THE BOOK OF ORCHIDS 



Ada 



The bright coloured Ada aurantiaca grows on the 

 Eastern Cordillera of New Granada at 8000 feet eleva- 

 tion. Its cultural requirements are exactly the same as 

 prescribed for the cool Odontoglossums. 



Angr^cum 



The genus Angrsecum include a group of remarkable 

 epiphytal Orchids of variable habit, the most noticeable 

 character being the long tail-like spur dependant from 

 the base of the labellum. Nearly all the species have 

 pure white flowers, many of them being very fragrant. 

 About one half of the Angraecums are natives of Mada- 

 gascar, as A, articulatum, A. citratum, A. eburneum (the 

 largest growing plant of the genus), A. Ellisii, A.fastu- 

 osum, A. hy abides, A. Humbloti (Leo/iis), A. metal licum and 

 A. sesquipedale. The latter species when in bloom always 

 attracts attention on account of the remarkable character 

 of its flowers, which are large, bold, and of ivory white- 

 ness, and furnished with spurs often exceeding a foot in 

 length. A. Sanderianum and A. Scottianum are from the 

 Comoro Islands, a small group to the north-west of 

 Madagascar. Several, including A. arcuatum, are from 

 South Africa. The rare A. Kotschyi is reported to be 

 from the neighbourhood of the Zanzibar River. Others 

 as A. bilobum, A. Chailluianum, A. distichum, A. pellucidum 

 and A. pertusum (known as the fish-bone Orchid), are 

 from the West Coast of Africa. With the exception of 

 A. Kotschyi which requires the highest temperature 

 available, Angraecums do well in a shady part of the 

 Cattleya house during the summer months, but during 

 winter the coolest end of the East Indian house is more 

 suitable for them. Their general treatment is similar to 

 that of Aerides. One other exception is found in A. 



