42 ZYGOPETALUM. 



III. HuNTLEYA. Scapes one-flowered; the labellum clawed and its 

 crest distinctly fimbriated ; the column broad and crenulate at the apex. 

 Z. Meleagris, Z. Burtii. 



IV. BoLLEA. Scapes one - flowered ; sepals and petals broad ; the 

 labellum shortly clawed, the crest thick and elevated ; the column 

 broad and archnig. Z. coeleste, Z. Lalindei 



V. Warcewiczella. 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. KJa- 

 hocliorum, 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 longi- 

 tudinal lines on the face below the stigma. Z. granuneum, Z. stapelioicles, 

 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. graminifoUum, which have creeping rhizomes, and 

 in their native country affix themselves to the stems of tree ferns, 

 should be either 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, Lcelia 

 purpurata, L. elegans, etc. ; their cultural treatment as regards tem- 

 perature, ventilation, shading, etc., is essentially the same as for that 

 group of orchids. It is given in detail under Cattleya, but it may be 

 useful here to remind cultivators that the winter or resting season 

 temperature should range from 15° — 18° C. (60° — 65° F.) in the day 

 and about 3° C. (5° F) lower in the night, and the summer or growing 

 season temperature should range from 18° — 21° C. (65° — 70° F.) in the day 

 and about 3° C. (5° F.) lower in the night. The supply of water must 

 be constant during the growing season, as Z. MacA-ayi 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 

 Lselias. 



The species included in the section Promen^a are also of easy 

 culture. Being of small size, teak baskets or shalloAv pans that can 



