ISS 



Kiihn'ia f/hifniosa Ell. 



Lacinaria scariosa ( L. ) Hill. 



0/iryso2)sis cai/ipor/n/i (Ti-eene. 



Solidago uliitifolin Muhl. 



Sol'tdago missouriensis Niitt. 



tSolldago neiiiornlis Ait. 



Solidago rig/da L. 



Euthainia crtroluiiatiri (L ) (rreene. 



Asler erlco'ides L. 



Lcptilon canadensc (L. ) Britton. 



lonactis I'uiariifoli IIS (L. ) (Ti-eeiie. 



Anteiincn'/'f/ sp. 



AnaphaHs iiKirgdritacea ( L. ( Beiitli. Ar Hoc)!';. 



Gnaphali inn iihtnsifcd i imi L. 



HeUopais si'ahra Danal. 



Riidbecl'ia triloba L. 



Bitdbcckia hirta L. 



Ratihida pinnata (Vent.) Barnh. 



Uvlianihus scaherri iiius Ell. 



Helianthus occide/itali.s Kiddell. 



Hcd.ianthus illinoensis Gleason*. 



*Helianthus illinoensis. — Erect, six to ten ilm. high, from a lonj; running root- 

 stock. Stem simple, slightly angled, densely villous below, pubescent above. Leaves 

 six to eight pairs, strictly opposite, slightly scabrous above, softly pubescent beneath 

 and villous on the veins, obtuse; the lowest four or five pairs oblong-lanceolate to 

 ovate-lanceolate, three-nerved, entire, ten to fifteen cm. lung, tapering at the base 

 into a villous winged petiole ei|ualing or but little shorter than the leaves; the upper 

 two or three pairs much smaller or bractlike, petiole, short or none. Lower inter- 

 nodes five to eight cm. in length, or the two lowest pairs of leaves approximate, upper 

 iiiternodes much longer. Inflorescence of one to seven heads; peduncles three to ten 

 cm. long; involucre broadly campanulate or hemispherical, eight mm. high; scales 

 lanceolate, acuminate, ciliato. Disk flowers yellow, rays about thirteen, two to three 

 cm. long, bright yellow, achenes minutely pubescent. Flowers in August. 



On the sand dunes along the Illinois river near Havana, where it is common in 

 the black-jack oak woods, especially along the edges and in the more open and sunny 

 places. Material was collected in 190S and IH04, and the type, collected on August 17, 

 1904, is in the herbarium of the Missouri Botanical (iarden. 



Ili'liiinlliiis iUiiivensis is evidently closely related to Hdknitlius oci-idi'ida/ii Riddell, 

 which it resembles in the reduction in size of the upper leaves. It is at once distin- 

 guished from the latter species by the villous pubescence and the greater length of 

 the lower internodes. The two are sometimes associated in the field, but in general 

 appearance they are entirely ilistinct. IfeliaiiHiwi nci-identdtix has broad, scabrous, 



