40 ERICACE^. Rhododendron. 



R. iLaratschaticum, Pall. A span high : leaves thin and cliartaceo-menibranaeeous, 

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

 ciliate, shining : sepals large and foliaceous, deciduous : corolla rose-purple, deejily 5-clel't, 

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

 KamlscJidtlcus, Lindl. in Paxt. Fl. Gaixl. i. t. 22. — Alaska and Aleutian Islands to Nortli 

 Japan, &c. 



§ 2. AzALEASTRUM, Plaiiclion, 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. Shrub 2 or 3 feet high, with slender branches, pubescent with 

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

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

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

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

 stamens 10, included: filaments bearded at the base: stigma peltate-5 lobed. — Fl. ii. 43, 

 t. 133, & Bot. Mag. t. 3670. — Woods of the northern Eocky Mountains and Oregon to 

 British Columbia. Corolla less than an inch loug. 



§ 3. AzXlea, Planchon, Maxim. 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 

 spring or early summer ; the thin-scaly bud-scales and bracts caducous or earl}^ 

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

 corolla chiefly funnelform, glandular-viscid outside: stamens (5 to 10) and style 

 more or less exserted and declmed. — Azalea, L. chiefly, DC. &c. (with Rhodora, 

 Duhamel). 



* Strobilaceous fldwcr-buils of miineroiis much imbricated scales: corolla witli conspicuous funiicl- 

 forin tube, slightly irregular liinb, and acute olilong lobes: stamens (chicliy 5) and style long- 

 exserted. Tkue Azaleas. 



-i~ Pacitic States species: flowers more or less later than the leaves. 

 R. OCCidentale, Gray. Sln-ub 2 to G feet high: branches not bristly : leaves obovate- 

 oblong, nearly glabrous at maturity, but ciliate, thickisli, briglit green and shining above 

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

 with a rosy tinge and a pale yellow band on the upper h)be, often 2^ inches long : capsule 

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

 362. Azalea occ/drnlalts, Torv. & Gray, Pacif. R. Rep. iv. IIG. — 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. 



^— ^_ Atlantic States species (commonly called Sw.vmp Honeysitklks), all from -3 to 10 feet 

 high and the leaves from obovate to oblong-oblanceolate. — Species o( Jiliod(xhndrun, Torr. Fl. 

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



+-(• Fliiwcrs appearing later than the glabrous leaves, deliciously fragrant. 

 R. arborescens, Torr. Few strigose or chaffy bristles- leaves (fragrant in drying) 

 merely ciliolate, slightly coriaceous when mature, bright green and shiuiug above, glau- 

 cescent beneath : corolla white or tinged with rose, fully 2 inches long ; the tube and the 

 conspicuous narrow-oblong calyx-lobes sparsely glandular-bristly : stamens and style red. — 

 FL N. & M. States, 425. Azalea arborescens, Pursh, Fl. i. 152; Gray, Man. ed. 1, 268. 

 A. frafp-ans,'Rni. Ann. Nat. 12. — Alleghany Mountains, Peuusylvania to North Carolina. 

 Foliage exhales the odor of Anthoxanthum in drying. 

 R. viscosum, Torr. Brancblets and midrib of tlie leaves beneath more or less chaffy- 

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

 neath : calyx very small : corolla white, or vvitli a rosy tinge, sometimes varying to reddish, 

 the outside very glandidar-viscid. — Fl. N. & M. States, I.e., & Fl. N. Y. i. 439, t. 6G. 

 Azalea viscosa, L. (Catesb. Car. i. t. 57); Michx. Fl. i. 150; Emerson, Mass. Rep. ed. 2, 



