216 HEATH FAMILY. 



* Flowers very small, with globular and scurfy-pubescent corolla. Rusty pu- 

 bescent or scurfy shrubs, 4 - 10 high. 



A. ferruginea. Low sandy grounds S. with thick and rigid mostly ever- 

 green rusty obovate leaves, the margins revolute. 



A. ligustrina. Low grounds E. & S. ; with thin and green obovate-oblong 

 leaves, and jmnicled clusters of small flowers. 



12. OXYDENDRUM, SORREL-TREE, SOUR- WOOD. (Both the 

 Greek-made and English names refer to the sour-tasted leaves.) One species. 

 O. arbbreum. Rich woods, Pcnn. to Ohio and S. ; tree 15 -40 high, 



smooth, with oblong-lanceolate pointed serrulate leaves (resembling those of The 

 Peach), on slender petioles, and white flowers in long one-sided racemes clus- 

 tered in a loose panicle at the end of the branches of the season, in early 

 summer. 



13. KALMIA, AMERICAN or MOUNTAIN LAUREL. (Named for 

 Peter l\l m, pupil of Linmeus, who travelled in this country before the 

 middle of the last century.) Ornamental shrubs, scarcely found W. : foliage 

 thought to poison cattle. Fl. spring and early summer. 



K. latifolia, LARGE MOUNTAIN-L., also CALICO-BDSH, SPOON-WOOD, & c ., 

 in Middle Status. Common N. in damp grounds and along the mountains S.' 

 where it forms very dense thickets, 4-10 or even 20 "high, with mostly 

 alternate lance-ovate leaves bright green l>oth sides ; the large and showy 

 clusters of rose-color or white or crimson-spotted flowers terminal and clammy 

 in early summer. 



K. angustifdlia, NARROW-LEAVED or SHEEP L., LAMKILL. Low or 

 dry grounds ; 2-;i high, with narrow-oblong short-petioled leaves opposite or 

 in threes and pale beneath, and corymbs uf .smaller crimson-purple flowers lat- 

 eral (in late spring), their pedicels 'recurved in fruit. 



K. glauca, I'AI,K L. Cold bogs N. ; l-2 high, with 2-ed-ed branches, 

 opposite sessile oblong or linear leaves white beneath and with revolute margins, 

 the corymbs of lilac-purple flowers terminal, in spring. 



14. RHODODENDRON, ROSE-BAY. (The name in Greek means 

 ttos&tree.) Very ornamental shrubs or small trees. Calyx in our species 

 small or minute. 



* Leaves thick and evergreen, smooth : branches stiff ami e-vrt .- flowers in early 

 summer from very large terminal buds: coiolta brond'i/ foil-shaped. 



R. maximum, GREAT R. or WILD LATUEI,. Mountain sides, abundant 

 through the. Alleghanies, and N sparingly to Maine and Canada- (>-20 

 high, with lance-Oblong leaves (4'-K>' Ion-) narrowM, !,<!,, \v, elaminv i.edi- 



Is, and pale ruse or nearly white corolla (I' broad) greenish in the throat, on 

 the upper side more or less spotted with yellow or reddish : tl. midsummer. 



R. Catawbiense, CATAWHA R. High Alleghanies from Virginia S., and 

 planted; 3-6 high, with oval or ohlom; leaves rounded at both e*ds and 

 pale beneath (:{'-.V long), usually rusty pedicels, and large purple corolla: 



early summer. This, hybridized with other less | K ,nlv species especially 

 with the next, and with the tender R. arboreum of the 'Himalayas (cult, in 

 conservatories) gives rise to most of the various Rhododendrons of ornamental 

 grounds. 



R. P6nticum, from Pontus, &c., hardv when planted N. only as a low 

 Shrub, has ohovate-laneeolate leaves tapering to the base, and a very open bell- 

 Bhaped purple corolla, in late spring. 



* * Leaves evergreen, but thinnish ; branrlrs slmdcr and spreading or droopir,,, : 



flowers in enr/i/ sii 



R. punctatum, DOTTED R. Aloni; the mountains E. from N. Carolina 

 8., and sparingly planted; 4 -6 high, with ohlong or lance-oblong leaves 

 "cute at both ends, 2' -4' long, and sprinkled, like the branchlets and outride 

 ot the rather small short funnel-shaped rose-colored corolla, with rusty dots 01 

 atoms. 



