250 THE FLORA. 



Lobes of the calyx all (rarely 1 excepted) very short or mi ante 1, 2 



Lobes of the calyx all oblong, and of conspicuous length . . . .3-5 



1 A. visco'sa. Clammy Swamp Pink. Flowers very viscid, appearing with the 



full-grown leaves, the tube much longer than the segments. Shrub 4-7f 

 White or roseate. 



2 A. nudiflo'ra. Pinxter Bloom. Clusters naked, appearing with or before the 



young leaves. Corolla tube downy, scarcely longer than the segments. 

 Branches often whorled. Colors pink, purple, white, buif, &c. t 



I A calendula'cea. Flaming Pinxter. Young branchlets downy, corymbs nearly 

 or quite leafless. Tube of the corolla hairy, shorter than the ample lobes. 

 Common. Penn. S. & W. Flowers very many, flame-color, bright red, saffron- 

 yellow, &c. t 



4 A. arbores'cens. Tree Azalea. Branches smooth. Leaves glaucous beneath. 

 Corymbs leafy with full-grown leaves. Corolla tube longer than the lobes, not 

 viscid. Height 10-20f. Mountains. S. 



6 A. Pon'tica. Asiatic A. Flowers viscid, with full-grown leaves. Tube wicu- 

 mouthud, as long as segments. All colors, t 



7. RHODODENDRON. Rose Bay. 



Calyx 5-parted. Corolla broad, campanulate, regular or slightly irreg 

 ular, 5-lobed. Stamens 10, mostly- declined,- anthers opening by pores. 

 Capsule 5 -celled, 5-valved. Shrubs with alternate, entire, evergreen 

 leaves. Flowers umbeled, splendid. 



Calyx lobes large, leaf-like. Exotic 7 



$ Calyx lobes small, scale-like. . . .a 



a Leaves small, obtuse at each end. Mountains.. . .1, 2 



a Leaves large, acute, .rusty or silvery beneath.. ..5, 6 



a Leaves large, acute, glabrous beneath.. . .3, 4 



1 R. Lappon'icum. Lapland R. Shrub 5-10' high. Lvs. scaly, elliptic. N. 



2 R. Catawbien'se. Uatawba R. Shrub 8-5f. high. Leaves smooth, oval. S. 



3 R.max'imum. Great R. Leaves oblanceolate, acute, paler beneath. Flowers 



in large umbels, white, with yellow dots. Rocky woods. 



4 R. Pon'ticnm. Asiatic R. Leaves lanceolate, acuminate, not paler beneath. 



Flowers large, purple, variegated. 



6 R puncta'tum. Dotted-lf. R. Lvs. with rusty, resinous dots beneath. Mts. S. 

 <i H arbo'reum. Tree R. Leaves with silvery spots beneath. Asia, t 



7 R. In'dicum. Indian R. Leaves rough, wedge-lance. Fls. few together. \ 



8. PYR'OLA. False Wintergreen. 



Calyx 5-parted. Petals 5, equal. Stamens 10, anthers large, turned 

 ontwards, opening by 2 pores at the obtuse top. Style thick, long ; stig- 



