412 THE ORCHID REVIEW. { APRIL, 1913. 
Z.™Mackayi crossed with the pollen of Odontoglossum crispum, but in every 
case the Zygopetalum has been reproduced pure and simple, this result being 
clearly due to a kind of parthenogenesis, the Odontoglossum pollen causing 
the ovules to develop without fertilisation being effected. Hybrids are not 
expected on this occasion, but the capsule seems to be following the normal 
course of development. 
This house contains a good collection of Cattleyas, Leliocattleyas and 
allies, and among hybrids raised in the collection were pointed out Cattleya 
Mantinii, Brassocattleya Veitchii (with very short bulbs), and a number of 
Brassavola Digbyana hybrids, which include seedlings from Cattleya 
Dowiana aurea, C. Mendelii, C, Mossiz, Lelia purpurata and L. tenebrosa 
as the other parent. There were also a few imported plants of Cattleya 
Warscewiczii and C. Dowiana aurea mixed, which may possibly contain 
examples of C. Hardyana. A plant of Vanilla planifolia is trained on a 
wire beneath the roof, and is approaching flowering size. 
The next is a small house originally put up for raising Cattleya seedlings 
in, but Mr. Moss being now chiefly occupied with raising Odontoglossums 
this house is occupied with other things. A little batch of Miltonia vexillaria 
was growing with remarkable vigour, also a few plants of Epidendrum 
vitellinum autumnale, a branching variety which was obtained from Messrs. 
Mansell & Hatcher. Some plants of Vanda ccerulea were establishing them- 
selves, and we also noticed a few Cymbidiums and a very strong seedling 
‘Odontoglossum, raised from O. Edwardii and O. coronarium by Mr. 
Armstrong, which should produce a very curious hybrid. 
The Odontoglossum house is a span-roofed structure 40 feet long by 12 
feet broad, running east and west, with side stages and a path down the 
centre. lt is provided with top ventilation and shutters at the sides, and is 
shaded on the south side with a lath roller blind fixed about 15 inches above 
the roof glass. One noteworthy feature it possesses is that the sides and end 
wall are built hollow, with cross ties here and there, and the air cavity pro- 
vides a very efficient check against fluctuations in temperature. The house 
is provided with two rows of piping on each side, and Mr. Moss believes in 
a rather higher temperature for Odontoglossums than is sometimes given, 
especially in the winter. He also finds that in this breezy situation the 
ventilators have often to be used with great moderation to prevent an undue 
loss of heat and moisture. 
The house contains a select collection, a process of weeding out the 
poorer and ordinary forms having been carried on for a long time, and we 
noted some choice forms of Odontoglossum crispum and a lot of hybrids, a 
number of which have been raised in the collection. Hybridisation has 
been carried on for a considerable time, and we saw seedlings in every stage, 
including a good number in flower, while capsules from some very promising 
