EBICA. LXXVII1. ERIOACEA. 377 



9. R. LAFPQNICUM. Wahl. (Azalea Lapponica. Linn.) Lapland Rhod^^- 

 dendron. Dwarf; Ivs. elliptical, roughened with excavated punctures ; fls. 

 in terminal, leafy clusters, campanulate, limb spreading, 5-lobed ; st-a. 5, ex- 

 serted. An erecf shrub 8 10' high, native of the White Mts. ! Branches nume- 

 rous, with a rough bark. Leaves about 5" by 2", acute, with an obtuse angle, 

 revolute, ferruginous beneath, all fasciculated at the summits of the branches. 

 Flowers 79" diam. Peduncle bracted at base. Calyx pubescent. Corolla 

 deep purple, regular, lobes roundish, as broad as the leaves. Style very long, 

 ascending. June, July. 



10. R. ARBOREUM. Smith. St. arborescent; Ivs. lanceolate, glabrous, with 

 shining white spots beneath ; fls. densely corymbose ; caps, pubescent, 8 10- 

 celled. A most beautiful tree or shrub, from the Himmaleh Mts. Flowers 

 purple, red, white, cinnamon-color, &c. f 



11. R. PONTICUM. Lvs. oblong-lanceolate, attenuated to each end, smooth 

 and scarcely paler beneath ; corymbs short, terminal ; cor. campanulate-rotate ; 

 col. lobes subacute, very short. From 'Asia Minor. Flowers large, often 2' 

 diam., purple but in cultivation very variable, f 



12. R. INDICUM. Sweet. (Azalea Indica. Linn?) BrancMets, petioles, veins 

 and sepals strigose, but not glandular ; Ivs. cuneate-lanceolate, ciliate, acumi- 

 nate at each end ; fls. terminal, 1 3 together, on short pedicels. From Java. 

 Fk wers scarlet, purple, crimson, flame-color, &c., in cultivation very brilliant. -J 



14. LEIOPHYLLUM. Pers. 

 Gr. \sios, smooth, 0wAAov, leaf! 



Calyx 5-partecL equaling the length of the capsule ; pet. 5, ovate- 

 oblong; sta. 10, exserted; fil. subulate; cells of anthers dehiscing 

 by a lateral cleft ; ovary globose ; sty. filiform ; caps 5-celled, 5-valved, 

 many-seeded. Small, smooth shrubs, with erect branches. Lvs. alter' 

 nate, entire, oval, coriaceous. Corymbs terminal. Fls. white. 



L. BUXIPOLIUM. Ell. 



St. erect; Ivs. oval or obovate, subsessile ; caps, glabrous. Pine barrens, 

 N. J. to Car. Shrub 8 12' high, much branched. Leaves 4 5" by 2 or 3", 

 very smooth and shining, margin strongly revolute. Flowers numerous and 

 small. May, June. 



15. LEDUM. 



Calyx minute, 4-toothed ; corolla 5-petaied, spreading ; stamens 

 5 10, exserted; anthers opening by 2 terminal pores; capsule 5- 

 cclled, 5-valved, opening at the base. Shrubs. Lvs. alternate, ever- 

 green, entire, ferruginous-tomentose beneath, coriaceous. Fls. in terminal 

 corymbs, white. 



L. PALUSTRE (and L. latifolium. Ait.') Labrador Tea. 

 Lvs. elliptic-oblong or oblong-linear ; sta. 510, more or less exserted. 

 Mountain bogs, Penn. to Lab and Greenland, White Mts. ! Not uncommon. 

 A shrub 2 3f high, readily known by its leaves, which are smooth above, 

 clothed beneath with a dense, ferruginous down, and strongly revolute or repli- 

 cate at the margin. The petioles and the vounger twigs are also covered with 

 down. Leaves 12' long, nearly as wide. Corymbs terminal, of about a 

 dozen flowers. Petals 5, white. Pedicels nearly as long as the leaves. Sta- 

 mens 510, as long as the petals. Style somewhat declined. July. 

 /?. angustifolium. Lvs. narrower, almost linear; sta. mostly 10. 



16. ERlCA. 



Gr. spiKu, to break; in allusion to the brittleness of the branches and sterna. 



Calyx 4-cleft ; cor. tubular, globose, ovoid, urceolate, campanulate 

 or hypocrateriform,limb short, 4-lobed ; stam. 8 ; style filiform ; caps. 

 4, rarely 8-celled, 4-valved, loculicidal ; seeds 2 00 in each cell, 



