Hitt: Nores ON MIGRATORY PLANTS 565 
pods were well formed, but it was so late in the season, Sept. 
21, that it was doubtful if seeds would ripen. 
MENTZELIA NuDA (Pursh) Torr. & Gr. Anexample of this plant 
of the western plains was found last summer beside the track 
of the Santa Fé railroad, just west of this city. This would 
point to the line of its introduction. The handsome flowers were 
nearly two inches in diameter. 
ERYTHRAEA PULCHELLA (Sw.) Fries. A single specimen of 
this European plant was detected late in the fall of 1900 among 
some Lrachyactis angulatus, an introduction from the West which 
flourishes along the sides of unpaved streets at South Chicago. 
Last summer the little centaury plants were observed in great 
abundance in neighboring pastures and commons of the prairie. 
It was growing in the short grass like a native to the soil, and had 
the appearance of having always been there. The soil is sandy, 
naturally damp or even wet, but now dry for most of the season 
On account of drainage. It occurred in both dry and moist loca- 
tions, since the minute seeds are produced in countless numbers. 
It is well adapted, though an annual, to hold its place and spread 
rapidly. 
Lactruca putcHeita (Pursh) DC. This native of the North 
and Northwest was found last summer beside a railroad in the 
Western margin of the city. The plants were scattered along the 
edge of the roadbed for several rods, in a place where it was sub- 
ject to hard usage, which it seemed to endure well. As it was 
seeding freely and had this habit, it seemed likely to persist. 
Bromus tecrorum L. In an article in the Bulletin of the 
Torrey Club (June, 1899), I reported this as occurring beside 
a railroad east of Chicago, in the dune region of Indiana. It was 
first observed in 1897 in a single locality. Since then it has 
Spread extensively and now appears along the road in spots for 
Several miles. In some places the grass forms dense plats cover- 
ing several Square rods, but is mostly confined to ground within the 
railway inclosures. It flourishes finely in the sand, especially if 
a little damp, or quite moist in the spring. In such locations it 
attains a height of 12 to 18 inches. With its nodding panicles it 
_ 1S Not an unseemly plant for a railroad wayside. But its rather 
early fruiting and drying up expose it to fires from passing trains, 
though the seeds readily renew it annually. 
