STEVENS: NortH DAKOTA PLANTS 97 
are unusually thick and dense and the seeds are pitted on the 
upper side. I am inclined to think it is a plant of C. album with 
an unusual amount of well-matured fruits and therefore with 
the spreading calyces unusually prominent. 
The seeds of these species are described by Standley as 
“nearly smooth, black and shining”’ except in C. ferulatum, 
where they are said to be “‘puncticulate,” but I find in our 
material that C. album has pitted seeds and C. ferulatum 
smooth (excepting as in No. 2 just noted; type material from 
Lunell also examined). The seeds of C. leptophyllum seem to be 
quite easily distinguished from those of the other common field 
species by their smaller size. 
{| CHENOPODIUM PRATERICOLA Rydb. Narrows, Aug. 12, 
1913, Lunell. 
} ATRIPLEX PATULA L. Wahpeton, Aug. 6, 1919. Alonga 
street by buildings. Dr. Standley, who examined a specimen, 
writes that this species is perhaps only a form of A. hastata L., 
but we seem to have no other specimens which would be referred 
to this form. 
} SUCKLEYA SUCKLEYANA (Torr.) Rydb. Belfield July, 4, 
1914. 
CORISPERMUM 
Following Standley’s treatment of this genus (N. Am. FI. 
21: 79-80. 1916) I would place our material as follows: 
C. hyssopifolium L. Mandan, Wright 610. 
+ C. nitidum Kit. Sandhills near Anselm, Aug. 21, 1918. 
+ C. villosum Rydb. Sandhills near Anselm, Aug. 21, 
1918; also all other specimens referred by Bergman to C. hyssopi- 
folium, except Wright 610. The Fargo specimen of C. villosum 
was collected along the railroad (doubtless introduced in gravel) 
and no plants have been observed since. It was a well matured 
plant with very little pubescence except on the bracts. The 
Anselm plants are young, upright, rather slender, and densely 
pubescent. 
PotyGonumM HypropirpEr L. Hankinson, July 30, I9g19. 
Lunell (Am. Mid. Nat. 5: 184. 1918) has referred the Ft. Ransom 
specimen to P. punctatum leptostachyum (Meisn.) Small, but 
it has dull akenes and flowers in the lower axils, as in P. 
Hydropiper. 
ASCLEPIAS SYRIACA L. Westfield, July 16, 1919. This does 
not seem to be common so far west. The specimen reported 
