130 BOTANICON siNictiat. 
Lt Tane-cut [3rd cent.]:—The lan ts‘ao is the same 
plant as that which the people now cultivate under the name of 
Ab 22 FH tu liang iang [Fragrance from Tu liang, in Hu 
nan, App. 870]. The tse lan [see the next] is also called 
_ tu lang hiang. 
Su Kone [7th cent.]:—The lan, a fragrant plant, is the 
same as the tse lan. It has a round stem, a purple receptacle 
of flowers. In the 8th month the flowers are white. It 
is commonly called lan hiang (fragrance) and grows by the 
sides of rivulets. It is also much cultivated as an ornamental 
plant. 
Han Pao-suenc :—The lan ts‘ao grows in low, damp 
places. Its leaves resemble those of the tse lan, but are 
longer, pointed and coarsely toothed. Flowers red and white, 
fragrant. 
Cu‘en Ts‘ana-x't:—The lan ts‘ao and the tse lan are 
two distinct plants. The lan ts‘ao grows by the sides of 
marshes, its leaves are glabrous, succulent. The root is 
small and of a purple colour. It is gathered in the 5th and 
6th months and dried in the shade. This is the tu lang 
hiang. Women mix it (it seems the leayes) with oil to dress 
their hair.—The tse lan has pointed, slightly hairy leaves, 
not glabrous, and is succulent, Square stem, purple joints. 
This is the plant regarding which Su Kune states that it 
bears white flowers in the 8th month. 
Lt Sat-comn :—The lan ts‘ao and the tse lan are two 
Species of the same genus. Both grow on the borders of 
water-courses or in swamps. They have perennial roots; — ‘ 
purple, branched stems with red joints, opposite leaves 
issuing from the joints, slightly serrated. But the lan tsa 
has a round stem, long joints (internodes), glabrous leaves 
whilst the tse lan has a nearly square stem, short joints and 
leaves covered with hair, The young leaves of both are 
