THE ORCHID GENERA 97 



the tropical species of which 0. ampliatum, 0. Carthagin- 

 ense, 0. hamatochilum, 0. Kramerianum, 0. Lanceanum, 0. 

 luridum, 0. papilio and 0. splendidum may be cited as 

 examples, it will be found that, to grow these well, a 

 high moist temperature is necessary, though during 

 their seasons of rest they may be removed to the Cattleya 

 division. A considerable number of Oncidiums belong 

 to the intermediate section, some of the best known 

 being 0. aurosum, 0. jlexuosum, 0. Brunleesianum, 0. 

 phymatochilum, 0. pubes, 0. sarcodes, 0. sphacelatum, 0. 

 trulliferum and 0. Wentworthianum. Probably the most 

 beautiful of the Oncidiums are to be found among 

 those that thrive under the same treatment as the cool 

 Odontoglossums, and, if a selection were made from 

 those enumerated, the wonderful form and exquisite 

 beauty of their flowers would afford much pleasure 

 to those interested in their welfare. The most familiar 

 are 0. cheirophorum, 0. concolor, 0. crispum, 0. cucul- 

 latum, 0. curtum, O. dasyty/e, O. Forbesii, O. incurvum, 

 0. lamelligerum, O. loxense^ 0. macranthum, 0. Marshall^ 

 anum, 0. o/ivaceum, 0. ornithorynchum, 0. phalanopsis , 0* 

 pratextum, 0. s erratum, 0. spilopterum, 0. super Mens, 0. 

 tigrinum, 0. undulatum, 0. varicosum and 0. zebrinum. 

 There are many differences in the habits of the species 

 mentioned. Some, such as 0. Lanceanum and hamatochilum, 

 are distinguished by large fleshy leaves, and the absence 

 of pseudo bulbs. 0. Jonesianum and 0. cebolleta have 

 terete fleshy leaves; while a few species as 0. pulchellum 

 and 0. triquetrum have nearly equitant foliage. 0. 

 macranthum and its allies produce long, shortly branched 

 flower spikes which often exceed ten feet in length. 

 0. macranthum is undoubtedly one of the handsomest 

 Orchids grown. 0. papilio is one of the most remarkable 

 Orchids ever introduced into this country, principally on 

 account of the singular appearance and structure of its 

 flowers, which, as the name implies, bear a fanciful 



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