetals with an inferior ovary. 



f Stamens 10 or fewer, of the same number or twice the petals ... 47 



46-^ Stamens 12 Lytheum Gen. (p. 287.) 



[^Stamens indefinite, usually numerous 50 



f Petals 5. Stamens 10 Saxifeage Gen. (p. 304.) 



| Petals 5. Stamens 5 48 



47 <{ Petals 3. Aquatic plants with diclinous flowers. 



Hydeociiaeis Fam. (p. 801.) 



^Petals 2 or 4. Stamens 2, 4, or 8 49 



f Herbs. Fruit separating into two dry one-seeded carpels. 



Umbellate Fam. (p. 318.) 



48 <| Shrubs. Fruit a berry, with several seeds . . . Ribes Gen. (p. 300.) 



Evergreen climber. Fruit a berry, with 2 to 5 seeds. 



I Ivy Gen. (p. 373.) 



,J Fruit a berry. Shrubs or herbs Cornel Gen. (p. 376.) 



\ Fruit dry, capsular. Herbs ...... GEnotheea Fam. (p. 273.) 



I" Calyx of 2 sepals Purslane Fam. (p. 135.) 



50 < Calyx of 4, 5, or twice that number of teeth or divisions. 



[ Rose Fam. (p. 234.) 



Monopetals with an inferior ovary. 



{Leaves alternate or radical 52 

 Leaves opposite or whorled 54 



""Shrubs. Stamens 8 or 10. Fruit a berry. Yaccinium Gen. (p. 518.) 

 Climber. Flowers dioecious. Stamens 5, combined into 3. Fruit 



a berry Beyony Gen. (p. 290.) 



Herb with ternately divided leaves. Stamens 8 or 10. Fruit aberry. 



Moscatel Gen. (p. 378.) 



^Herbs. Stamens 5. Fruit a capsule 53 



^Stamens inserted within the base of the corolla. 



Campanula Fam. (p. 505.) 

 Stamens inserted in the tube of the corolla. Flowers small, white. 



Samole Gen. (p. 547.) 



Leaves in whorls of four or more Stellate Tribe (p. 385.) 



Leaves opposite 55 



_- J Stamens 1, 2, or 3 Yaleeian Fam. (p. 396.) 



Di) 1 Stamens 4 or 5 . . 56 



^Flowers numerous, in heads, with a common involucre. Fruit dry, 



one-seeded. Stem herbaceous Teasel Fam. (p. 403.) 



Flowers distinct or few together, without a common involucre. Fruit 

 often succulent. Stem usually shrubby or climbing. 



Honeysuckle Fam. (p. 378.) 



51 



52^ 



53 



54 



56 



{: 



Monopetals with a free ovary. 



Ltj f Stamens twice as many as the lobes of the corolla 58 



\ Stamens equal in number to the lobes of the corolla or fewer ... 61 



p, R f Flowers regular. Stamens distinct 60 



X Flowers very irregular. Stamens united 59 



f Leaves much divided Fumitoey Fam. (p. 35.) 



59 -s Leaves with 3 leaflets Clovee Gen. (p. 196.) 



[ Leaves entire Milkwoet Gen. (p. 98.) 



T Ovary single, of several cells. Leaves not peltate. Heath Fam. (p. 517.) 



60 < Ovaries several, distinct. Radical leaves, peltate, fleshy. 



L Cotyledon Gen. (p. 292.) 



