536 ARBORETUM ET FRUTICETUM BRITANNICUM. 
variety has fragrant flowers, and, according to Sir W. J. Hooker, is 
‘amply worthy of a place in every garden and shrubbery.” 
Readily known from &. pénticum and R., catawbiénse by the rusty under 
surface of the leaves, and the comparatively pale green of the entire plant. It 
neither grows nor flowers so freely in British gardens as the other species. 
aw ¢ 3, R.(M.) PurPU‘REUM G. Don. The purple-flowered Rhododendron, 
or American Rose Bay. 
Identification. Don’s Mill, 3. p. 843. 
Synonymes. R. maximum y purpireum Pursh Fl. Amer. Sept. 1. p. 297.; R. pénticum macro- 
ph¥llum Lodd. Cat. 
Engraving. Our fig. 2096. in p. 1108. 
Spec. Char., §c. Leaves large, oblong-elliptic, flattish, acute, bluntish at the 
base, green, and glabrous on both surfaces. Segments of corolla oblong 
and obtuse. Calycine segments obtuse. This shrub approaches near to 
R. pénticum ; but it differs in its foliaceous calyx, and otherwise. It 
grows to an immense size; its stem being often found 18 in. and more in 
diameter ; and its foliage triple the size of that of any other species. (Don’s 
Mill.) A large evergreen shrub, or low tree. Virginia and Carolina, on 
the highest mountains, near lakes. Height 25 ft.; in England seldom seen 
otherwise than as a shrub. Introduced ?. Flowers large, purple; May 
and June. Rare in British gardens. 
#4, R. Pu’rsuiz G. Don. Pursh’s Rhododendron, or American Rose Bay. 
Identification. Don’s Mill., 3. p. 843. P 
Synonyme. R.maximum £ Album Pursh Fl. Amer. Sept. 1. p. 297. 
Engraving. Our fig. 1105. from a specimen in Dr. Lindley’s herbarium. 
Spec. Char., §c. Arborescent. 
Leaves cuneate-lanceolate, 
flat, glabrous, tapering gra- 
dually to the base, paler 
beneath. Calycine —seg- 
ments oval, obtuse. Seg- 
ment@ of corolla roundish 
oblong. Flowers white, and 
smaller than those of R. 
maximum. (Don’s Mul.) An 
evergreen shrub. New Jersey 
and Delaware, in shady cedar 
swamps. Height 6 ft. to 8 ft. 
Introduced in 1811, but not 
common in collections. Flow- 
ers white ; June to August. The latest of all the rhododendrons in British 
gardens. Horticultural Society’s Garden. 
1105. #. Parshic. 
« 5. R. carawsie’NsE Michr. The 
Catawba Rhododendron. 
Identification. Michx. Fl. Bor. Amer., 1. p. 258.3 
Don's Mill., 3. p. 843. 
Engravings. Bot. Mag., t. 1671.; Bot. Cab., t. 
1176. ; and our jig. 1106. 
Spec. Char., §c. Leaves short-oval, 
rounded, and obtuse at both ends, 
glabrous, of a different colour be- 
neath. Calycine segments elongated 
oblong. Flowers purple, disposed 
in umbellate corymbs. (Don’s Aull.) 
A large evergreen shrub. Virginia 
and Carolina, particularly near the 
head waters of the Catawha River. 423 
Height 4 ft. Introd. in 1809 and Libee Alesina ibe: 
