' WEED MIGRATION 759 



inclosing a specimen and requesting information in regard to its 

 introduction, weedy nature, diseases, etc. Replies were received 

 from most of the correspondents. From this information it ap- 

 pears that the -plant has been in parts of the state many years, 

 and several correspondents reported it as indigenous. It has been 

 in Cedar Rapids for 57 years; in Carroll county, 33 years; Mason 

 City, 45 years ; Hawkeye, 40 years ; Hampton, 37 years ; Jefferson, 

 40 years ; Mount Pleasant, 36 years ; Cresco, 35 years ; Newton, 35 

 years; Unity, 35 years; Iowa City, 30 years; Shenandoah, 35 years; 

 Neola, over 45 years; Fort Dodge, 50 years; Dedham, 35 years; 

 Rossville, 45 years. It was not, however, generally distributed in 

 the state. But it has shown wonderful aggressive powers and now 

 occurs without doubt in every county in the state. 



It is more than likely that in Iowa, at least, the weed has spread 

 from three sources: (1) Indigenous plants scattered in western 

 and northwestern counties. (2) From the Great Lakes, where 

 it is indigenous. (3) ■ From the western plains, where it no doubt 

 was indigenous. 



LABIATAE, MINT FAMILY. 

 Lance-leaved Sage (Salvia lanceaefoUa Poir.). 



Indigenous to western Iowa. Council Bluffs, Fremont county, 

 Missouri Valley, Ames, 1890 (F. A. Sirrine) ; Muscatine, 1890 (F. 

 Reppert) ; Des Moines, 1895, well established ; Harlan, 1912 (Pam- 

 mel) . 



LEGUMINOSAE, PULSE FAMILY. 

 Sweet Clover (Melilotus officinalis). 



Torrey, in 1826, gave the habitat of sweet clover as "wet mead- 

 ows." Gray, in 1848, reports it for the east; it apparently had not 

 reached Pennsylvania, since it is not recorded by Darlington. This 

 plant was observed in the vicinity of St. Louis, Missouri, in 1887, 

 and in Humboldt, Iowa, in 1892. In 1894 it was abundant in 

 eastern Colorado, Fort Collins, Denver, and other localities, indi- 

 cating naturalization for a considerable length of time. As yet 

 it is not common in central Iowa, though it was abundant in Sioux 

 City and Council Bluffs as early as 1895. It had already been re- 

 ported from Iowa City by Hitchcock in 1889, and from Muscatine 

 by Reppert in 1891. L. H. Pammel found it in Dakota City in 

 1896, and R. I. Cratty reported it from Emmet county in 1903; it 

 is rather abundant at present in Scott county. 



