(Kfje l^ljotiobenliron ^otietp ^otesi. 
Loudon, in " Arboretum et Fruticetum,” Vol. II., p. 1138 (published 
1838, gives ;— 
CAUCASICUM, Pallas, with a small wood-cut. The flowers are described 
as " purple or white.” 
And the following varieties:— 
STRAMiNEUM, HooK. “ Flowers straw-coloured.” 
PULCHERRiMUM, Lindl. (arboreum X caucasicum). ” A hybrid raised by 
Waterer, of Knaphill, in 1832.” Bot. Reg., 1820. 
Nobleanum, Hort., ‘‘ a hybrid very much like the preceding one in all 
respects except that its flowers are of a brilliant rose colour.” Bot. Reg., 1820. 
The plate of pulcherricum above referred to (1820, in the Botanical Register), 
is like what would presumably be called Nobleanum. In the corner of the plate 
is one flower of a darker colour, said to be Nobleanum. 
At the Ordinary Meeting of the Royal Horticultural Society, on February 
5th, 1838, ” Mr. George Glenny exhibited a Rhododendron said to have been 
raised by himself from seed. It did not appear different from a variety raised 
some years since by Mr. Waterer, of Knaphill, and called in the gardens Rh. 
pulcherrimum.” 
Pritzel refers to the following plates connected with caucasicum;— 
CAUCASICUM, Pallas, Pallas Flor., Ross, 31 Guimpel Fr. Holzgew 124. 
Bot. Mag., 1145. 
CAUCASICUM variety stramineum. Bot. Mag., 3422. 
CAUCASICUM variety hybridum album. Bot. Mag., 3811. 
CAUCASico-ARBOREUM, Hort., Maund Bot., 4. 157. This shows a pink-white 
Rhodo. with spotted throat and is stated to have been raised by Mr. Smith, of 
Norbiton. It is synonymous with venustum. See Sweet, series 2.t.285. 
CHRYSANTHUM, Pallas, Pallas Flor. Ross. 30. 
WooDV. Med. Vol. III., p. 149 (the plate is much the same as that in Pallas). 
Berl. Yahrb. 1811. 2. 
Guimpel Fr. Holzgew. 123. 
Hayne. 10.27. 
Nees Dusseld. 216. 
Guimpel et Schl. 42. 
In addition to the above there is a plate of caucasico-venustum 
” Rosalba ” in Flore des serres, Vol. X., plate 1038. This shows a pink-white 
flowered rhododendron, but no account is given of its origin. 
In “ Gartenflora,” Vol. XVIIL, 1869, p. 113, reference is made to Rhodo. 
caucaseum-splendens and Rhodo. caucasicum albo-roseum, but no mention 
is made of their origin, and there is no plate. 
In ‘‘ Gartenflora,” Vol. XVI., 1867, p. 322, a description is given of Rhodo. 
caucasicum, Pallas, variety flavidum, and a plate. No. 560, which shows a 
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