110 MESSRS. BAKER, MOORE, RENDLE, RIDLEY AND WERNHAM. 



Laogbian Plateau, at altitudes of from 5,000 ft. (at Dalai) to 7,500 



ft. (Langbian Peaks); a few were collected on the Dran Plateau at 



3-4,000 ft. Cyclacanthus, a new genus of Acanthaceas comes from 



tlie coastal plain at Tour Cham, where also was collected a new 



Asclepiad, Toxocarpus Klossii. 



Including the 43 novelties the endemic forms number 54, or 

 p 



thirty per cent of the whole; several are Orchids previously collected 

 in the same locality by Micholitz. Sixteen species were previously 

 known from Cambodia, Siam, or some other part of the Burmese 

 Peninsula ; the Zingiberaceous genus Geostachys, hitherto known 

 only from the Malay Peninsula, is extended in distribution by the 

 new species G. annainensis. Twelve species are Himalayan, and a 

 similar number Indian, extending in a few cases to further India 

 and the Malay Peninsula. Thirty-two species, or about one-sixth of 

 the whole, are Indo-Malayan, and 4 are Malayan. Erlocaulon 

 Hookerianum has hitherto been found only in Borneo and the 

 Malay Peninsula. Twenty-four per cent of the whole are more 

 widely distributed tropical or sub-tropical species, including, as for 

 instance among the Composite, a number of common tropical weeds. 

 The Cryptogams include a new species of fern, Adiantum Klossii 



INTRODUCTION 



BY 



C. BoDEN KLOSS, F.R.G.S., F.Z.S. 



During the spring of 1918 I spent some time in South 

 Annam, French Indo-China, and though not primarily concerning 

 myself with plants, succeeded, in the intervals of other collecting 

 pursuits, in bringing together the material dealt with below. My 

 visit, in company with Dr. Malcolm Smith, was made during the 

 second half of the dry season which is not the best time for gather- 

 ing botanical specimens, as in some of the districts where our camps 

 were made vegetation was much dried up. When I came away 

 towards the end of May the rains had just started ; the country was 

 beginning to look greener and many plants were showing signs of 

 budding : this time would apparently be the best for a botanist's 

 visit to commence ; he would not experience the pleasantest 



JOURX. NAT. HIST. SOC. SIAM. 



