330 THE ORCHID REVIEW. [NoveMBER, 1912. 
the form so long known in gardens, with slender column and _pollinia 
normally developed ; the female is distinctly larger and more fleshy than 
the male, and has broader sepals and petals. The ovary is more than twice 
as thick as the pedicel of the male flower, and more strongly grooved, and 
the column is scarcely half as long, but at least four times as:thick. There 
are, of course, no pollinia, but a well-developed stigma, with a pair of large 
fleshy incurved wings on either side: The colour of the flowers is identical 
in the two sexes. 
These characters stand in striking contrast with such a species as C. 
maculatum, which is figured at page 315, where the male flowers are much 
smaller and more membranous than the females, and the lip is reduced to a 
rounded disc with a number of marginal teeth. This dimorphism is still 
more marked in C. densiflorum, which is figured on the opposite page, 
where the difference between the sexes are so great that nothing short of 
their production upon the same plant would be accepted as evidence of 
their specific identity. In this connection we may recall the amusing 
history of C. Egertonianum (O.R., xv. pp. 337-340, fig. 37), a species which 
was such a source of bewilderment to Bateman and his friends, and was 
hopelessly confusedavith C. ventricosum. 
C. chlorochilon was originally discovered by Moritz, who sent specimens 
in 1836 from Maracaybo, Venezuela, to the Berlin Museum, from which 
the species was described by Klotzach two years later (Allg. Gartenz., vi. 
p- 225). Shortly afterwards it was imported from Demerara by Messrs. 
Loddiges, in whose nursery it flowered for the first time in England, when 
it was figured *by Lindley (Sert. Orch., t. 16). It is now one of the best- 
known species in the genus, and is widely cultivated. 
C. chlorochilon is further remarkable for the enormous number of seeds 
produced by a single capsule, which has been estimated as about four 
millions, a number far in excess of that known in any other Orchid. In 
other words, the progeny of a single flower, such as the one now figured, if 
all the seeds came up, would be about equal to the population of London. 
This capsule was from an imported plant obtained from Messrs. Hugh Low 
& Co. (O.R., xvii. p. 168). 
_ It is now known that the genus contains two very distinct sections, one, 
called Eucycnoches, in which the perianth of the two sexes is alike, or 
nearly so, and the other, called Heteranthe, in which it is very diverse, 
especially in the shape of the lip. C. chlorochilon belongs to Eucyenoches, 
together with C. ventricosum, C. Loddigesii, and three others of which the 
female is still unknown. C. maculatum and C. densiflorum belong to 
Heteranthz, which contains ten species, in seven of which both sexes are 
now known. For the history of this remarkable genus and a revision of 
the species, see O.R., xvii. pp. 269-274. 
