304 
country, China, where, on the mountains of Szechuan, at elevations 
of from 7000 to 9000 feet, seeds were collected for Messrs. J. 
Veitch & Sons by Mr. E. H. Wilson. The specimen illustrated 
Zuce., differing in several small characters. At Coombe Wood a 
plant has already reached a height of about 9 feet. Iris Wilsonii 
Nandi Rubber.—We have recently received for determination from 
Mr. D. E. Hutchins, Chief Conservator of Forests, British Hast 
Africa, dried specimens of a rubber-plant found in the Nandi forests, 
British East Africa. The plant proves to be Landolphia ugandensis, 
Stapf, described in the Flora Trop. Africa (Addenda), iv. 1, p. 589, 
rom specimens collected by Mr. M. T. Dawe in Dumu forest, 
Buddu, Uganda, at 4000 feet. Mr. Hutchins sends us the following 
gree. about the plant :— 
66 ; 
between 6000 and 7000 feet ; and has an abundance of mist and 
a tending further to reduce the temperature, which I estimate 
oO 
recently returned from a visit to the Nandi country, and forward 
herewith a note on the yield and conditions of growth of this 
interesting rubber.” : 
Yield.—The present normal production of rubber from the Nandi 
forest is estimated to amount to 7 tons yearly, worth about 
£2000 at present Mombasa prices : this is on a basis of only one- 
third of the vines being tapped for rubber yearly. If it is found 
that less than two years’ rest is sufficient for the vines, the yearly 
output will rise to 10 or 15 tons, and this again will be doubled if 
the present proposals for planting the Nandi rubber liana are pro- 
ceeded with. It is estimated that at present there is an average 
of 7 lianas per acre with an average dininstos of 2 inches and a 
maximum of 5 inches. The yield per vine tapped is averaged at 
