ERICACER. XLIII. Ruovopenproy. 
40 R. Fra‘vum; flowers leafy, clammy; leaves ovate, oblong, 
pilose, ciliated; corolla funnel-shaped ; stamens very long. 
Native of the Levant, at Pontus; Caucasus, Turkey, &c. Azalea 
Pontica, Lin. spec. 1669. Curt. bot. mag. t. 433. Azalea ar- 
borea, Lin. spec. ed. 1. p. 150.—Buxb. cent. 5. p. 36. t. 69. 
Flowers fine yellow. Leaves shining. There are a great num- 
ber of varieties of this species in the gardens, differing princi- 
ally in the colour of the flowers, and the hue of the leaves. 
he flowers are of all shades, from yellow to copper or orange- 
colour. They are sometimes white, (see Sims, bot. mag. 2383.), 
and are sometimes striped with yellow and red. 
Yellow-flowered Rhododendron. FI. May, June. 
Shrub 4 to 6 feet. 
41 R. nuprrrorvum (Torr. fl. un. st. 1. p. 140.) leaves lanceo- 
late-oblong, nearly smooth and green on both surfaces, ciliated 
on the margins, having the mid-rib bristly beneath, and woolly 
above; flowers rather naked, not clammy; tube of corolla 
longer than the divisions ; teeth of calyx short, rather rounded ; 
stamens much exserted. h. H. Native from Canada to 
Georgia, on the sides of hills. Azalea nudiflora, Lin. spec. 214. 
Azalea periclymenoides, Michx. fl, bor. amer. 1. p. 151. This 
beautiful shrub has a great many varieties, besides those men- 
tioned below, for which see Loud. hort. brit. p. 66. and supple- 
ment, among which is one with double flowers. Flowers scar- 
let, pink, white, striped, variegated, red, purple, &c., disposed 
in terminal clustered racemes, appearing before the leaves. The 
variety ņn proves clearly that Azalea and Rhododéndron are not 
generically distinct. 
Var. a, coccineum (Sims, bot. mag. 180.) flowers scarlet ; 
leaves lanceolate. h.H. Native of Georgia, near Savannah. 
Var. B, rùtilans (Pursh, fl. amer. sept. 1. p. 152.) flowers 
deep red ; calyxes minute. h.H. Ait. hort. kew. p. 319. 
Var. y, cárneum (Pursh, 1. c.) corollas pale red, having the tube 
red at the base; calyx foliaceous. h.H. Ait. l.c. Ker. bot. 
reg. 120. 
Var. ò álbum (Pursh, l. c.) flowers white; calyx middle- 
sized. h.H. AEG 
Var. £, papiliondceum (Pursh, 1. c.) flowers reddish, with the 
lower segment white ; calyx foliaceous. h.H. Ait. l. c. 
Var. ¢, partitum (Pursh, l. c.) flowers pale red, 5-parted even 
to the base. P. H. Ait. lc: 
Var. n, polyandrum (Pursh, 1. c.) flowers rose-coloured, 
short; stamens 10-20. h.H. Native near Philadelphia. 
Var. 0, Govenianum; branches tomentosely downy ; leaves 
evergreen or deciduous, oblong, acute, downy while young, but 
glabrous in the adult state, and recurved at the apex; tube of 
corolla a little shorter than the segments. h.H. A hybrid, 
raised from the seed of R. nudiflorum, impregnated by the pollen 
of a hybrid raised between R. Pénticum and R. Catawbiénse. 
Flowers delicate light purple, disposed in terminal racemose 
Clt. 1793. 
corymbs. R. Govenianum, Sweet, fl. gard. 3. t. 263. 
Var. t, rùbrum (Lodd. bot. cab. t. 51.) flowers Ted: ahi H 
Naked-flowered Rhododendron. Fl. April, June. Clt. 1734. 
Shrub 3 to 4 feet. 
42 R. viscosum (Torr. l. c.) leaves oblong-obovate, acute, 
smooth and green on both surfaces, ciliated on the margins, 
having the mid-rib bristly; flowers clammy, leafy, hairy ; tube of 
corolla as long as the segments; teeth of the calyx short, 
rounded ; stamens hardly longer than the corolla. k. H. Na- 
tive from Canada to Georgia, in swamps and shady woods. 
Azalea viscdsa, Lin. spec. 214.—Pluk. alm. 106. t. 161. f. 4. 
Catesb. car. 1. t.57. Flowers white, sweet-scented, in terminal 
clusters, downy. There are a great number of varieties of this 
species, (see Loud. hort. brit. p. 66.), varying in the colour of the 
flowers, and otherwise. The flowers are white and red, and 
variegated with these colours. There is a downy variety with 
red flowers figured in Lodd. bot. cab. t, 441. 
