376 LXXVIII. ERICACEAE. Rhododendron. 



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

 the leaves are fully grown. Calyx 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. giaucuvi. Ph. (Azalea glauca. Lam.) I/t;5. glabrous, glaucous beneath. 



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

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



revolute ; Jis. accompanied with leaves, viscid ; iitbe much longer than the seg- 

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

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

 I as wide, roundish and submucronate above, tapering at the base into very short 

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

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

 solete. Style 2' long. Jn. Jl. 



4. R. CALENDULACEUM. Torr. (Azalea calendulacea. Mr.) Flame Azalea. 



BrancMeis subvillose ; lis. oblong, attenuated to the base, mucronate, pu- 

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

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

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

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

 Flowers large and numerous, the corolla 2^' 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.) Tire Azalea. 



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

 neath, margin ciliate, veins nearly glabrous ; coryvibs leafy ; cal. lobes oblong, 

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

 near the Blue Mis., 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. HLSpiDUM. Torr. (A. hispida. Ph.) Hispid Azalea. 



Branches hispid; Ivs. lanceolate, acuminate at each end, hispid above, 

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

 leafy ; pedicels glandular-pilose ; cal. teeth 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.) Yellmo Azaka. — Z/i;s. 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. -j- 



§ 2. Corolla campanulate, tube short, smooth, lobes rounded-obtuse, spread- 

 ing. Leaves coriaceous, evergreen. 



8. R. MAXIMUM. American Rose Bay. 



Lvs. obovate-oblong, smooth, coriaceous, discolored beneath, subrevoluta 

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

 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 yellow, IJ — 2' diam. The 

 wood is hard and line grained. July, Aug. 

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



