GEOGRAPHICAL DISTRIBUTION. 13 
(Leiden Herbarium) in the Liu-kiu Islands, belonging to Japan, has been positively, 
proved. D. Jenkinsianus is also possibly the most western species, though to this 
species must be added D. Manii and D. Kurzianus (a form related to D. Jenkinsianus) 
of the Andaman Group. No representative of the genus Daemonorops is as yet known 
to exist in .he Nicobar Islands, though it is not at all improbable that it may 
exist there. Daemonorops is therefore a genus essentially of the Indo-Malayan Region 
of Malaysia proper, and of the tropical Asiatic Archipelagos. Of the 83 species of 
Deemonorops known at the present day, quite 30 inhabit the Malayan Peninsula and 
the small islands on its coasts, 26 are found in Borneo, and 15 in Sumatra. Next 
comes Celebes with 5 species; Java, the Moluccas, and the Philippines have 3 
each, while the Andamans have two, 
Northern India, Siam, Cochin-China, China and the Aru Group have each 
a single species. But this enumeration will be very soon altered, as most certainly 
a large number of new species of Daemonorops still remain to be discovered 
in the not yet botanically explored parts of Borneo, Sumatra and Celebess 
and in the Philippine and Sulu Archipelegos. Of the 30 species which inhabit 
the Malay Peninsula and its islands, 24 may be regarded as endemic, a3 far as 
we know at present, 4 (D. propinquus, D. verticillaris, D. geniculatus and D, 
longipes) are thought not to be such, only, however, because they aiso grow 
across the Straits, in the part of Sumatra nearest to the Peninsula. Only one, 
D. periacanthus, grows in Singapore, and on the neighbouring Continent; ou the 
other hand, it is found unchanged in Borneo, Sumatra and Bangka. Of all the 
Daemonorops of the Malay Peninsula, this species possesses the widest geographical 
range. Of the 30 species proper to the flora of the Peninsula, D. elongatus and 
D. Lewisianus are found only in Penang, yet it may be taken for granted that future 
researches will tend to modify the delimitation of the areas of several species, for it 
is probable that others besides those mentioned, till now believed to be peculiar to 
the Malayan Peninsula, may be discovered in Sumatra and Borneo. 
As with respect to other groups of plants, so also with Daemonorops, it has 
been observed that, notwithstanding the great affinity existing between the flora of 
the Malayan Peninsula and that of Borneo, the species, or nearly all the species, of 
Daemonorops growing in one of these regions differ from those growing in the other, 
though related among themselves; thus to D. Draco, D. propinguus and D. 
micracanihus—Peninsular species, correspond in Borneo D. and Draconcellus D. mattanensis ; 
to the Malayan D. Hystrix correspond D. oxycarpus and D. Korthalsii; while 
to the Peninsular species with leaf-sheaths furnished with rings forming ant-harbouring 
galleries, such as D. Sabut, D. oligophyllus, and D. macrophyllus, Borneo opposes 
the related species D. annulatus, D. collariferus and D. mirabilis. A noteworthy fact 
is this, that about half of the 30 Daemonorops of the Malayan Peninsula belong to 
the Cymbospatha section, and are indigenous. No doubt the centre of formation of 
Cymbospatha is in the Peninsula of Malacca, but the original parent plant may have 
been D. Jenkinsianus, which from Sikkim worked its way through Assam and 
Burma in the shapes of a peculiar form down into Tenasserim (var. ¢emasserimicus) 
and there, at the extreme point of the Malayan Peninsula, generated many other 
forms. From D. Jenkinsianus, on the one side, the forms found in Siam (D. Schmid- 
tianus), in Cochin China (D.  Pierreanus) in China (D. Margaritae) would appear to 
a" 
