584 ARBORETUM ET FRUTICETUM BRITANNICUM. 
10-velled and 10-valved as in R. arbéreum, with 2 septicidal dehiscence at 
the apex. Placentas simple, angular. Seeds compressed, scobiform, 
winged. (Don's Mill.) 
Leaves simple, alternate, exstipulate, deciduous, or evergreen; quite 
entire, terminated by a sphacelate apex, or yellow gland. Flowers terminal, 
corymbose, showy. — Shrubs, usually evergreen ; natives of Europe, Asia, 
and North America. 
In the Azalea division of this genus the species are almost entirely decidu- 
ous, with quite entire alternate leaves, terminated by a withered tip, or yellow 
gland; and terminal, corymbose, showy flowers. All the species thrive best 
in sandy peat, kept rather moist; and they are propagated chiefly by layer: 
and seeds. 
§ i. Pénticum D. Don. 
Sect, Char. Limb of calyx short, 5-lobed. Corolla campanulate. Stamens 10 
Ovarium 5-celled. Leaves coriaceous, evergreen. (Don’s Mill., iii. p. 843.) 
wz 1. R. po’nticum LZ. The Pontic Rhododendron, or Rose Bay. 
Identification. Lin. Sp., 562.; Don’s Mill., 3. p. 843. 
Engravings. Pall. Fi. Ross., 1. p. 43. t..29.; Bot. Mag., t. 650.; and our (fig. 1100. 
Spec. Char., §c. Leaves oblong-lanceolate, glabrous on 
both surfaces, attenuated towards the thick petioles, 
with a streak on the upper surface, of a wide lanceolate 
form. Racemes short, corymbose. Leaves sometimes 
becoming ferruginous beneath. Corolla purple or 
purplish pink, large; with ovate, acute, or lanceolate , 
segments. Calyx minute, 5-toothed, somewhat carti- 
laginous. (Don’s Mill.) An evergreen shrub; Pontus 
(now Armenia), in Asia Minor. Height 10 ft. to 
12 ft. Introduced in 1763. Flowers purple; May U, 
and June. Capsules brown ; ripe in September. 1100. R. pénticum 
Varieties. 
« R. p. 2 obtusum Wats. Dend. Brit. t. 162., Don’s Mill., has the leaves 
subcordate, coriaceous, obtuse, and the calyx very 
short, and unequally and undulately crenated. It 
grows from 3 ft. to 4 ft. high, and has purple flow- 
ers, Wild in Armenia, 
a R. p. 3 myrtifolium Lodd. Bot. Cab. t. 908. (and our 
Jig. 1101.), Don’s Mill., has the leaves small, and 
the flowers purple. It is a native of Gibraltar. 
a R. p. 4 Smithii Swt. Brit. Fl.-Gard. n. s. t. 50., 
Don’s Mill., has the leaves lanceolate, and clothed 
with white tomentum beneath; corymbs many- 
flowered; ovarium  to- 
mentose, and 10-celled. 
The flowers are of a rosy purple, ap- 
proaching to crimson, elegantly spotted 
with black. A hybrid, raised by Mr. Smith, 
at Coombe Wood, from the seed of R. 
pénticum, impregnated by the pollen of 
. arboreum. 
nm R. p.5 Lowii Gard. Mag. vol. xi. p. 190.— 
Corolla white ; the upper segments marked 
by a few dull scarlet spots. This is a 
most striking variety, originated by M. 
Jacob Makoy. 
za R. p. 6 azaledides; R. azaledides Desf. ; 
R. p. 8 subdeciduum Andr. Bot. Rep. t. 1102. R. p.azalewider. 
1101. R. p. myrtifelium, 
