viii DESCRIPTION OF JACKSON COUNTY 



occur. Coming up from the south at Greenwood are Gerardia Skinneri- 

 ana, Talinum calycinum and Fimbristylis laxa. Tragia ramosa, Aristida 

 basiramea and Thaspium barbinode get as far north as Martin City, while 

 Drdba cuneifolia seems to reach its northern limit at Dodson. 



But the most interesting of all is the bog region found along the 

 Missouri bluffs west of Sibley. Many eastern plants rare in the west, 

 are here found. Naumburgia thyrsiflora, Epilobium lineare, Epilobium 

 coloratum, Dryopteris Thelypteris, Polygonum sagittatum, Dulichium arundi- 

 naceum, Carex hystricina, Carex lurida, Carex typhinoides and Cardnmine 

 Pennsylvania may be mentioned. In the rich woods adjoining, Asple- 

 nium Filix-foemina, Botrychium obliquum, Osmunda Claytoniana, Hydrastis 

 Canadensis, Caulophyllum thalictroides and Korycarpus diandras occur, but 

 often almost hidden by the luxurious growth of Asplenium angusti folium. 



In the very rich bluffs at Courtney, Carex Albursina and Bikukula 

 Canadensis may be found, while on the rocks Asplenium plalyneuron and 

 Asplenium parvulum may perchance reward the very diligent searcher. 

 On the rocky bluffs at Kansas City, Polymnia Canadensis radiata abounds, 

 although found in no other station in the county, and Thalictrum dioicum 

 has the same local distribution on the rocky bluff north of Fairmount 

 Park. 



Aquatics are not common with us, but still we have a fair share. We 

 have four good sized ponds, one at Lake City, another at Sheffield, a 

 third at Atherton called Hiffner's Lake, and a fourth at Sibley known as 

 Fish Lake. Chief among our water-plants found in these lakes is the 

 chinquapin water-lily, unfortunately confined to Lake City and Fish 

 Lake. Less noticeable, but perhaps more interesting are the Utricula- 

 rias, Potamogetons, Myriophyllum, Ceratophyllum, Ranunculus, Didiplis, 

 Monniera, Lemna, Spirodela, Azolla, Heterantheras and Sagittarias, some 

 found in but one or a few, others in all our ponds. 



With such a large city and important railroad center within its borders 

 as Kansas City, one would naturally expect to find many foreign plants 

 in Jackson County, and this expectation is amply borne out. Some of 

 the introduced plants are among our most common weeds, while of others 

 but a few clumps have been found. Although not weeds, clover (Trifo- 

 lium repens] and blue-grass (Poa pratensis} are perhaps the most common 

 of our introduced plants. In fact it is hard to believe that they are in- 

 troduced. Of the introduced plants which have become common weeds, 

 Panicum Crus-Galli, Syntherisma sanguinalis, Chaetochlva ylauca and Chae- 

 tochloa viridis, Agrostis alba, Eleusine Indica, Eragrostis major, Festuca ela- 

 tior, Bromus secalinus, Eumex crispus, Chenopodium ambrosioides, Chenopo- 

 dium album, Amaranthus retroflexus, Brassita nigra, Bursa Bur&a-pastoris, 

 Sisymbrium officinale, Pastinaca saliva, Jpomoea purpurea, Ipomoea hedera. 

 cea, Verbascum Thapsvs, Xanthium slrumarium, Helianthus annuus, An- 

 themis Cotula, Carduus lanceolata. Taraxacum officinale, Lactuca virosa and 

 Sonchns asper, are met with everywhere, and are some of our commonest 

 plants. Many native plants have taken on a weedy aspect, and with the 



