Enica. LXXVUl. ERICACEA. 377 
9. R. Lapponicum. Wahl. (Azalea Lapponica. Linn.) Lapland Rhodo- 
dendron.—Dwarf; lvs. elliptical, roughened with excavated punctures; fis. 
in terminal, leafy clusters, campanulate, limb spreading, 5-lobed; sta. 5, ex- 
serted—aAn erect shrub 8—10’ high, native of the White Mts.! Branches nume- 
rous, with a rough bark. Leaves about 5” by 23”, acute, with an obtuse angle, 
revolute, ferruginous beneath, all fasciculated at the summits of the branches. 
Flowers 7—9’ 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. arsoreum. Smith.— Ss. arborescent; Jvs. lanceolate, glabrous, with 
shining white spots beneath; fs. densely corymbose; caps. pubescent, 8—10- 
celled—A most beautiful tree or shrub, from the Himmaleh Mts. Flowers 
purple, red, white, cinnamon-color, &c. T 
11. R. Ponricum.—Lwvs. oblong-lanceolate, attenuated to each end, smooth 
and scarcely paler beneath; corymés short, terminal; cor. campanulate-rotate ; 
cal. lobes subacute, very short.—From Asia Minor. Flowers large, often 2’ 
diam., purple—but in cultivation very variable. t 
12. R. Inpicum. Sweet. (Azalea Indica. Linn.)—Branchlets, petioles, veins 
and sepals strigose, but not glandular; /vs. cuneate-lanceolate, ciliate, acumi- 
nate at each end; fis. terminal, 1—3 together, on short pedicels—From Java. 
Flowers scarlet, purple, crimson, flame-color, &c.,in cultivation very brilliant. ¢ 
14. LEIOPHYLLUM. Pers. 
Gr. devos, smooth, pvddoy, leaf. 
Calyx 5-parted, 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. Lws. alter- 
nate, entire, oval, coriaceous. Corymbs terminal. F'ls. white. 
L. puxirouium. Ell. 
St. erect; lvs. 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. 
156. LEDUM. 
Calyx minute, 4-toothed ; corolla 5-peta:ed, spreading ; stamens 
5—10, exserted; anthers opening by 2 terminal pores; capsule 5- 
celled, 5-valved, opening at the base.—Shrubs. Lvs. alternate, ever- 
green, entire, ferruginous-tomentose beneath, coriaceous. Els. in terminal 
corymbs, white. 
L. paLusTrE (and L. latifolium. Ait.) Labrador Tea. 
Is. elliptic-oblong or oblong-linear ; sfa. 5—10, 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 younger twigs are also covered with 
down. Leaves 1—2’ long, nearly } as wide. Corymbs terminal, of about a 
dozen flowers. Petals 5, white. Pedicels nearly as long as the leaves. Sta- 
mens 5—10, as long as the petals. Style somewhat declined. July. © 
B. angustifolium. Lvs, narrower, almost linear; sfa. mostly 10. 
16. ERICA. 
Gr. epic, to break; in allusion to the brittleness of the branches and stems. 
Calyx 4-cleft; cor. tubular, globose, ovoid, urceolate, campanulate 
or hypocrateriform, limb short, 4-lobed ; stam. 8 ; style filiform ; caps. 
A, rarely 8-celled, 4-yalved, loculicidal; seeds 2—00 in each cell, 
