37G LXXVIIl. ERICACEAE. Rhododendron. 



Flowers fragrant, in terminal umbels, on hairy pedicels, not appearing until 

 the leaves are fully grown. Calvx minute and ciliate. Corolla white, tube an 

 inch in length, clothed with glandular hairs, and very clammy, limb unequal. 

 Stamens and style declined, the latter longest. May, June, -f 

 0. glaucuvi. Ph. (Azalea glauca. Lam.) Lis. glabrous, glaucous beneath. 



3. R. NiTiDUM. Torr. (Azalea nitida. Linn.) Shining Swamp Pink. 

 Lis. oblanceolate, coriaceous, smooth both sides, shining above, margins 



revolute ; Jls. accompanied with leaves, viscid ; tube much longer than the seg- 

 ments; sta. exserted. — In mountain swamps, N. Y. Storrs ! to Va. Shrub 3 — 6f 

 high, with nearly smooth branches. Leaves dark green above, 1 — 2' in length, 

 \ as wide, roundish and submucronate above, tapering at ths base in to very short 

 petioles, midvein hispid beneath. PMowers large, pale pink, fragrant. Tube 

 an inch or more long, glandular-hairy. Pedicels ^ long. Calyx segments ob- 

 solete. Style 2' long. Jn. Jl. 



4. R. CALENDULACEUM. Torr. (Azalea calendulacea. M.z.) Flame Azalea. 



Branchlets subvillose; Ivs,. oblong, attenuated to the base, mucronate, pu- 

 bescent both sides, ciliate on the margin ; corymbs nearly leafless ; cal. teeth 

 oblong; tube of tlie cor. hirsute, not viscid, shorter than the lobes. — A splendid 

 flowering shrub, in mountains and woods, Penn. to Ohio, Sullivantl and Ga. 

 Stems 3 — 6f high. The leaves at flowering time are about 3' by U' or smaller. 

 Flowers large and numerous, the corolla 2h' in length, limb expanding nearly 

 2', usually yellow and bright crimson, showing at distance like flame. May. — 

 Cultivation has produced numerous varieties, of every shade from golden-yel- 

 low to dark crimson, single and double, f 



5. R. ARBOREscENs. Torr. (Azalea arborescens. Ph.) Tree Azalea. 



Branches smooth; Ivs. obovate, obtuse, both sides glabrous, glaucous be- 

 neath, margin ciliate, veins nearly glabrous; corymbs leafy; cal. lobes ohXong, 

 acute ; cor. tube not viscid, longer than the lobes ; 'sta. and sty. exsert. — Rivulets 

 near the Blue Mts., Penn., Pursh. Shrubs 10 — 20f high. "Flowers large, rose 

 color, scales of the flower-buds large, yellowish-brown, with a fringed, white 

 border. May — Jl. 



6. R. HispiDUM. Torr. (A. hispida. Ph.) Hispid Azalea. 



Branches hispid ; /r.<;. lanceolate, acuminate at each end, hispid above, 

 glabrous beneath, glaucous both sides, ciliate, midvein beneath hispid; corymbs 

 leafy; pedicels glandular-pilose ; cal. l<:eth oblong, obtuse ; cor. very viscid, "tube 

 scarcely longer than the lobes ; sta. and sty. exsert. — Shrub of a bluish appear- 

 ance, very upright, 10 — 15f high, mountains and lake shores, N. Y. and Penn. 

 Pursh: Flowers white, bordered with red, tube reddish-white. Stamens often 

 10. Jl. Aug. 



7. R. FLAVUM. Don. (Azalea pontica. Linn.) Yellow Azaka. — Lis. oblong- 

 obovate ; rac. corymbose, with deciduous bracts ; cor. viscid-pilose without, not 

 leafy ; sta. exsert, declinate. — Native of the Caucasian Mts. A splendid shrub, 

 with golden-yellow flowers, varying to orange, copper-color or ochroleucous. f 



^ 2. Corolla ca7)ipanulate, tube short, smooth, lobes rounded-obtuse, sprcad- 

 ijig. Leaves coriaceous, evergreen. 



8. R. MAXIMUM. American Rose Bay. 



Lxs. obovate-oblong, smooth, coriaceous, discolored beneath, subrevolute 

 on the margin ; corymbs terminal ; cor. somewhat campanulate, unequal ; pet. 

 roundish. — A splendid flowering shrub, not uncommon in N. England, but most 

 abundant in the Middle States. The stems are crooked, 6 — 15f or more in 

 height. The young leaves are downy, becoming very smooth when full grown 

 and 4 — 7' long, entire, thick and leathery, permanent, remaining on the stem 2 

 or 3 years. Corymbs 15 — 20-flowered, in the midst of the evergreen leaves. 

 At first each cluster appears in the form of a large compound bud enveloped in 

 numerous bracts. These bracts are near an inch long, abruptly acuminate. 

 Corolla pink or rose-colored, sometimes dotted with )^ellow, IJ — 2' diam. The 

 wood is hard and fine grained. July, Aug. 



/?. album. Ph. (R. Punshii. Don.) Cor. white, segments oblong-obtuse. 



