CHAPTER (Ge 
PROMEN AA. 
Four pretty little species of Promenza are in cultivation, 
eight being known to botanists. The genus is related to 
Zygopetalum and Paphinia, differing from them, however, 
in the following particulars: The plants are very small, 
seldom exceeding 4in. in height; the flowers are usually 
solitary, on short, drooping scapes; the lip is distinctly 
three-lobed; and the crest is formed of a tuberculose ring. 
The genus is peculiar to Brazil. 
Culture.—The species included here are found at high 
altitudes, and are distinctly alpine. They therefore thrive 
when cultivated in a cool house, such as suits Odonto- 
glossums, and they require the same kind of treatment as 
answers for such species as O. Oérstedii and O. Rossii. 
A compost of peat-fibre and good sphagnum, with a few 
bits of charcoal scattered through it, suits Promenzas, 
and they do not require much root-room. Some cultivators 
prefer to attach them to blocks of soft fern-stem; others 
grow them well in small pans almost filled with drainage. 
The plants require to be kept moist at the root at all times, 
enjoying an abundance of water during summer. A position 
close to the roof, where they would be shaded only from 
very bright sunlight, is the best for them. They flower 
irregularly, but generally about July. 
