TREES OP THE MISSOURI BASIN 
53 
Missouri Valley (HBC), Pa:^ne (LHP & HBC), Council Bluffs 
48(LHP&HBC). 
Acer Negimdo L. Box Elder. Sioux City 7, 8 (HBC), 20 
(BST), Hamburg 24, 32 (HBC & LHP), Sioux Eapids (LHP), 
Payne (LHP & HBC), Council Bluffs 9, 53 (LHP & HBC), 
Missouri Valley (HBC). Common everywhere. Its area is 
greatly extended because of the abundance of seed and ease 
with which it germinates. The form with purplish branches is 
common. 
SAPINDACE.® Buckeye Family. 
Aescidiis glabra Willd. Ohio Buckeye. It is rather strange 
that the Ohio* buckeye is not native along the Missouri, since it 
occurs in central Iowa. Occasionally cultivated. 
Aesculus Hippocastanum L. Common Horse-chestnut. Fre- 
quently cultivated. Missouri Valley, Council Bluffs, Hamburg. 
RHAMNACE^ Buckthorn Family. 
Rhamnus lanceolata Pursh. Wild Buckthorn. Sioux City 4 
(HBC), Sioux City (Bandusia Wakefield), Council Bluffs 47 
(LHP & HBC). 
Bhamnus cathartica L. Common Buckthorn. Cultivated as 
a hedge plant. Council Bluffs and Hamburg. 
Ceanothus americanus L. New Jersey Tea. Turin (LHP), 
Sioux City (Bandusia Wakefield). Common over the loess 
bluffs. 
Ceanothus ovatus Desf. Bed Boot. Council Bluffs (LHP), 
Turin, Missouri Valley (LHP), Hamburg (LHP & HBC). 
VITACE^ Grape Family. 
Psedera quinquefoUa (L.) Greene. Virginia Creeper. Wood- 
bine. Hamburg, Payne, Missouri Valley (LHP & HBC), Turin, 
Whiting (LHP), Sioux City (Bandusia Wakefield). Common 
everywhere in western Iowa. With adhesive disks. 
Psedera quinquefolia (L.) Greene var. hirsuta (Donn.) Beh- 
der. This form has pubescent leaflets and tendrils, at least when 
young, and also aerial rootlets. Hamburg (LHP & HBC). 
Psedera vitacea (Knerr) Greene. Virginia Creeper. This 
form rarely has adhesive disks, tendrils with twining branches. 
Payne (LHP & HBC), Sioux Bapids (LHP). 
Yitis cinerea Engelm. Sweet Winter Grape. Hamburg 1 
(LHP & HBC). lowa-Missouri line. This was found abund- 
