412 
There are only three species of this genus, found in Chili and 
Peru. The leaves of K. oblonga, and of K. lanceolata, Ruiz et 
Pav., are used in their native country against fever. As in so 
many cases this popular usage doubtless depends on the bitter 
taste of the leaves, and presupposes the presence of quinine; in this 
case the error might prove fatal. 
Knightia (Proteaceae). 
The leaf of K. excelsa, R. Br., contains saponin and, in addition, 
much tannin. 
Liriodendron (Magnoliaceae), 
he leaves of L. tulipifera, L., contain small quantities of two 
special substances : hydrocyanic acid and saponin, Both are also 
present in the rare Chinese Tulip tree, L. chinense, Sarg. 
It is remarkable that the chemical nature of such a well-known 
tree had hitherto escaped attention; Lloyd, in 1886, indeed found 
an alkaloid (?) in the bark, and there are some vague indications of 
the toxicity of ZL. tulipifera, L. Various parts are used as a drug. 
Lonicera (Caprifoliaceae). 
It can easily be shown that saponin is widely distributed in this 
genus. Partly at Haarlem, and partly at Kew, I found it in the 
leaves of L. japonica, Thunb., L. Ledebourii, Eschsch, (= L. 
involucrata, Banks)—an extract froths at 1-2000,—L. Morrow, 
ray (=L. chrysantha, Lures). DL, Standishii, Hook., L. tatarica, 
L., L. tomentella, Hook. et Thoms., Z. Xylosteum, L. The haemo- 
lytic power of Lonicera saponin is slight. The commonest species, 
L. Caprifolium, L., contains but little saponin in its leaves and none 
in the berries 
Compare in this report: Adelia, Lnervilla, Symphoricarpus. 
Lucuma (Sapotaceae), 
At Kew, I was able to examine two leaves of the species 
L, deliciosa, Planch., and L. mammosa, Gaertn. Both yielded 
hydrocyanic acid, the latter the larger quantity. Benzaldehyde 
is also formed in the hydrolysis of the glucoside, At Haarlem, I 
detected hydrocyanic acid in th ; 
from Boe, inc in the seeds of L. multiflora, A. DC., 
J aert, 
which plant Peckolt had doubted the formation of benzaldehyde 
) 
