PAPERS OX BIOLOGY AND AGRICULTURE 



175 



plants, all found within 40 miles of Chicago. The follow- 

 ing are named in addition to those already mentioned in 

 I^revious lists : — 



Lj-copus europaeus 

 Datura Stramonium 

 Festuca elatior 

 Hordeum jubatum 



Agropyron repens 

 Setaria viridis 

 Callirhoe involucrata 



The last two are possibly indigenous to the state. It 

 is interesting to note that this is the first mention made of 

 Agropyron repens. 



In 1891, the ''Flora of Cook County" by Higley and 

 Eaddin came out. It listed a total of 1223 species. In the 

 interval between 1872 and 1891, many new species were 

 introduced, several of which were noted by E. J. Hill, one 

 of the most active collectors in the Chicago region during 

 this period. In 1871, another list was published by J. W. 

 IIe^^'itt in the National History of Illinois, LaSalle Coun- 

 ty, This contained several more introduced species. The 

 following list contains those species which apparently 

 came in during this interval, a period of 25 years. For 

 convenience the various species are collected into their 

 respective families. The exact year for several of the 

 species is given in the articles consulted. For example, 

 J. E. Arthur, in 1883, was possibly the first to call at- 

 tention to the appearance in this region of Galinsoga 

 jJarviflora. 



1872-1897. 

 Setaria verticillata 

 Panicum miliaceum 

 Eragrostis minor 

 Lolium perenne • 



Agropyron biflorum 

 Agropyron caninum 

 Cynodon Dactylon 

 Bromus tectorum 

 Bromus racemosus 

 Hemerocallis fulva 

 Muscari botryoides 

 Allium vineale 

 Urtica dioica 

 Salsola Kali 



Cycloloma atriplicifolium 

 Chenopodium glaucum 

 Chenopodium Bonus-Henricus 

 Amaranthus graecizans 

 Amaranthus blitoides 

 Amaranthus paniculatus 

 Oxybaphus nyctagineus 



Silene latifolia 

 Silene noctiflora 

 Lychnis alba 

 Arenaria serpyllifolia 

 Spergula arvensis 

 Ranunculus bulbosus 

 Radicula sylvestris 

 Sisymbrium altissimum 

 Lepidium campestre 

 Lepidium sativum 

 Lepidium intermedium 

 Conringia orientalis 

 Draba verna 

 Alyssum maritumum 

 Alyssum alyssoides 

 Isatis tinctoria 

 Neslia paniculata 

 Reseda alba 

 Sedum acre 

 Sedum purpureum 

 Sempervivum tectorum 

 Hosackia americana 



