The Plant World 



A MONTHLY JOURNAL OF POPULAR BOTANY. 



Vol. 11. DECEMBER, 1898. No. 3. 



WISCONSIN FIELD NOTES. 



By Edivard L. Greene. 



»'T"^HE paragraphs by Prof. Pammel, published in a recent issue of 

 I this journal, relating to the flora of western Wisconsin, I have 

 i read with much interest; and the more because that field was 

 a favorite one with me in earlier days. And since even the 

 LaCrosse district, chiefly discussed in the paper referred to, has been 

 visited by me very recently, I take occasion to name here, at the out- 

 set, certain interesting species not mentioned by Prof. Pammel, but 

 whose occurrence there was noted by me during the past season. 

 Perhaps the most noteworthy are certain probable immigrants from 

 the far-western plains. The following are not known to me as having 

 ever been credited to the Wisconsin flora: 



CJienopodmm leptopJiylhtm was observed by me not only at La 

 Crosse, but also at several intermediate points between there and 

 Milwaukee, and always along the railway only, from which circum- 

 stance its immigrant character is confidently assumed. It is one of 

 the common weeds of the Rocky Mountain plains. Both Blitnin 

 rnbriim and Cycloloma atriplicifolium were observed in a few individ- 

 uals only, at LaCrosse. They can scarcely be considered as more than 

 adventive there at present. 



In the sandy prairies about Prairie du Chien I observed, in 

 greater abundance than I have ever elsewhere seen it in the course of 

 many years of travel upon its accredited territory, the curious little 

 weed, Lcptilon divarieatum — Erigcron divaricatiis of the older books 

 and lists — for which the English name of Low Horseweed is given in 

 Britton and Brown. Along with it, in its typical form and peculiar 

 habit, were mixed not a few specimens which can only be construed 

 as hybrids between this and the tall L. Canadense, or Canada Flea- 

 bane, as it is commonly called. Here also, along a railway embank- 



