158 THE ORCHID REVIEW. [JULY, 1917. 
ODONTOGLossuMS.—A dry atmosphere is most detrimental to these 
plants at this season, and every effort must be made to keep their quarters 
cool and moist. Plants of any of the dwarf-growing Mexican section, such 
as O. Cervantesii, Galeottianum, madrense, Rossii, maculatum, and others 
that are in need of new rooting material may receive attention when the 
new growths are partially made and about to push roots. They are best 
grown in shallow pans, and should be suspended at the warm end of the 
Cool house. The compost must be pressed firmly around the plants, and 
must be watered with care until the plants are re-established. 
COCHLIODA AND ITS HYBRIDS.—The whole of this family are also best 
grown in shallow pans, and they succeed under the same conditions as the 
Odontoglossums. C. Neetzliana, vulcanica, and sanguinea may have 
attention as regards repotting in the same way as Odontoglossums. 
TRICHOPILIAS.—The different species of this interesting genus will have 
passed out of bloom, and will now be forming new growths, and when 
these are about to push roots is the best time to undertake any necessary 
repotting. They succeed in the same compost as Odontoglossums, and 
should be grown in shallow pans, and given an even temperature all the 
year round. An excess of water at the roots at any season is harmful, 
as their foliage and pseudobulbs soon spot. 
CypRIPEDIUMsS that produce their flowers during the summer months, 
such as Stonei, Lawrenceanum, Rothschildianum, &c., may be given more 
root space, should they require it, immediately their flowers fade. 
DeENDROBIUMS.—The repotting of the evergreen, or the thrysiflorum 
group, of this large genus should now be completed. The Cool-growing 
species, such as D. Jamesianum, infundibulum, and others, as they pass out 
of flower and start into growth, should have attention at the roots should 
it be necessary. They must be potted firmly, in fact all Orchids which are 
grown in the materials now available must be potted so. 
Oncip1ums of the cool section, such as O. Forbesii, crispum, Gardneri, 
concolor, Marshallianum, and others which may require attention as 
regards repotting, may have their requirements attended to when the 
young growths attain the size of three to four inches in length and are 
about to emit new roots. A similar compost to that used for Odonto- 
glossums will answer their requirements, but rather more half-decayed oak 
leaves may be added. The heat-loving section, such as O. Lanceanum, 
luridum, carthaginense, and others, may also be afforded fresh rooting 
material as they reach the desired condition. These plants revel in a light 
position in the warmest house, with abundance of water whilst in active 
growth, but when growth is complete only sufficient moisture should be 
supplied to keep their leaves plump. Their thick leaves are capable of 
Standing considerable drought. 
