PLANTS OF ILLINOIS. 



21 



Riddellii, Frank. 



Low prairies. Frequent. 



negleeta, T. & G. N. 



Wet places. Peoria county, Brendel ; near Chi- 

 cago, Bahcock ; McHenry county, Vasey. 



patula, Muhl. 



Swamps. Scarce. 



arguta, Ait. 



Prairies. Near Chicago, Bahcock : Peoria coun- 

 ty, Brendel ; Washington, French. Scarce. 



Muhlenbergii, T. & G. 



Near Chicago, Bahcock. 



altissima, L. 



Hancock county, Mead ; Fulton, Wolf : southern 

 Illinois, Vasey. 



ulmifolia, Muhl. 



Low copses. Common. 



Drummondii, T. & G. S. 



Rocky hillsides opposite St. Louis, Engelmann. 



odora, Ait. S. 



W abash county, Schneck. 



nera oralis, Ait. 



Prairies and harrens. Common. 



radula, Nutt. W. 



AVith the last species. Henderson county ; Ful- 

 ton, Wolf ; Menard, Hall. 



Missouriensis, Nutt. 



Prairies. Common. 



Canadensis, L. 



Borders of woods, fields, &c. Common. 



serotina, Ait. 



Woods, and open places in low grounds. 



Common. 



gigantea, Ait. 



With the last. Common. 



lanceolata, L. 



Low grounds. Common. 



tenuifolia, Pursh. 



Dry places, throughout. Frequent. 

 CHRYSOPSIS 



villosa, Nutt. 



Prairies. Near Dixon, Vasey : Peoria county, 

 Brendel ; Mason, Mead, Bebh. 



INULA 



Helenium, L. 



Sparingly escaped from gardens to roadsides and 

 waste places. 



PLUCHEA 



foetida, DC. 



S. 



River banks. Wabash and Jackson counties, 

 and southward. Frequent. 



POLYMNIA 



Canadensis, L. 



Damp hillsides in woods. Scarce. 



var. discoidea, Gray. 



Carroll county, Henry Shimer, in Cray's Manual. 



Uvedalia, L. S. 



St. Clair county, Brendel ; Wabash, Schneck : 

 and southward. 



CHRYSOGONUM 



Virginian urn, L. 



Credited to Illinois in Gray's Manual. 



SILPHIUM 



laciniatum, L. 



Prairies. Common. 



terebinthinaceum, L. 



Prairies. Common. 



trifoliatum, L. 



Near Thornton, Cook county, Hill. 



integrifolium, Michx. 



Prairies. Common. 

 Var l^eve at Normal, McLean county, Hill. 



perfoliatum, L. 



Rich soil along streams. Common. 



PARTHENIUM 



integrifolium, L. 



Prairies. Common. 

 IVA 



ciliata, Willd. 



Union county, Forbes. 

 AMBROSIA 



bidentata, Michx. C. & S. 



Prairies. Peoria county, Brendel : and south- 

 ward. Frequent. 



trifida, L. 



River banks. Common. 



artemisigefolia, L. 



Fields, waste places, especially in low grounds. 



Common. 



psilostachya, DC. 



Dry prairies and barrens. 



Common. 



