ERICACE^. 219 



4. R. viscosum Torr. : branchlets hispid ; leaves oblong-obovate, acute, 

 smooth and green on both sides, ciliate on the margin, the midrib bristly ; 

 flowers glutinous, hairy, appearing with the leaves ; tube as long again as 

 the segments ; stamens scarcely longer than the corolla. Azalea viscosa 

 Linn, and A. glauca Pursh. ' 



Woods. Can. to Geor. June. T^ . — Stem 6 — 8 feet high, mucli branched. 

 Leaves 1 — 2 inches long, sometimes glaucous beneath. Flowers white, iu ter- 

 minal clusters, sweet scented. Corolla viscid and pubescent. 



White Wild Honeysuckle. 



5. R. cale)idulaceum Torr. : branchlets somewhat villous ; leaves oblong, 

 pubescent on both sides, at length hirsute ; flowers large, in rather naked 

 corymbs, not viscid ; teeth of the calyx oblong ; tube of the corolla liairy, 

 shorter than the segn-ients. Azalea catendulacea Mich. A. nvAifiura var. 

 coccinea Ait. 



Penn. to Car. May. On Clear Creek, Ohio, Dr. J. M. Bigelow. T^ . — Stem 

 2 — 6 feet high. Flowers yellow or flame-color. One of the handsomest shrubs 

 in the U. S. Yelloio-flowered Rose-bay. 



6. R. arborescens Torr. : branchlets smooth ; leaves obovate, somewhat 

 obtuse, smooth on both sides, glaucous beneath, ciliate on the margin, midrib 

 almost smooth ; flowers in leafy corymbs, not viscid ; tube longer than the 

 segments; calyx leafy, with the segments oblong, acute; filaments ex- 

 serted. Azalea arborescens Pursh. 



filue Mountains, Penn. May— July. T^. Pursh.— Stem 10—20 feet higiM. 

 Flowers large, reddish ; scales of the flower-buds large, yellowish-brown, sur- 

 rounded with a fringed vvhite border. Pursh. Arborescent Azalea. 



7. R. nitidum Torr. : branches somewhat smooth ; leaves oblanceolate, 

 submucronate, coriaceous, smooth on both sides, shining above • midrib 

 bristly beneath, margin revolute-ciliate ; flowers viscid, in leafy corymbs ; 

 tube a little longer than the segments ; calyx very short. • Azalea nitida 

 PivrsK. 



Mountain swamps. N. Y. to Virg. June, July. T^- — Leaves dark green and 

 shining, smaller than in any other species. Flowers white, with a reddish tinge. 

 Pursh. Shining Rhododendron. 



8. R. hispidum Torr. : branches straight, very hispid ; leaves loncr-Ian- 

 ceolate, hispid above, smooth beneath, glaucous on both sides, ciliate on 

 the margin, the midrib bristly ; flowers very viscid, appearing with the 

 leaves ; tube scarcely longer than the segments ; teeth of the calyx oblong, 

 rounded ; filaments exserted. Azalea hispida Pursh. 



Margins of lakes, on high mountains. N. Y. and Penn. Pursh. July, Aug. 

 Vl* — Stem 10 — 15 feet high. Flowers white, with a red border. Stamens ohen 

 10. This shrub is said by Pursh to have a bluish appearance, by which it may 

 be distinguished from all others at a great distance ; but Dr. Torrey thinks it is 

 scarcely distinct from R. viscosum. Hispid Rhododendron. 



12. AZALEA. Z/mTi.— -Azalea. 

 (Supposed to be derived from the Greek o^aXsoj, dry, from its habitat.) 

 Calyx 5 -parted. Corolla short, campanulate, 5 -cleft. Sta- 

 mens 5, equal, shorter than the corolla ; anthers opening longi- 



