Note on Lo-Kao. 
under which name one plant that yields the dye is generally 
known. Maximowicz in Mem. Acad. Sc. Petersb. ser. x, {re¬ 
print p. 8), makes R. davnrictis itself a variety of R. catharticus, 
Linn., a reduction which Forbes and Hemsley, loc. ctt., do not con¬ 
sider advisable. 
The second is R. tinctorius, Waldst. & Kit., -to which Forbes 
and Hemsley,/oc. cit., 129, reduce 7 ?. chlorophorus. Dene, under 
which name the other source of the dye is generally known. To 
this also these authors reduce R. globosus, Bunge, a plant which 
Lawson in Flor. Brit. Ind., i, 639 unites with R. virgatus, Roxb., 
reducing both to R. davuricus. Probably, however, Roxburgh s 
plant is a good species, in which case neither of these dye plants is 
indigenous in India. There appears to be no record of any attempt 
to ascertain whether indigenous species of Rhamnus will yield a 
green dye. Specimens collected by Fortune and, if not the speci¬ 
mens themselves, very likely identical with those which Thomson 
says, in the passage quoted in Jout. Agri. & Hort. Soc. of 
India, 1° ser., ix, 274 {foot note), that he sent to England to be 
determined are stated by Forbes and Hemsley, {loc. cit, 130) to be 
typical R. chlorophoinis. 
A third plant is alluded to as “ Rhamnus sp.” in Jour. Lmn. 
Soc., xxiii, 130 as gathered by Mesny in Szechuen, about 10 
miles N. of Kweiyong, at 6,500 feet elev. which is “used with other 
“ingredients to make a green dye for calicoes : its liquor being 
“blue like indigo. Neither flowers nor fruit seen.” It is further 
stated that this is very different from either of the other dye-yield¬ 
ing species, and that it is apparently an evergreen shrub. 
There are only leaf specimens of green-dye plants in the Calcutta 
herbarium. The ticket on the oldest bears “China green-dye. 
“A. H. Soc. Gardens, 19-3-56.” This should be the plant sent by 
Fortune, and be thus {teste Forbes and Hemsley) typical R. chloro- 
phofus. Dene, and therefore true R. tinctorius, Waldst. & Kit. The 
ticket on another is, “Japanese green-dye. Cultivated at Lembong, 
“Tanka-ban-Prahoe, Java, 5,200 feet, collected by Dr. King, 14-10- 
79.” This was known in Java at that time as R. chlorophorus. It 
is however different from Fortune’s plant. As it has no flowers or 
fruit, it cannot-be positively determined, but the probability is that 
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