7° THE ORCHID REVIEW. [MARCH, 1922. 
and flower as vigorously and freely as any other member of the genus. 
The most suitable compost for them will be found to consist of two parts 
turfy loam, one part peat or fine Osmunda fibre, to which has been added a 
small quantity of pieces of mortar rubble, limestone or chalk; potted in 
fairly deep, well-drained pans, they should be given a position close to the 
roof-glass at the cool end of the East Indian or warm end of the Cattleya 
or Intermediate house, and given abundant supplies of water the whole 
year round. Probably a great deal of the difficulty which some growers 
experience with these species is due to the stagnant, moisture-laden 
atmosphere of many houses not being conducive to that hard and vigorous: 
growth without which free flowering isan impossiblity. Collectors state that: 
the plants are invariably found growing in nature, upon almost bare lime- 
stone rocks, in which position the atmosphere would be a great deal dryer 
than that usually accorded them. One can readily see that the degree of 
moisture in the air would vary considerably from hour to hour ; the atmos- 
phere in the early morning would be heavily charged with moisture, while 
the plants would no doubt be covered with dew, but as the sun gathered 
power and rapid evaporation took place the air would become much more 
buoyant and quite possibly distinctly dry and hot, to be followed again by 
heavy dew as evening approached. This atmospherical dryness at mid-day 
to ensure a close imitation of nature is almost completely ignored by most 
amateurs, and quite a few professional growers, who labour under the 
delusion that a sticky, stagnantly humid atmosphere, is needed by alk 
Orchids alike, whether they be found in nature upon bare rocks or in dense 
steamy tropical jungles. Were this practice of varying the atmosphere as: 
suggested tobe more frequently adopted, with many species as well as those 
under review, it would, I feel sure, be the means of avoiding a great deal of 
weak and sappy growth. 
It woutd be impossible in the space of a brief article of this nature to: 
shin 8 S Hn list of the hybrids of this distinct group; they 
: parents and invariably with good results The most 
important hybrids are as follows: 
Of bellatulum : Dora Crawshaw, Lawrebel, Rolfei, Chapmani, 
Gratrixie, Helen ii., Chas. Richman, and Gertrude Hollington. 
Of C. concolor : Tessellatum, Annie Ayling, conco-bellatulum, conco- 
Lawre, Olivia, and Mrs. F. Wood. 
Of Godefroye : Fletcherianum, Daisy Barclay, Roger Sander 
Hindeanum, and Dowlingianum. 
Of niveum: Purity, Venus, Tautzianum, Antigone, Vipanii, and 
Telemachus. 
Many more can easily be obtained from show reports and the catalogues 
of the various traders. 
