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IOWA ACADEMY OF SCIENCE 



list is very long in proportion to those of other associations. 

 It is as follows : 



Typha latifolia 

 Potamogeton lonchitis 

 Potamogeton pusillus 

 Alisma plantago-aquatica 

 Paspalium distichum 

 Panicum crus-galli 

 Phleum pratense 

 Polypogon monspeliensis 

 Sporobolus asperifolius 

 Agrostis alba 

 Agrostis exarata 

 Deschampsia calycina 

 Deschampsia elongata 

 Poa annua 

 Poa pratensis 

 Poa compressa 

 Distichlis spicata 

 Hordeum murinum 

 Hordeum jubatum 

 Elymus condensatus 

 Cyperus inflexus 

 Scirpus americanus 

 Eleocharis palustris 

 Eleocharis acicularis 

 Carex praegracilis 

 Carex athrostachya 

 Lemna minor 

 Juncus balticus 

 Juncus bufonius 

 Juncus tenuis 

 Vagnera stellata 

 Salix sp. 



Populus trichocarpa 

 Alnus rhombifolia 

 Mentha canadensis 

 Verbascum thapsus 

 Pentstemon richardsonii 

 Veronica peregrina 

 Veronica americana 

 Mimulus pilosus 

 Mimulus langsdorfii 

 Mimulus floribundus 

 Verbena hastata 



Solanum dulcamare 

 Solanum nigrum 

 Urtica holosericeus 

 Rumex mexicana 

 Rumex crispus 

 Polygonum aviculare 

 Chamopodium botrys 

 Alsine media 

 Clematis ligusticifolia 

 Ranunculus sceleratus 

 Ranunculus cymbalaria 

 Ribes aureum 

 Roripa nasturtium 

 Rosa pisocarpa 

 Potentilla rivalis 

 Crataegus brevispina 

 Thermopsis montana 

 Melilotus albus 

 Trifolium pratense 

 Trifolium repens 

 Trifolium hybridum 

 Trifolium sp. 

 Medicago lupulina 

 Hosakia americana 

 Rhus glabra occidentalis 

 Rhus toxicodendron 

 Malva rotundifolia 

 Hypericum scouleri 

 Epilobium adenocaulon 

 Berula erecta 

 Centaurion exaltatum 

 Lycopus lucidus 

 Plantago major 

 Galium aperine 

 Symphoricarpos racemosus 

 Agoseris heterophylla 

 Taraxacum taraxacum 

 Iva axillaris 

 Xanthium speciosum 

 Solidago serotina 

 Euthamia occidentalis 

 Bidens cernua 



Gnaphalium palustre 

 The irrigation of a considerable tract has brought about the 

 establishment of a number of introduced species, which are 

 mainly confined to cultivated ground and irrigation ditches. 



