218 ERICACEAE. 



tinged with red, very fragrant. Tt it is said, but perhaps incorrectly, to be inju- 

 rious to cattle, when eaten by them. It is sold by the Shakers under the name 

 of Gravel Plant. Ground Laurel. Trailing Arbutus. 



10. RHODORA. Linn. Rhodora. 

 (From the Greek p?<W, a rose.) 



Calyx 5-toothed, persistent. Corolla adnate to the calyx, 

 ringent, the upper lip 2 3-parted, the lower one 2-lobed. 

 Stamens 10, declined. Filaments unequal. Capsule 5-celled, 

 5-valved, opening at the top. 



JR.Canadensis Linn. Rhododendron Rhodora Don. Torr. 



Mountain bogs. Can. and N. S. May. T^ . Stem 2 feet high, with smooth 

 erect branches. Leaves alternate, oval, very entire, nearly smooth above, 

 pubescent and glaucous beneath. Flowers purple, in terminal clusters or umbels, 

 appearing before the leaves. Rhodora. False Honeysuckle. 



11. RHODODENDRON. Linn. Rose-bay. 



(From the Greek ?-)<W, n. rose, and SsvSpov, a tree ; in allusion to the color of 

 the flowers.) 



Calyx 5-parted. Corolla somewhat funnel-form, 5-cleft. 

 Stamens 5 10, decimate. Anthers opening by 2 terminal 

 pores. Capsule mostly 5-celled, 5-valved. 

 * Stamens 510. 



1. JR. Lappo-nicum Wahl. : procumbent and divaricately branched ; leaves 

 elliptic, obtuse, rigid, covered with minute scales on both sides ; flowers few, 

 terminal, umbellate ; corolla campanulate. Azalea Lapponica Linn. 



Highest summits of Mounts Marcy and Mclntyre, N. Y. Torr. White Moun- 

 tains, N. H. Arct. Amer. and the "Rocky Mountains. July. Tj . Stem with 

 numerous straggling branches, a few inches high. Leaves 5 7 lines long, ever- 

 green. Flowers deep purple, in terminal clusters or umbels. 



Low Alpine Rose-bay. 



'2. JR. maximum Linn. : arborescent ; leaves elliptic-oblong, evergreen, 

 acuminate, thick, smooth, paler beneath; corymbs somewhat racemose; 

 segments of the calyx ovate-oblong, obtuse ; corolla campanulate. 



Swamps and bogs. Mass, to Car. June, July. T? . Stem 10 15 feet high. 

 Leaves lar*ge, coriaceous. Flowers rose-color, in a large compact cone-like ra- 

 ceme, covered when young with large acuminate ferruginous bracts. Several 

 varieties occur in various parts of the U. S. Medicinal. Big. Med. Hot. iii. 101. 



American Rose-bay. 

 ** Stamens 5. * 



3. JR. nudiflorum Torr. : oblong, acute, ciliate, pubescent above and on the 

 veins and midrib beneath ; flowers in rather naked corymbs, slightly viscid ; 

 tube of the corolla a little longer than the lohes; stamens exserted. Azalea 

 nudiflora Linn. A peridymenoides Mich. 



Woods. Can. to Geor. April, 3Iay. fy. Stem 2 6 feet high, much 

 branched above. Leaves crowded at the ends of the branches. Flowers red- 

 dish, in terminal clusters, appearing a little before the leaves. Of this species 

 there are a number of varieties. Among others mentioned by Pursh. is one 

 wliich has from 1020 stamens. Upright Wild Honeysuckle. Pinxter Blow. 



