Order 73.— HEATHWORTS, 247 



Analysis of the Genera. 



% Shrubs or trees, or shrublets 2 



§ Herbs evergreen, with green herbage and leaves m 



§ Herbs leafless, without verdure. Bracts scale-like n 



2 Calyx adherent, crowning the berry in fruit a 



2 Calyx free from the ovary, or inferior 3 



8 Petals united into a gamopetalous corolla. . . .4 



8 Petals entirely or very nearly separate and distinct ...5 



4 Flowers 4-parted. Stamens 8 b 



4 Flowers 5-parted. Stamens 5 or 10 



5 Pods 2 or 3-celled, cells only 1-seeded. Southern. . . .k 



5 Pods 3-celled, cells many-seeded g 



5 Pods 5 or 7-celled, cells many-seeded h 



6 Corolla urn-shaped (oval or globular), lobes small. . . .o 



6 Corolla not urn-shaped, open or spreading e 



a Erect shrubs with 5-parted flowers and 10-seeded berries. 



Huckleberries. Gaylussa'cia. 

 a Erect shrubs with 5-parted flowers and oo-seeded berries. 



Blueberries. Vaccin'ium. 

 a Trailing shrublets. Corolla 4-cleft, reflexed. Fr. red. Cranberry. Oxycog'cus. 1 

 a Trailing shrublets. Corolla 4-cleft, spreading. Fruit white. 



Boxberry. Chiog'enes. 2 

 b Leaves linear-acerose, whorled or crowded. Cultivated. Heath. Er''ica. 



b Leaves ov^l-lanceolate. Shrub, 4f. high, ^^^^^-^^l Mountain Heath. Menzie'.ia. 

 c Pod dry, opening bet. the cells. Lvs. lin. N. J 



c Pod dry, opening into the cells d 



c Drupe fleshy, 5-seeded, Shrubs trailing. Bearherry. Arctostaph'tlos. 

 c Berry fleshy, many-seeded. Little shrublets. Clieckerberry. Gaulthe'rta. 3 

 d Shrublet moss-like, on high Mts. Leaves linear. Moss Andromede. Cassi'ope. 

 d Shrubs with ample leaves. Pod-valves entire. Andromede. Andkoit'eda. 



d Tree with ample leaves and slender racemes. Sorrel-tree. Oxyden^drum. 



e Corolla saucer-form, holding the anthers in 10 pits. Laurel. Kal'mia. 4 



e Corolla salver-form, very fragrant. Trailing, May-flower. Epigje'a. 5 



e Corolla funnel or bell-form, with spreading lobes f 



f Stamens 5, included. Plant and leaves very small. Mts. N. H. Leioseleu'ria. 

 f Stamens 5 (rarely more), long-exserted. Corolla funnel-form. Aza'lea. 6 



f Stamens 10 (rarely fewer), exserted. Corolla bell-form. Bay. Rhododen'dron. 7 

 g Leaves alternate, deciduous, serrate. Flowers racemed. Cle'thra- 



g Leaves mostly opposite, evergreen, entire. Flowers umbeled. 



Sand Myrtle. Leiophyl lum. 

 h Flowers 5-parted. Corolla regular. Labrador Tea. Le'dum. 



h Flowers 5-parted. Corolla irregular. Khodo'ra. 



h Flowers 7-parted, regular. Stamens 14. 8. Befa'ria. 