847 
Var. P, orndtum (Sweet, fl. gard. n. s. 137.). A hybrid raised 
from the seed of R. viscosum f rubéscens, fertilized by the pollen 
of R. Ponticum. 
Clammy-flowered Rhododendron. Fl. July, Aug. Clt. 1734. 
Shrub 2 to 4 feet. 
43 R. caLenputa‘ceum (Torr. 1. c.) leaves oblong, pubes- 
cent on both surfaces, at length hairy; flowers large, not 
clammy, rather naked; teeth of calyx oblong; tube of corolla 
hairy, shorter than the segments. h. H. Native from Penn- 
sylvania to Carolina. Azalea calendulacea, Michx. fl. bor. amer, 
1. p. 156. Lodd. bot. cab. 1394. A. nudifldra, var. coccinea, 
Ait. hort. kew. 319. Flowers yellow, red, orange-coloured, 
and copper-coloured. Sims, bot. mag. 172. Lodd. bot. cab. 
1394, or flame-coloured. Ker. bot. reg, 145. Said to be 
the handsomest shrub in North America. There are a great 
many varieties of it, varying in the colour of the flowers. See 
Loud. hort. brit. p. 66. 
Var. B, Mortèrü (Sweet, fl. gard. n. s. t. 10.) A hybrid be- 
tween R. calenduldceum and one of the red varieties of R. nudi- 
Jlorum. There are also two kinds of this; one with a fesh- 
coloured corolla, having the upper segment orange-coloured, 
edged with flesh-colour, called R. Mortérii carnea ; and another 
called Mortérii, var. pre'stans, with pale copper-coloured flowers, 
tinged with blush. 
Marygold Rhododendron, Fl. May, June. Clt. 1806. Shrub 
2 to 6 feet. 
44 R. arpore'scens (Torr. 1. c.) leaves obovate, rather ob- 
tuse, smooth on both surfaces, glaucous beneath, ciliated on the 
margins, having the mid-rib almost smooth ; flowers not clammy, 
leafy ; tube of corolla longer than the segments; calyx leafy, 
with the segments oblong and acute; filaments exserted. h. 
H. Native of Pennsylvania, on the sides of rivulets near the 
Blue Mountains. Azalea arboréscens, Pursh, fl. amer. sept. 1. 
p. 153. Flowers large, reddish; leaves of flower-buds large, 
yellowish brown, surrounded with a fringed white border. 
‘Arborescent Rhododendron. Fl. May, July. Clt. 
Tree 10 to 20 feet. 
45 R. nitipum (Torr. l. c.) branches smoothish; leaves ob- 
lanceolate, rather mucronate, coriaceous, smooth on both sur- 
faces, shining above, having the nerve bristly beneath, with revo- 
lute ciliated margins; flowers clammy, leafy; tube of corolla a 
little longer than the segments; calyx very short; filaments 
exserted. h.H. Native from New York to Virginia, in deep 
mossy swamps on the mountains. Azalea nítida, Pursh, fl. 
amer. sept. 1. p. 153. Ker. bot. reg. 414. Flowers white, 
tinged with red. Leaves dark green, shining, smaller than any 
other species of the present section. 
Shining-leaved Rhododendron. Fl. June, July. Cit. 1812. 
Shrub 2 to 4 feet. 3 Se 
46 R. wisprpum (Torr. I. c.) branches straight, very hispid ; 
leaves long-lanceolate, hispid above, and smooth beneath, glau- 
cous on both surfaces, ciliated on the margins, having the nerve 
bristly beneath ; flowers very clammy, leafy ; tube of corolla 
wide, scarcely longer than the segments ; teeth of calyx oblong, 
rounded ; filaments exserted. h. H. Native of New York 
and Pennsylvania, on the borders of lakes on the highest part of 
the Blue Mountains. Azalea hispida, Pursh, fl. amer. sept. 1. 
. 154, Wats. dendr. brit. 6, Azalea viscdsa, var. glatica, Ait. 
hort. kew. 1. p. 319.2? Flowers white, with a red border, and 
a tinge of red on the tube, which makes them appear to be of a 
rose-colour before expansion. Stamens sometimes 10. This 
species may be distinguished from the rest of the present section 
by its bluish appearance. 
"ital Rhododendron. Fl. July, Aug. Clt. 1734. Shrub 
5 feet. j 
ae R. BícoLor ; leaves oblong, clothed on both surfaces with 
fine hoary pubescence, not bristly on the nerve ; flowers small, 
1818. 
