DISTRIBUTION, 13 
and the rest of Eastern Indo-China may be but an index of this imperfeet investigation ; 
as matters stand, however, it seems necessary to separate Tongking from the rest of 
Indo-China and treat it as an annex of China. 
An examination of the list of species in which the distribution is tabulated will show 
that, so far, 23 species have been collected within Chinese territory. One of these 
species—D. obtusifolia—has, however, to be eliminated ; it is Chinese only in name; and 
сап be included in a Chinese list only because it occurs in the Taping Valley in South- 
Western Yunnan, Physiographically, for the valley forms part of the catchment area of 
the Irrawaday, this Taping Valley is а portion of Central Indo-China ; of the two 
Dalbergias reported from the valley, one occurs nowhere in China outside its limits; 
no: exclusively. Chinona ла эшик Abe ИШЕ ОА. reasons DAL ru for the 
annexation ‘of Tongking to China equally demand the recession of the Cis-Salwin part 
of Yunnan, drained into the Irrawaday, to Central Indo-China. 
China then, modified by the inclusion of 'longking and _the separation of the 
Taping Valley, has 22 species of Dalbergia. it we exclude the littoral species, D. forta, 
which extends throughout South-Eastern Asia, we have then 21 | epecies of Dalbergia, 
of which two—D. fusca and D. stipulaces—extend to Eastern Indo-China; four—D, fusea, 
D. stipulacea, D, burmanica, and D. famarindifolia—extend to Central Indo-China ; 
And var D. rina D. ыма T tamarindifolia, D. rimosa, D, assamica, 
D. Kingiana, and D. mimosoides—extend to Western Indo-China. t : 
When the occurrence of tbese species within the Chinesé Empire is examined more 
in detail, useful subdivision of the region into threo subareas is possible, Тһево 
are: (1) South-Western China; comprising Yunnan and Western ee е; xa 
west of long. 105° E.; (2) Central China; Eastern Szechuen, CUM I ge bun " 
Kiangsi; (3) Eastern China; Chekiang, Fokien, Kwang-tung, bue í ар 
king. Central China has only four species— D. stenophylla, D. жөнінен ^ i dcn 
and |. JBalansae. Only one of these, D. stenophylla, » nee ^ i 
and it affords little direct proof of isolation because it is close ё s « a : 
D. Millettii of Eastern China, and equally closely allied to p — ty Аты 
occurs throughout South-Western China and extends ey a " — = 
D. Dyeriana occurs both in Central apd in South-Western He з Am gu Че! 
of the central region and seems only to cross into ee Т ad i Enders 
іп that proviuce. Similarly, D. hupeana occurs both w š en : e he 
China; in this case, however, the species is clearly distinctive 0 a Gc ы» 
its occurrence in Kwangtung among the eastern provinces ge! = n Rui is 
there a planted species. Оп the other hahd, | D. Balunsae, w g 27 z 
into: Central China Шом = Wem ius s. > e ses тюсте ie 
+ : 1 iangsl ОП , AE 2 
Veg e Pes Ы. not + Mb ex isolated опе, тааны стола 
1c species. ‘These are—D. obtusifolia, D. tamarindifolia, D. 222% > a d "E 
D. fusca, D. Kingiana, D. Henryana, D. burmanica, D. assamica, D. * pulace * d д зі j E 
D. "mcus D. rimosa, end D. yunaanensit. d om ХИ, d hich is а : ortion of 
species—D, obtusifelia—is only сше е m нату * 5 i d береді G China ; 
alle ; А 
a rT e $ here, only natural facts are xin tes 
боп. D, juxa D, eman, D. tamarindsfovia, D. sipulacea, d Sak 
D, Kigime are Indo-Chinese or Himalayan species that cross the frontier into бошһ- 
Western China, the only one going on into Easteru | hina g +. 
