130 THE ORCHID REVIEW. [June, 1917- 
warm, and shady house, and a layer of moss round the base of the pots was 
found conducive to the necessary degree of humidity in the atmosphere, as 
thrip and red spider have to be guarded against, which soon work havoc 
among the foliage. The warmer temperature required is explained by the 
fact that M. Roezlii grows at a lower elevation than M. vexillaria. M. 
Roezlii is a native of the western Cordillera of New Granada, in the 
province of Antioquia, notably on the slopes of the hills near the river 
Atrato, a tributary of the Cauca, and in the hot valleys of the Dagua river, © 
where it grows abundantly on trees and rocks, mostly in shade, and some- 
times, according to Messrs. Veitch, associated with Oncidium Kramer- 
ianum. And Roezl remarks that, where it grows, rain falls on practically 
every day of the year, which would explain the necessity of a moist climate 
in our houses. Lehmann indicates an extension to an even lower altitude, 
and he also collected it in Ecuador, it being localised as forests of Rio 
Bogota and Santiago, in the province of Esmeralda, this variety being very 
similar to the type. M. Roezlii has white flowers, with a large red-purple 
blotch at the base of the petals, the crest of the lip beiny yellow, but in the 
variety alba the petals are wholly white. The history of the species is 
given very fully at pp. 249-251 of our sixteenth volume. 
FEW years ago Messrs. Sander & Sons obtained among their 
Peruvian importations a striking form of Cypripedium caudatum, 
which has been exhibited on several occasions under the name of C. 
catidatum Sandere. At the R.H.S. meeting held on May 8th last it received 
an Award of Merit (see p. 137), and as the species was originally described 
from Peruvian materials, a summary of its history may be interesting. 
Cypripedium caudatum was originally described by Lindley in 1840 
(Gen. & Sp. Orch., p. 531), the author remarking: ‘‘I have only seen one 
mutilated flower of this extraordinary plant, obtained at Lima from an 
herbarium of Ruiz & Pavon, and sent by Matthews to Sir William Hooker.” 
This Herbarium was made by the Spanish botanists, Ruiz and Pavon, 
during their exploration of Peru over half a century earlier, and the plant 
was probably collected in the Huanaco district, where it was afterwards 
met with by William Lobb, when travelling for Messrs. Veitch. From a 
dried specimen sent home by Lobb the species was figured in 1844 (Hook. 
Ic. Plant., vii. t. 658, 659), and it is remarked that Mr. Lobb ‘‘sent home 
dried specimens, and brought living roots with him as far as Jamaica, but 
they perished while he was there confined with a malignant fever.” The 
plant was again collected in Peru by Davis, when travelling for Messrs. 
CYPRIPEDIUM CAUDATUM. 
