MR. G. D. HAVILAND: REVISION OF THE NAUCLEER. 19 
bracteoles. The analogy between Cephalanthus and the American 
species of Uncaria is not, however, good. Whether the analogy 
between these two groups of plants is accidental, or whether 
they both bear similar witness to similar past conditions, I will 
not venture to guess. 
The species of Uncaria, at any rate, bear the clearest witness 
to Malpina having a Malayan and not an Asian flora. If 
we except Sarcocephalus cordatus, which has an unusual dis- 
tribution, and Anthocephalus indicus, which is often cultivated, 
we find in Malpina 21 species of the Tribe: of these, three belong 
to Sarcocephalus and are strictly Malayan, though one of them 
passes from the Philippines to Cochin China; three more belong 
to the genera Adina and Nauclea, of these one is peculiar, one 
is Malayan, and one is chiefly Asian but extends to Java; one 
belongs to Mitragyna and is found in Burmah, Java, and the 
Philippines ; the other 14 all belong to the genus Uncaria and 
are all Malayan, not one is Asian. It is true that Uncaria 
pedicellata extends to Pegu and to Cochin China, and that 
Uncaria ferrea extends to Mergui, but these are dominant 
Malayan forms which have overstepped their boundaries. It is 
true also that Uncaria ovata has been recorded from Silhet, but 
this is probably an error. Probably Uncaria lanosa, Uncaria 
trinervis, and Uncaria jasminiflora are peculiar to Malpina; the 
other 11 species are all found at least in either Borneo or 
Sumatra. Thus out of the 21 species, four may be peculiar, two 
are common to Asia and Malasia, the remaining fifteen are 
found in other parts of Malasia and, with one exception, are 
not known to reach even as far north as Burmah. 
If we examine the species found in Borneo we find tbat they 
number 28: of these only three reach Asia—Anthocephalus 
indicus, which is cultivated, Nauclea synkorynes, which crosses 
to Cambodia, and Uncaria pedicellata, which reaches Burmah 
and Cochin China. Of these 28 species, 5 only are peculiar to 
the island, 18 are found in Malpina or Sumatra, 9 are found in 
Java, and 8 in the Philippines; 13 being found in either Java 
or the Philippines, and of these 13, 9 are amongst the 18 found 
in Malpina and Sumatra. 
Of the 28 species, one is Anthocephalus, five Sarcocephalus, 
six Nauclea, one Mitragyna, fifteen Uncaria; so that all the 
genera, excepting Adina, are as well represented in Borneo as 
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