Amaranthaceae GH: 01781704 Chenopodiastrum simplex (Torrey) S. Fuentes, Uotila & Borsch USA: Iowa [data not captured] A. Hayden 4011 1934-9-4
Apocynaceae GH: 02179834 Apocynum cannabinum Linnaeus USA: Iowa Lake Twp., Sec. 34. Common along the banks o... A. Hayden 10,273 1934-8-10
Asteraceae GH: 01111484 Achillea borealis Bongard USA: Iowa Lake Twp., Sec. 26; East shore of Round Lake A. Hayden 10695 1934-6-27
GH: 02215142 Boltonia asteroides recognita (Fernald & Griscom) Cronquist USA: Iowa [data not captured] A. Hayden 11093 1934-9-10
GH: 02172646 Centaurea stoebe micranthos (Gugler) Hayek USA: Iowa [data not captured] A. Hayden 10796 1934-8-13
GH: 02020280 Cirsium arvense (Linnaeus) Scopoli USA: Iowa [data not captured] A. Hayden 10840 1934-8-16
GH: 02205088 Doellingeria umbellata (Miller) Nees USA: Iowa [data not captured] A. Hayden 9733 1934-8-13
GH: 01835363 Lygodesmia juncea D. Don USA: Iowa [data not captured] A. Hayden 10,526 1934-6-30
Brassicaceae GH: 01181479 Berteroa incana (Linnaeus) de Candolle USA: Iowa [data not captured] A. Hayden 5006 1934-5-22
Cyperaceae GH: 02578255 Carex atherodes Sprengel USA: Iowa [data not captured] A. Hayden 146 1934-6-25
Fabaceae GH: 02131721 Pediomelum argophyllum (Pursh) Rydberg USA: Iowa [data not captured] A. Hayden 4032 1934-7-26
GH: 02136309 Strophostyles leiosperma (Torrey & A. Gray) Piper USA: Iowa [data not captured] A. Hayden 4060 1934-9-10
Juncaceae GH: 02399103 Juncus nodosus Linnaeus USA: Iowa [data not captured] A. Hayden 232 1934-7-8
GH: 02398958 Juncus tenuis Willdenow USA: Iowa [data not captured] A. Hayden 231 1934-6-25
Lentibulariaceae GH: 01975598 Utricularia macrorhiza LeConte USA: Iowa Lake Twp., Sec. 25. Mud Lake, 5 miles north ... A. Hayden 10057 1934-7-10
Polygonaceae GH: 02364368 Persicaria amphibia (Linnaeus) Delarbre USA: Iowa [data not captured] A. Hayden 6051 1934-9-11
GH: 02364745 Persicaria coccinea (Muhlenberg ex Willdenow) Greene USA: Iowa [data not captured] A. Hayden 3045 1934-9-1
GH: 02362197 Persicaria maculosa Gray USA: Iowa [data not captured] A. Hayden 3081 1934-8-17
GH: 02361379 Polygonum achoreum S. F. Blake USA: Iowa [data not captured] A. Hayden 3036 1934-7-3
GH: 02006284 Rumex acetosella Linnaeus USA: Iowa [data not captured] A. Hayden 11330 1934-4-4
GH: 02005502 Rumex maritimus fueginus (Philippi) Dusén USA: Iowa [data not captured] A. Hayden 11328 1934-6-27
Potamogetonaceae GH: 01688331 Potamogeton illinoensis Morong USA: Iowa Lake Twp., Sec. 3. Freeman Twp., Sec. 34. bo... A. Hayden 807 1934-8-10
GH: 01746381 Potamogeton richardsonii (A. Bennett) Rydberg USA: Iowa [data not captured] A. Hayden 804 1934-8-11
Rubiaceae GH: 02359291 Galium boreale Linnaeus USA: Iowa [data not captured] A. Hayden 10,024 1934-6-20
