TREES OF THE MISSOURI BASIN 
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Eihes gracile Miehx. Gooseberry. Missouri Valley (LHP), 
11 (HBC), Sioux Eapids (LHP). 
Ribes Grossularia L. European Gooseberry. Commonly cul- 
tivated. 
Rihes floridum L’Her. Wild Black Currant. Sioux City 
(LHP) , Sioux Rapids (LHP) . 
Rites rubrum L. Garden Currant. Commonly cultivated. 
Ribes aureum Pursh. Golden Currant. Commonly cultivated 
for ornamental purposes, also an escape. Hamburg, Council 
Bluffs, Logan, Payne. ^ 
PLATANACE^ Sycamore Family. 
Plat amis occidentalis L. Sycamore. Sioux City 21 (RST) 
cultivated, Hamburg 40 (LHP & HBC), Payne (LHP & HBC). 
Low alluvial bottoms ; some large trees on the bottom lands near 
Hamburg, also on the banks of the Missouri near Payne. The 
species apparently does not extend much north of Fremont 
county. 
ROSACEA, Rose- Family. 
Physocarpus opulifolius (L.) Maxim. Nine-bark. Cultivated. 
Whiting, Council Bluffs. 
Spiraea trilobata L. Bridal Wreath. Cultivated. Known 
as S. Van Bonttei. 
Spiraea Thunbergii Sieb. Bridal Wreath, Spiraea. Common- 
ly cultivated. Sioux City, Hamburg, Missouri Valley, Sioux 
Rapids, etc. 
Spiraea Japonica L. Cultivated. Whiting. 
Pyrus communis L. Pear. Cultivated. Council Bluffs, 
Hamburg, Payne, etc. 
Pyrus baccata L. Siberian Crab. Commonly cultivated. 
Pyrus prunifolia Willd. Crab. A variable group of hybrids. 
The so-called crab apples. Commonly cultivated. 
Pyrus ioensis (Wood) Bailey. Wild Crab. Not common in 
western Iowa, Hamburg, Sioux Rapids (LHP). 
Pyrus maliis L. Apple. Commonly cultivated. . Also a 
hybrid group, in all probability. 
Pyrus Aucuparia L. Ehrh. European Mountain Ash. Com- 
monly cultivated for ornamental purposes, Sioux City, Missouri 
Valley. 
Amelanckier spicata (Lam.) C. Koch. This occurs in the lake 
region but we have not seen it southward. 
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