40 ERICACE^. Rhododendron. 



R. Kamtschaticuni, Pall. A span high : leaves thin and chartaceo-membranaceous, 

 sessile, obovate, or tlie upper oval, very obtuse, nervose-veined and reticulated, bristly 

 ciliate, sliining : sepals large and foliaeeous, deciduous : corolla rose-purple, deeply 5-cleft, 

 nearly an inch long : capsule thin. — Fl. Ross. i. 48, t. 33 ; Hook. Fl. ii. 43. Rhodothamnus 

 Kamtsdiatkus, Lindl. in Paxt. Fl. Gard. i. t. 22. — Alaska and Aleutian Islands to North 

 Japan, &c. 



§ 2. AzALEASTRUJi, Planction, Maxim. Inflorescence lateral ; the flowers 

 from the same bud as the leafy shoot or from separate 1-3-flowered lateral buds 

 below : scales caducous : leaves deciduous : corolla rotate or approaching cam- 

 panulate : stamens 5 to 1 0. 



R. albiflorum, Hook. Slirub 2 or 3 feet high, with slender branches, pubescent vpith 

 slender strigose or silky and some short glandular hairs when young, nearly glabrous 

 in age : leaves membranaceous, oblong, pale green : flowers from separate small buds of 

 tlie axils of the previous year, nodding on short pedicels : sepals membranaceo-foliaceous, 

 oval or oblong, lialf the length of the wliite 5-cleft corolla, as long as the ovoid capsule : 

 stamens 10, included : filaments bearded at the base: stigma peltate-5-lobed. — Fl. ii. 4.3, 

 & Bot. Mag. t. 13.j.^ Woods of tlie northern Rocky Mountains and Oregon to British 

 Columbia. Corolla less than an inch long. 



§ 3. Azifi-EA, Planchon, Ma.xim. Inflorescence terminal ; with the umbellate 

 flowers from a separate strobilaceous bud, terminating the growth of the previous 

 year, surrounded at the base by lateral and smaller leaf-buds, developing in 

 spririg or early summer ; the thin-scaly bud-scales and bracts caducous or early 

 deciduous : leaves deciduous, glandular-mucronate : calyx small, sometimes minute : 

 corolla chiefly funiielform, glandular-viscid outside : stamens and style more or 

 less exserted and declined (5 to 10). — Azalea, L. chiefly, DC. &c. (with RJiodora, 

 Duhamel). 



* Strobilaceous flower-buds of numerous much imbricated ^^cales: corolla with conspicuous funnel- 

 form tube, bliijlitiy irregular limb, and acute oblong lobes: stamens (chiefly 5) and style long- 

 exserted. Tkue Azaleas. 



■1— Pacific States species: flowers more or less later than the leaves. 

 ■•R. OCCidentale, Gray. Shrub 2 to 6 feet high : branches not bristly: leaves obovate- 

 oblong, nearly glabrous at maturitj', but ciliate, thickish, bright green and shining above 

 (1 to 3 inches long) : lobes of the 5-parted calyx oblong or oval: corolla wliite or barely 

 with a rosy tinge and a pale yellow band on the upper lobe, often 2^ inclies long : capsule 

 oblong, three-fourths inch long. — Bot. Calif, i. 458. R. calendulaceum, Hook. & Arn. Beech. 

 362. Aziilea occiderttalis, Torr. & Gray, Pacif. R. Rep. iv. 116. — California, western foot- 

 hills of the Sierra Nevada through the length of the State, and in the coast ranges, along 

 streams. Fragrance of blossoms sweet, but slightly unpleasant. 



■i— H^ Atlantic States -species (comnionlv called Swamp I-It)NEYSuCKLES), all from 3 to 10 feet 

 high and the leaves fron) obovate to oblong-oblanceolate. — Species oi Rhudodtndrim. Torr. Fl. 

 N'&M. States (1824), 424. 



-H- Flowers appearing later than the glabrous leaves, delicioiisly fragrant. 

 . R. arborescens, Torr. No strigose or chaffy bristles : leaves (fragrant in drying) 

 merely ciliolate, slightly coriaceous wlien mature, bright green and sliining above, glau- 

 cescent beneath : corolla rose-color, fully 2 inches long ; the tube and the conspicuous 

 narrow-oblong calyx-lobes sparsely glandular-bristly. — Fl. N. & M. States, 425. Azulm 

 arborescens, Pursli, Fl. i. 1.52 ; Gray, Man. ed. 1, 268. A. fnujrans, Raf. Ann. Nat. 12. — 

 Alleghany Mountains, Pennsylvania to North Carolina, l^oliage exhales the odor of An- 

 lliujii.nllium in drying. 



R. Viscosum, Torr. Branchlets and midrib of the loaves beneath more or less chaffv- 

 bristly : leaves more ciliate, an inch or two long, dull or hardly shining above, pale be- 

 neath : calyx very small : corolla wliite, or witli a rosy tinge, sometimes varying to reddisli, 

 the outside very glandular-viscid, — Fl. N. & M. States, 1. c, & Fl. N. Y. i. 4:39, t. Qti. 

 Azalea viscosa, L. (Catesb. Car. i. t. 57); Miclix. Fl. i. 150; Emerson, Mass. Rep.' ed. 2, 



