Hitt: Novres ON MIGRATORY PLANTS 569 
lawns, rooting in any spot where the grass is thin, or at the inner 
edge of the curbstone, the stems creeping in the grass too low to 
be reached by the lawn mower, or hanging over the edge and 
perhaps rooting in the gutter if not disturbed for some weeks. It 
is not uncommon to find mats in favorable situations with stems 
three or four feet long. 
SALSOLA Tracus L, This was reported from this region in 
1890 or a little before. I have carefully watched it since first 
seeing it about that time, for the notoriety it had gained in the 
Northwest called particular attention to it. During this interval it 
has spread throughout our area, but is not as conspicuous or 
hardly as plentiful as it was four or five years ago, since it spread 
very rapidly at first. It is now a common weed of waste ground, 
struggling with others found in such associations. No systematic 
effort has been made to exterminate it so far as I have seen or 
been able to learn. First appearing most commonly along railroad 
lines, it shares the lot of other growth removed by the trackmen. 
Little is seen along country roadsides or in cultivated fields. In 
some vacant lots not far from my dwelling, where the soil was 
considerably exposed by the plotting of streets and construction 
of sewers but not occupied for residence, it became abundant soon 
after making its appearance there, but has since mostly disap- 
peared. Here it was left to natural conditions and no effort was 
made to get rid of it. It was a dry, sandy soil, and such grasses _ 
as Festuca tenella and Sporobolus vaginaeflorus and plants of sim- 
ilar habit proved more than a match for it. I do not think it will 
be the troublesome weed under such conditions of cultivation as 
Prevail in the Atlantic States as we were led to expect, or that 
eastern farmers need to be much alarmed by the inroad of the 
Russian thistle, It will add another to the list of weeds to be 
contended with and take its place among the rest, no more bur- 
densome in some respects than others, mainly troublesome when 
the leaves and branches become stiff in late summer and autumn, 
and by its ability to be rolled about by the wind, and lodge in 
obstructed corners. The individual plants are now on the aver- 
age much smaller than at first, less branched and more upright in 
8rowth, and, consequently, less favorably adapted to rolling. 
Their form changes as they are crowded by other plants, of which 
