May, 1905.] Ohio Plants with Compound Leaves. 343 



growing under similar conditions should develop such a great 

 variety of leaf forms. 



The following is a list principally by families and genera of 

 Ohio plants possessing leaves that are compound or nearly so. 

 Since it is often dilhcult however, to distinguish between leaves 

 that are truly compound and those deeply divided, the more 

 typical forms have been put under separate heads with a large 

 list of unclassified ones by themselves. The finely segmented 

 immersed forms are not included in the list. 



With pinnate leaves: 



Osmunda, Woodsia, Dicksonia, Cystopteris, Dryopteris, 

 Phegopteris, Woodwardia, Asplenium, Pteris, Juglans, Hickoria, 

 Potentilla (3 species), Comarum, Agrimonia, Sanguisorba, Rosa, 

 Sorbus, Cassia, Amorpha, Kuhnistera, Cracca, Robinia, Astrag- 

 alus, Phaca, Vicia, Lathyrus, Apios, Xanthoxylum, Ailanthus, 

 Floerkia, Rhus (all but one species), Acer negundo, Aralia, 

 Fraxinus, Cuscuta indecora, Polemonium, Tecoma, Sambucus, 

 Valeriana sylvatica. 



With bipinnate leaves: 



Osmunda regalis, Gymnocladus dioica, Gleditsia triacanthos, 

 Acuan illinoensis. 



With trifoliate leaves: 



Arisaema triphyllum, Coptis, Polanisia, Proteranthus, Rubus, 

 Fragaria, Waldsteinia, Baptisia, Stylosanthes, Meibomia, Les- 

 pedeza, Falcata, Phaseolus, Strophostyle.^, Oxalis, Ptelia, Rhus 

 radicans, Staphylea, Cuscuta epithymum, Valeriana pauciflora. 



With palmately compound leaves: 



Arisaema dracontium. Cannabis sativa, Potentilla (2 species), 

 Lupinus perennis, Medicago, Melilotus, Trifolium, Lotus Psoralia, 

 Aesculus, Parthenocyssus, Panox. 



With dichotomously decompound leaves: 



Adiantum pedatum. 



With ternately compound or decompound leaves: 



Isopyrum, Cimicifuga, Aquilegia, Anemone, Syndesmon, 

 Clematis, Thalictrum, Caulophyllum, Bicuculla, Adlumia, 

 Capnoides, Dentaria, Cardiospermum. 



With leaves more or less cleft, divided, compound or decom- 

 pound and not otherwise classified. 



Onoclea, Pellaea, Helleborus, Trollius, Actaea, Delphinium, 

 Aconitum, Ranunculus, Jeffersonia, Papaver, Stylophorum, 

 Argemone. Chelidonium, Fumaria, Lepidium, Sinapis, Brassica, 

 Rhaphanus, Barbarea, lodanthus, Roripa, Cardamine, Sophia, 

 Arabis, Reseda, Aruncus, Potentilla, Geum, Ulmaria, Agrimonia, 

 Geranium, Erodium, Malva, Hibiscus, Umbelliferae (all but 4 

 genera), Hydrophyllum, Ambrosia, Silphium, Rudbeckia, Ratib- 

 ida, Coreopsis, IBidens, Dysodia, Achillea, Anthemis, Matricaria, 

 Tanacetum, Artemesia, Carduus. 



