Jung, 1923.] THE ORCHID REVIEW. 185 
labellum shortly clawed, the crest thick and elevated; the column broad 
and arching. Z. coeleste, Z. Lalindei. 
V. WARSCEWICZELLA. Scapes one-flowered ; sepals and petals nearly 
as in Euzygopetalum, but sometimes undulated ; the labellum often very 
broad. Z.cerinum, Z. cochleare, Z. Dayanum, Z. discolor, Z. Klabochorum, 
Z. lamellosum, Z. Lehmanni, Z. marginatum, etc. 
VI. PROMEN&%A. Scapes as in Warscewiczella, but the plants of much 
smaller size; the column often but not always with raised longitudinal lines 
on the face below the stigma. Z. gramineum, Z. stapelioides, Z. xanthinum. 
Cultural Note—The species included in the section Euzygopetalum 
present no difficulty in respect of their cultivation ; in fact, the type species, 
Zygopetalum Mackayi and its varieties are among the easiest of Orchids to 
grow satisfactorily. For these, pots corresponding to the size of the plants 
should be selected, in which a drainage of clean broken crocks should be 
placed to about two-thirds of the depth, and over these a layer of moss to 
keep the drainage free from the soil above. The compost should consist of 
one-half fibrous peat and one-half fresh sphagnum, with a sprinkling of 
silver sand; the potting should be repeated annually when the plants begin 
to produce. new roots. Z. maxillare and Z. graminifolium, which have 
creeping rhizomes, and in their native country affix themselves to the stems 
of tree ferns, should either be attached to pieces of tree-fern stems or to 
blocks of wood, but they may also be grown in pots. All these species 
come from the same region as Cattleya Loddigesii, C. intermedia, Lelia 
purpurata, etc.; their cultural treatment as regards temperature, ventilation, 
shading, etc., is essentially the same as for that group of Orchids. The 
winter or resting season temperature should range from 15°—18° C. 
(60°—65° F.) in the day aud about 3° C. (5° F.) lower in the night, and the 
summer or growing season temperature should range from 18°—2r° C. 
(65°—7o0° F.) in the day and about 3° (5° F.) lower in the night. The 
supply of water must be constant during the growing season, as Z. Mackayi 
roots very freely in the compost, and Z. maxillare when on a block has its 
roots exposed. Z. rostratum requires more heat than the Brazilian species, 
and should have a shady position in the East Indian house. Generally 
speaking, the Zygopetalums require more shade than the Cattleyas and 
Leelias. 
The species included in the section Promenza are also of easy culture. 
Being of small size, teak baskets or shallow pans that can be suspended 
near the glass should be preferred. They may be treated like the smaller 
Odontoglossums, as Od. Rossii and Od. Cervantesii, during the summer 
months, but they should be removed to the intermediate house for the 
remainder of the year. eu 
The disappointing experience of the past twenty years In the cultivation 
