ORDER 73. ERICACEAE. 20;) 



14. OXYDENDRUM, DC. SORREL-TREE. Sep. bractless, valvatc in 

 die early bud. Cor. urceolate, ovoid, 5-toothed. Anth. 10, linear, erect, 

 awnless, cells opening lengthwise. Capsule oblong, truncate, 5-celled, 5- 

 valved. Seeds oo. J> Lvs. petiolate, oblong-lanceolate, acuminate, ser- 

 rulate. Flowers white, in terminal panicles of slender, spicate racemes. 

 O. arboreum DC. Ohio, Perm., and S. along the Alleghany Mts. Tree 40-50ft. Jn., Jl. 



15. LOISELEURIA, Desv. ALPINE AZALEA. Calyx 5-parted, lobes 

 equal. Cor. subcampanulate, 5-parted, regular. Sta. 5, equal, erect, shorter 

 than the corolla, anth. dehiscing laterally. Style straight, included. Caps. 

 2- or 3-celled, 2- or 3-valved, oo-seeded. > Delicate, procumbent, tufted, 

 with opposite, petiolate, entire leaves. Pedicels terminal, solitary, 1-flow- 

 ered. Corolla rose-color. 



L. proc umbens Desv.- Summit of the White Mts., N. H. A tiny shrub. S 6'. Lva. 

 elliptical, 8", margins rcvolute. Flowers nearly sessile. June, July. 



16. AZALEA, L. SWAMP PINK. Cal. small, 5-parted. Cor. funnel- 

 form, somewhat irregular, with 5 spreading lobes. Sta. 5. Fil. and style 

 long, exserted, declined, anth. opening by pores. Caps. 5-celled, 5-valved, 



00 - seeded. J> Erect. Lvs. alternate, deciduous, oblong or obovate, en- 

 tire. Flowers in umbelled clusters, terminal, large and showy. Fig. 114. 



Calyx lobes all (or rarely one excepted) very short or minute Nos. 1, 2 



Calyx lobes all oblong and of conspicuous length. a Native Nos. 3, 4 



a Exotic Nos. 5, 6 



1 A. vlscosa L. Branchlets hispid ; leaves obovate-oblong, the edges, midvein, and 



petiole bristly ; fls. appearing after the Ivs.. very viscid, the tube much longer than the 

 gegments ; stamens exserted ; style much longer. Swamps. 4 lOf. May July. 



/3. niti tin. Lvs. smooth, green, shining, oblanceolate. Dry woods, N. 1 2f. 



y. iiixpirta. Lvs. very hispid above, smooth and glaucous beneath. Mts., Pa. 



2 A. iiudiflora L. Pinxter-bloom. Young branchlets and Ivs. beneath pubescent; 



clusters naked, appearing with or before the young Ivs. ; corolla slightly viscid, tube 

 downy, scarcely longer than the segm. Woods: more common S. 3 7f. Apr. + . 

 Varies with the flowers pink, deep purple, white-variegated, white with a bnff centre, 

 and buff all over; the latter two fragrant. Also, with 10 20 stamens. 



3 A. calendulacea MX. Flaming Pinxter. Young branchlets pubescent ; Ivs. at- 



tenuated to the base, corymbs nearly or quite leafless ; tube of the cor. hirsute, not 

 viscid, shorter thau the ample lobes. Upland woods, O., Pa., and S. 3 lOf. May, Jn. 

 The splendid flowers vary to yellow-scarlet, flame-color, brick-red, saffron-yellow, &c. 



4 A. arfooresceiis Ph. Branches smooth ; Ivs. obovate, glabrous, glaucous beneath, 



margins ciliate ; corymbs leafy with full-grown leaves ; corolla tube not viscid, longer 

 than the lobes. Mts., Penn., and S. 10 20f. May July. 



5 A. INDICA. Strigous, but not glandular; Ivs. wedge-lanceolate, acuminate, ciliate; 



fls. terminal, 1 3 together. Japan. Fls. scarlet, crimson, white. &c. Splendid. 

 C A. PONTICA. Lvs. oblong, acute, margin ciliate; fls. viscid, corymbed, after the 

 leaves ; tube equalling the limb, yellow, very fragrant. Asia Minor. 



17. RHODODENDRON, L. ROSE BAY. Calyx small, deeply 5-part- 

 ed, persistent. Cor. campanulate, often slightly unequal, 5-lobed. Stam. 

 10 (rarely fewer), mostly declinate, anthers opening by 2 terminal pores. 

 Caps. 5-celled, 5-valved, many-seeded. > 5 With alternate, entire leaves 

 Blowers in dense, terminal umbels from large, scaly buds. Figs. 99, 311 



