247 
Native names— Gegrip-gegrip tembaga, Getah susu, Gegrip 
merah (partly) Malacca rubber. 
Occurs in thick woods in Penang, Malacca and Selangoi , 1 ei ak 
and Sumatra. . . 
This valuable rubber vine was first discovered m 1 enang by 
Dr. James Howison, who published an account of experiments 
he made with the rubber of it in Asiatic Researches (Vol. V, 
p. 157) in 1798, under the name of the Elastic Gum vine of Prince 
of Wales’ Island, and it was the first of the Malayan Rubber 
vines discovered. It was described somewhat later in the same 
publication by W. Roxburgh, who however mistook the fruit of 
an Orchipeda for that of the Urceola. The species is easily 
known by its velvety leaves, all the other ones having the leaves 
quite glabrous on both sides. There seems to have been a good 
deal of confusion as to the product of this climber. Colljns iden- 
tified the Borneo Rubber known as Gutta Susu as the produce of 
Urceola elastica, but describes the fruit as that of a Willughbeia. 
A rubber vine shown to me in Sandakan as Getah Susu was cei- 
tainly not an Urceola , but a Willughbeia or allied plant, possibly 
W. Treacheri (Kew Report, 1880), which is the name which has 
been given to the Rubber of North-West Borneo. The Rubbers 
described by Burbidge from Borneo (Journ. As. Soc. Straits 
Branch, p. 55) are all Willughbeias or Leuconotis. I have only 
seen one species of Urceola from Borneo, a plant allied to, if not 
identical, with U. lucida, nor has any other Bornean species been 
recorded so far as I know. It seems likely therefore that all the 
real Bornean rubber is derived from Willughbeia or Leuconotis . 
It has been questioned whether Howison ’ s Elastic Gum Vine 
was not Willughbeia. He did not obtain leaves or flowers, the 
description of the stem however, with “strong ash coloured 
bark, much cracked, which runs along the ground to a great 
length,” does not correspond with that of any Willughbeia , all 
of which have black bark and which do not, as a rule, run far 
along the ground, before ascending, but agrees altogether with 
Urceola elastica, which is fairly abundant still in Penang. 
U. lucida, Benth. — A woody climber. Leaves elliptic wfth a 
long point, base rounded, quite glabrous, somewhat coriaceous, 
nerves about 10 pairs, impressed above, raised beneath, 4^ inches 
long, 2 inches wide, perfectly glabrous, petiole \ inch. Pani- 
cles axillary and terminal, often large with long slender branches 
pubescent. Flowers crowded at the end of the branches, very 
small, green. Calyx cup-shaped with five short lobes, pubescent, 
very short. Corolla short, lobes rounded, pubescent. Stamens 
5 arrow-shaped with long spurs, apices blunt. Pistil conic. Pods 
in pairs, broad at the base, tapering to a point, woody, 4 inches 
long or less, about \ inch through. Seeds few, obovate, 
pubescent, f inch long, with reddish tufts at the top, plume i| 
inch long. 
Singapore, Malacca, Penang, Perak, also Rangoon. A very 
similar plant with larger flowers was collected in Borneo at Ku- 
ching by Dr. Haviland. 
