Rhododendron. LXXVIII. ERICACEAE. 375 



cumhent shrub, with opposite, petiolate, evergreen, entire tvs. Pedicels 

 terminal, solitary, l-Jlowered. Cor. rose color. 



A. PROCUMBENS. (Loiseleuria, Dcsv. Rhododendron. 1st edit.^ 

 An exceedingly delicate shrub, native on the alpine summits oi the White 

 Mts., N. H. ! Stems 3 — 6' long, very branching and leafy. Leaves elliptical, 

 thick, shining, not more than 3" by 1", margin strongly revolute. Flowers 

 glabrous, on very short, purple pedicels, in the midst of the leaves. Jn. Jl. 



12. RHODORA. 



Gr, ^oSov, a rose ; the shrub bears only flowers at flowering time. 



Calyx 5-toothed, persistent ; cor. adnate to the calyx, deeply divided 

 into 3 segments, upper one much the broadest, 2 — 3-lobed at the 

 apex, in aestivation enfolding the 2 lower, entire segments ; sta. 10, 

 declinate ; fil. unequal ; anth. opening by 2 pores ; caps. 5-celled, 5- 

 valved ; cells many-seeded ; dissepiments formed by the introflexed 

 margins of the valves. — A shrub ivith deciduous, alternate leaves., and 

 pale purple Jioivers. 



R. Canadensis. (Rhododendron Rhodora. Don.) 



A handsome, flowering shrub, in bogs, mountain or plain, Can. to Penn., 

 frequent. Stems 2 — 3f high, clothed with a smooth brown bark, each dividing 

 at top into several erect, flowering branches. Each branch, while yet naked of 

 foliage, bears a terminal cluster of 3 — 5 sessile flowers. Corolla V long, about 

 equaling the deflected stamens and style. Leaves obovate-oblong, downy- 

 canescent beneath. Apr. May. 



13. RHODODENDRON. 



Gr. ^o6ov, a rose, SevSpov, a tree. 



Calyx deeply 5-parted, persistent ; cor. infundibuliform or cam- 

 panulate, regular or irregular, 5-lobed ; sta. 5 — 10, mostly declinate 

 and exserted; anth. opening by 2 terminal pores; capsule 5-celled, 

 5-valved, opening at the summit ; dissepiments introflexed from the 

 margin of the valves. — Shrubs icith alternate, entire, evergreen or decidu- 

 ous leaves. Pis', mostly in terminal, corymbose clusters. Cor. variausly 

 shaded from blue through purple to white. 



^ 1. Corolla infundibuliform, tube long, cylindric, more or less viscid ; 

 limb unequal, spreading ; stamens 5 or 6. Lvs. deciduous. Azalea. 



1.. R. nudifi-orum. Torr. (Azalea nudiflora. Linn.) Swamp Pink. 



L/va. oblong-lanceolate and oblanceolate ; Jls. rather naked, slightly viscid ; 

 tube of the corolla longer than the lobes ; sta. much exserted. — A beautiful and 

 fragrant flowering .shrub, -1 — &( high, rather frequent in the forests and thickets 

 of the Northern States as well as the Southern. Stems crooked, much branched. 

 Leaves 2 — 3' by 1 J', margins ciliate, upper surface with minute, scattered hairs, 

 lower paler and pubescent, with the niidvein hispid. Flowers appearing before 

 the leaves are lully grown, in rather naked umbels. Pedicels (5 — 8" long. 

 Calyx minute, with rounded, ciliate segments. Corolla tube 8 — 10" in length, 

 hairy, and, with the spreading, unequal limb variously shaded from pale pink 

 to purple. Stamens purple, dccliuaie, twice as long as the corolla. Style nearly 

 3 times as long. It varies in the number of stamens, color of corolla, &<:. 

 Apr. May. f 



2. R. viscosu.M. Torr. (Azalea viscosa. Linn.) Clnvimy Siramp Pink. 



L.?*s. obovate and oblong-lanceolate ; ^5. accompanied with leaves, very 

 viscid ; tv})e of the cnrotla twice as long as the lobes ; ata. a little ex.serted. — Less 

 frequent than the last, in rocky wo<k|s, Can. to Ga., W. to Kv- Shrub 1 — 6f 

 high, much branched above, the branches hispid. Leaves 1 — 'i' long and about 

 half as wide, smoothish, hispid, ciliate on tne petiole, midvein and margin. 



