46 
IOWA ACADEMY OF SCIENCE 
JUGLANDACE^ Walnut Family. 
Carya ovata (Mill.) K. Koch. Shell bark hickory. Hamburg 
(LHP & HBC), Payne (LHP & HBC). Not common in Iowa. 
Carya ovalis Sargent. Hamburg (HBC), Payne (HBC & 
LHP). 
Carya cordiformis (Wang.) K. Koch. Pignut. Payne (LHP 
& HBC), Council Bluffs 41 (LHP & HBC), Missouri Valley 
(HBC), Oto 42 (HBC), Hamburg 22 (LHP & HBC), Sioux 
City 5 (HBC). This species is distributed much farther north 
than the shellbark hickory. It is reported from Sioux Rapids 
on the Little Sioux by L. H. Pammel. 
Juglans nigra L. Black Walnut. Oto 31 (HBC), Sioux City 
24. 3, 23 (HBC), Council Bluffs (HBC & LHP), Payne (LHP 
& HBC), Sioux Rapids (LHP). Common in bottoms. 
Juglans cinerea L. Butternut. Cultivated. Missouri Val- 
ley (HBC). 
BETULACE^. Birch Family. 
Corylus americana Walt. Hazelnut. Oto 10 (HBC), Sioux 
City 7 (HBC), Missouri Valley (HBC), Council Bluffs (LHP 
& HBC), Payne (LHP & HBC). The hazelnut is more common 
in southwestern Iowa than northward. 
Ostrya virginiana (Mill.) K. Koch. Hop Hornbean. Oto 46 
(HBC), Sioux City 6 (HBC), Hamburg 28 (LHP & HBC), 
Logan (LHP), Council Bluffs 55 (LHP & HBC), Missouri Val- 
ley (HBC), Payne (LHP & HBC), Sioux Rapids (LHP). More 
common southward than northward. In protected ravines. 
Betula alba L. White Birch. Commonly cultivated. Sioux 
City, W^hiting, Missouri Valley. 
Castanea dentata (Marsh) Borkh. Chestnut. Cultivated. 
AVhiting, scarcely hardy here. Also cultivated southwestern 
Iowa and liardj^ 
FAGACE.^ Oak Family. 
Querciis macrocarpa Michx. Bur Oak. Sioux City 11 (RST 
& LHP), Hitchcock (LHP), Oto 36, 22, 40 (HBC), Payne 
(LHP & HBC), Missouri Valley 21, 73 (HBC), Council Bluffs 
82 (LHP & HBC), Hawarden (LHP). 
Quercns alba L. White Oak. Frank C. Pellett reports it from 
Cass county. Specimens have not been seen by us. This is also 
reported from Harrison county by Von Bayer. 
