CHAP. LXIX. 



£RlCA*CEiE. RHODODENDRON. 



1141 



Stamens much exserted. (Don's Mill., n\. p. 847.) A deciduous shrub, a 

 native of North America, from Canada to Georgia, on the sides of hills ; 

 where it grows from 3 ft. to 4 ft. high, flowering from April to June. In- 

 troduced in 1734. It is the parent of numerous varieties, and, in con- 

 junction with the preceding species, of numerous hybrids. 



Varieties and Hybrids. 



& R. n. 1 coccineum D. Don; Azalea n. coccinea Sims, Bot. Mag., t. 180. ; 

 has the flowers scarlet, and the leaves lanceolate. It is a native of 

 Georgia, near Savannah. 



Sfe R. 7i. 2 rutilans D. Don; A. n. rutilans Ait. Hart. Kcw., p. 319. ; A. 

 ^>ericlymenoides rutilans Pursh Fl. Amer. Sept., i. p. 152. — The flow- 

 ers are deep red. Calyxes minute. 



at R. n. 3 cdrneum D. Don ; A. n. carnea Ait., 1. c, Ker Bot. Reg., t. 

 120. ; A. p. carnea Pursh, 1. c. — The corollas are pale red, having the 

 tube red at the base, and the calyx foliaceous. 



sit R. n. 4 album D. Don ; A. n. alba Ait., 1. c. ; A. p. alba Pursh ; has the 

 flowers white, and the calyx middle-sized. 



it R. n. 5 papiMondceum D. Don, A. p. papilionacea Pursh, has reddish 

 flowers, with the lower segment white, and the calyx foliaceous. 



Sfe R. n. 6 partitum D. Don, A. p. partita Pursh. — The flowers are pale 

 red, 5-parted, even to the base. 



Sk R. n. 7 polydndrum D. Don ; A. p. polyandra Pursh, 1. c. ; has flowers 

 of a rose colour, short. Stamens 10 — 20. It is found near Phila- 

 delphia. 



* R. n. 8 Goveniknum D. Don in 



Brit. Fl.-Gard., hi. t. 263., and 

 our fig. 944., has the 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. Flowers delicate 

 light purple, disposed in terminal 

 racemose corymbs. It is a hy- 

 brid raised from the seed of A. 

 nudiflora impregnated by the 

 pollen of a hybrid raised be- 

 tween R. ponticum and R. catawbiense. This variety Mr. G. Don 

 considers as proving " clearly that Rhododendron and Azalea are 

 not generically distinct ;" (Don's Mill., iii. p. 387.) which we believe 

 to be the case, according to the canons for distinguishing genera, at 

 present in use among botanists : but, as before observed, we have 

 kept the genus Azalea distinct, for the sake of expediency, inde- 

 pendently altogether of our own private opinion, that genera ought 

 to be established on a totality of characters and properties j not 

 taking merely the form and organisation of the parts of fructifi- 

 cation. 

 st R. n. 9 rubrum Lodd. Bot. Cab., t. 51., has the flowers red. 



* R. n. 10 eximium D. Don was raised, in 1829, from seeds of/?, nudifldruin 



coccineum majus, to which pollen of iithododendron arboreum had 

 been applied. It resembles its female parent, having very little affinity 

 with R. arboreum, except in its evergreen leaves and decandrous 

 flowers. 



The varieties and hybrids assigned to A. nudiflora in Loddiges's Catalogue 

 for 1836 are the following : — 



4f 4 



