208 SAPINDACEAE. 
SAPINDUS. Soapberry. 
(Family Sapindaceae). 
Trees (some species erect or 
climbing shrubs): deciduous or 
some species evergreen. Twigs 
rather stout, somewhat fluted: 
pith rather large, roundish, con- 
tinuous, pale. Buds sessile, su- 
perposed, depressed-globose, with 
2 exposed scales, the end-bud 
lacking. Leaf-scars alternate, lit- 
tie raised, rather large, triangu- 
lar or somewhat 3-lobed: bundle- 
traces 3, large but indistinct: sti- 
pule-sears lacking. 
Winter-character references:— 
Sapindus Drummondii. Hitch- 
cock (1),'4.f. @F (6) 40 @.u1u- 
kurosi. Shirasawa, 237, pl. 2. 
Acer and Aesculus, now made 
the basis of distinct families, were 
formerly placed in the Sapinda- 
ceae, the name of which, as of 
its typical genus Sapindus, refers to a saponifying glucoside, 
saponin, which occurs abundantly in the buckeyes. One Case 
has come to my knowledge in which pollen of Aesculus glabra 
caused a severe inflammation of the eyes that extended to 
the throat and bronchial tubes and was held to be the pre- 
disposing cause of a fatal pneumonia infection. 
1. Twigs and buds quite glabrous. : S. Saponaria. 
Buds, at least, pubescent. 2. 
2. Twigs becoming nearly glabrous. 
(Wild China-tree). (1). S. Drummondii. 
Twigs persistently yellow-tomentose. S. marginatus. 
