155 
not appear to be closely related to any of the species composing 
this section, such as D. heterophyllum, Benth., D. acanthoi ‘ 
Edgw., from the Himalayas, and D. Ruprechtii, Reg., from Tibet. 
XXIV.—MISCELLANEOUS NOTES. 
Gift of Orchids by Sir George Holford.—Kew is indebted to 
Lt.-Col. Sir George Holford for many gifts of plants. In 1913 he 
presented over 200 orchids, chiefly Cattleyas, Cymbidiums, and 
Cypripediums, which enriched the collection by adding a large 
number of the best hybrids of these popular genera. The collec- 
tion was seriously depleted last year by salt poisoning (see Kew 
Bulletin, 1922, p. 7), and Sir George has generously assisted 
towards its restoration by presenting over 600 plants, including 
a large number of Miltonias, Cymbidiums, Cattleyas, Laelias, 
Laelio-Cattleyas, Brasso-Cattleyas and Dendrobiums, many of 
them large specimens. The value of this noble gift is very great 
and visitors to Kew have already been able to appreciate 
Sir George’s generosity as many of the plants are now in flower 
and making a beautiful display in the Orchid Houses. 
Pelargonium citriodorum.—Two very different plants have 
borne the name P. citriodorum. One was described by Cavanilles 
in 1791 under the name Geranium citriodorum,* and was trans- 
ferred to the genus Pelargonium by Martius in 1814.f It is 
presumably a hybrid, and is evidently related to P. acerifolium, 
L’Hérit.,t which was regarded by Harvey§ as a variety of 
P. angulosum, Ait., but is now treated by Knuth|| as an inde- 
penent species. 
e second Pelargonium citriodorum appeared as a bare name 
in C. A. Breiter’s Hortus Breiterianus, p. 331 (1817), and was not 
described until 1828.4 It is almost certainly a hybrid, and is 
apparently related to P. crispum, L’Hérit. and P. limoneum, 
Sweet, having the narrow lower petals of the former and the 
general colouration of the latter. It differs from both in the 
one-flowered peduncles. P. limoneum is supposed to be a hybrid, 
of which P. crispwm may be one of the parents. As the name 
P. citriodorwm is preoccupied, Breiter’s citriodorum may be known 
in the future as P. citrosum, Voigt, a manuscript synonym quoted 
by Breiter. The synonymy of the two supposed hybrids is as 
follows :— 
itri 143 
P. citriodorum, Mart., Pl. Hort. Acad. Erlang. Enum. p. 
(1814); Dietr. Lexik. Gartn. Nachtr. vi. p. 50 (1820), excl. syn. 
nonnull.— Geranium citriodorum, Cav. Ic. i. p. 6, t. 8 (1791). 
* Cav. Ic. i. p. 6, t. 8 (1791). 
Tt Mart. Pl. fs Acad. Erlang. Enum. p. 143 (1814). 
t L’Hérit. Geraniologia, t. 21 (1787-88). 
§ Harv. and Sond. FI. Cap. i. p. 303 (1860). 
| Engl. Pflanzenreich, Geraniac. p. 461 (1912). 
{ Schrank in Syll. Pl. Nov., Ratisbon, p. 67 (1828). 
