June, 1902.] 



Rosette Plants of Ohio. 



29: 



the bottom of which is the terminal bud. This can be well seen 

 in case of the Dandelion in Autumn. Probably this serves to 

 protect the plant from cold as well. 



In making up a list, such as follows, one soon finds that a line 

 must be drawn where none exists and that plants must be excluded 

 that are ver}- little different from some that are included. In au}^ 

 such group a series of gradations may be found that lead to one 

 or more other groups. In these lists only those plants have been 

 included in whose life history the rosette plays quite an important 

 part. 



LIST OF BIENNIAL ROSETTE PLANTS. 



AUiaria alliaria 

 Arabis canadensis 

 Araliis brachycarpa 

 Arabis glabra 

 Arabis lyrata 

 Arabis laevigata 

 Arabis hirsuta 

 Arabis patens 

 Arabis virginica 

 Arctium lappa 

 Arctium majus 

 Arctium minus 

 Barbarea barbarea 

 Bursa bursa-pastoris 

 Cardamine hirsuta 

 Carduus altissimus 

 Carduus discolor 

 Carduus lanceolatus 

 Carduus muticus 

 Carduus odoratus 

 Carduus virginianus 

 Carum carui 

 Cichorium intybus 

 Cynoglossum officinale 

 Daucus carota 

 Digitalis lutea 

 Digitalis purpurea 

 Dipsacus SA'lvestris 

 Erysimum cheiranthoides 

 Erysimum asperum 

 Frasera carolinensis 

 Gaura biennis 

 Gaura parviflora 

 Gnaphalium decurrens 

 Gnaphalium purpureum 

 Lactuca canadensis 

 Dactuca floridana 

 Lactuca hirsuta 

 Lactuca sagittaefolia 

 Ivactuca saligna 

 lyactuca scariola 



Lactuca spicata 

 Lactuca spicata integrifolia 

 Lactuca virosa 

 Lappula virginiana 

 Lepidium apetalum 

 Lepidium campestre 

 Lepidium virginicum 

 Linaria canadensis 

 Lithospermum arvense 

 Lobelia leptostachys 

 Lobelia spicata 

 Ljchnis coronaria 

 Mariana mariana 

 Oenothera lacinata 

 Oenothera rhombipetata 

 Onagra biennis 

 Onagra biennis grandiflora 

 Onagra oakesiana 

 Onopordon acanthium 

 Pastinaca sativa 

 Potentida argentea 

 Potentilla canadensis 

 Potentilla monspeliensis 

 Potentilla paradoxa 

 Potentilla puniila 

 Ranunculus abortivus 

 Ranunculus micranthus 

 Ranunculus sceleratus 

 Raphanus raphanistrum 

 Raphanus sativus 

 Roripa palustris 

 Rudbeckia hirta 

 Salvia lyrata 

 Sisymbrium altissimum 

 Sisymbrium officinale 

 Sophia pinnata 

 Tragopogon porrifolius 

 Tragopogon pratensis 

 Verbascum blattaria 

 Verbascum thapsus. 



