ADDITIONAL notes on the kwangtung flora 
By E. D. Merrill 
Botanist, Bureau of Science, Manila 
This third paper on the flora of Kwangtung Province, China, 
is essentially like its predecessors. 1 In it have been included 
the descriptions of fifteen presumably new species, and records 
of thirty-four previously described forms either new to China 
or new to Kwangtung Province. The material on which these 
data are based has been collected by Mr. C. 0. Levine and Mr. 
G. W. Groff, of the Canton Christian College, ably assisted by 
their Chinese collector To Kang P’eng. 
In this paper have also been included some necessary changes 
in nomenclature for Chinese species occasioned by a recent pre- 
liminary study of Loureiro’s Flora Cochinchinensis. This work 
was published in 1790. It contains the descriptions of one 
thousand two hundred ninety-four species and a few varieties, 
of which about six hundred thirty were described as new, the 
others ascribed to binomials established by Linnaeus. A pre- 
liminary examination of Loureiro’s work shows that he fre- 
quently described some species twice, or sometimes even three 
or four times, under the same or under different generic names. 
In nearly one hundred cases reductions have been made, so that 
the total number of distinct species described by Loureiro is 
probably less than one thousand two hundred. In his interpre- 
tation of Linnean species he made numerous and frequently 
grave errors, and in about three hundred seventy cases, or about 
56 per cent, he was wrong in the interpretation of such species. 
Loureiro described as new a total of one hundred eighty-five gen- 
era of which forty-two are generally adopted as valid ones or, 
if strict priority be followed, eliminating those names excluded 
by the lists of nomina conservanda adopted by the Vienna and 
the Brussels Botanical Congresses, fifty should be adopted. 
Fourteen of Loureiro’s new genera have never been satisfacto- 
rily reduced and remain as doubtful ones. 
1 Merrill, E. D., Notes on the flora of Kwangtung Province, China, Philip. 
Journ. Sci. 12 (1917) Bot. 99-111; Notes on the flora of Loh Fau Mountain, 
Kwangtung Province, China, op. cit. 13 (1918) Bot. 123-161. 
