MATERIA MEDICA OF THE ANCIENT CHINESE. 469 
Cu‘en Ts‘anc-x1 [8th cent.]:—The #§ #4 t‘an huan is 
the root of a hundred years’ old po tree. It resembles the 
Hien men tung [see 176], is 8 or 4 feet long and has on one 
side small lateral roots (tubers ?) called 1 1 & tan huan chi 
(fungus ). 
Cuana Yi-st [11th cent.]:—In the illustrated Herbal of 
Shu (Sz ch‘uan) it is stated :—The Wt BE huang (yellow) po 
tree is 30 and more feet high. Leaves resembling those of 
the Wu chu yi [Boymia or Evodia. See 291] and the 
tsz* chun (Cedrela?). They do not fall off in winter. The 
outer bark is white, the inner dark yellow. Its root produces 
nodular masses resembling the fu ling which grows beneath 
fir trees [Pachyma. See 350]. This tree now grows in 
Fang chou [in Hu pei, App. 35], Shang chou [in Shen si, 
App. 278] and Ho chou [in Sz ch‘uan, App. 695] in 
mountain-valleys. The bark is tight, two-tenths or three- 
tenths of an inch thick, and of a bright yellow colour. It is 
gathered in the 2nd and 5th months and dried in the sun. 
Su Sune [11th cent.]:—It is a common tree. The best 
drug comes from Shu (Sz ch‘uan). The flesh [of the bark) is 
’ of a dark [yellow] colour. 
Lt Sat-cuey:—The name huang po is commonly but 
erroneously written 7 #4 huang po (yellow Thuja). The 
lateral tubers, which according to Cu‘zn Ts‘ANG-K‘I grow on 
the root (tan huan), are a kind of fungus. 
Ch. XXXII, 20 :—Po mu or huang po. Rude drawing 
of a tree with pinnate Jeayes. It grows in Hu nan and is 
used for dyeing. 
Lour., Fl. cochin., 525:—Pterocarpus flavus. Sinice : 
hoam pe mo. Arbor magna, in sylvis Sinensibus, cortioe 
glabro, intus suceoso, flavo, amaro. Folia umpari-pranats. 
Flos flavus papilionaceus. Florem non vidi, nisi pictum. 
Legumen breve, compressum, seminibus 2-3. Virtus corticis: 
