1888. | BOTANICAL GAZETTE, 323 
Some Indiana plants.— Viola pedata L., var. bicolor Gray. This hand- 
some variety is found to a limited extent on the sand ridges east of Ham- 
mond, Lake county. I have as yet found it in but one locality, near the 
Michigan Central Railroad, and have transplanted it to the flower garden. 
It blossomed a second time in the garden the past summer. It was trans- 
planted while in flower, as that is the only time the variety can be dis- 
tinguished amid the great abundance of the common form, which grows 
by the acre in the open sandy grounds. 
Cnicus undulatus Gray. Sand ridges near Pine Station. The plant 
is not very canescent, only whitish. It is from one to two feet high, most 
commonly from twelve to fifteen inches, and usually with a single head. 
Thad noticed this plant for some time, but had passed it by as the com- 
mon pasture thistle (Cnicus pumilus Torr.). But not being quite satisfied 
with so superficial a determination, and a botanical friend collecting with 
me having asked its name, in order to be sure of a right answer, it was 
examined critically, and found to be as above. It is not a matter of sur- 
prise to find it in the neighborhood of Chicago, as so many of the plants 
regarded as belonging farther north come up to the south end of Lake 
Michigan. It seems less white-woolly than the described form, but in 
structure of involucre and leaves is identical. In canescence it by no 
means equals its neighbor, C. Pitcheri Torr. The latter grows close by 
the shore of the lake, in the comparatively naked sand ridges, where the 
wind has free play, and is often partly buried in the drifting sand, while 
C. undulatus frequents the ridges away from the shore, more or less cov- 
ered by a variety of plants. 
Pogonia pendula Lindl. occurs in the damper grounds amid the 
pines of the same neighborhood. The flowers are white, or but faintly 
tinged with pink. 
ae ee Dunal. Near Liverpool, Lake county, by the Fort 
Wayne railroad. Only a few plants were seen, evidently introduced by 
the railroad. Should it become thoroughly established, it would be a 
very troublesome weed, on account of its prickly habit. 
Cedar Lake, near Crown Point, has furnished two specimens of Pota- 
mogeton that I have not found elsewhere in the vicinity of site 
P. Robbinsii Oakes, and P. prelongus Wulfen. On account of the number 
of species, the lake is good collecting ground for this genus and other 
aquatics. 
It is not very difficult to find here 
though I have locked for fruit by the hou 
have never found it but once or twice 1n 
1886.—E. J. Huu, Englewood, Ill. 
Ceratophyllum demersum L. in fruit, 
hour in other localities. In fact, I: 
fruit before the summer of 
