lss 



Kuhnia glutinosa Ell. 



Lacinaria scariosa (L.) Hill. 



Chrysopsis camporum Greene. 



Sol'tdago ulmi folia Muhl. 



Solidago mi&souriensis Nntt. 



Solid a go neat oralis Ait. 



Solidago rigida L. 



Euthamia caroliniana (L.) Greene. 



J.stfer ericoides L. 



Leptilon canadense (L.) Britton. 



Ionactis linariifolius (L.) Greene. 



Antennaria sp. 



Anaphalis margaritacea (L.) Benth. & Hook, 



Gnaphali urn obtusifolium L. 



Heliopsis scabra Dunal. 



Rudbeckia triloba L. 



Rudbeckia hirta L. 



Ratibida pinnata (Vent.) Barnh. 



Helianthus scaberri?nus EH. 



Helianthus occidentalis Kiddell. 



Helianthus illinoensis Gleason*. 



*Helianthus illinoensis. — Erect, six to ten dm. high, from a long 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. long, tapering at the base 

 into a villous winged petiole equaling 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 

 internodes 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, ciliate. 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 1903 and 1904, and the type, collected on August 1 7, 

 1904, is in the herbarium of the Missouri Botanical Garden. 



Helianthus illinoensis is evidently closely related to Helianthus occidentalis Kiddell, 

 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 distinct. Helianthus occidentalis has broad, scabrous, 



