96 STEVENS: NorTH DAKOTA PLANTS 
In the fall of 1916 I collected twenty-six specimens in the 
vicinity of Fargo and submitted them to Dr. Standley, who 
determined them as follows: 
C. album (4); 
+ C. paganum Reichenb. (11); 
C. paganum, approaching C. album (8); 
+ C. ferulatum Lunell (3). 
Apparently C. paganum is the commonest form here. I 
have not as yet been able to make much further progress in 
clearing up the relations of these forms but wish to offer what 
few notes I have. 
C. ferulatum (which Standley notes is perhaps not sufficiently 
distinct from C. album) is separated by the fruiting calyx being 
open, exposing the fruit. While this does not seem to be quite 
constantly true for C. ferulatum, I find it also ina rather variable 
degree in the C. album specimens, being most prominent in 
well-matured plants. No. 11, determined as C. paganum, has 
calyces closed in specimen collected Aug. 25, but fruit from same 
plant collected in September shows them quite open. As to C. 
paganum, most of the plants were either so badly infested by an 
insect or so late in maturing that very little mature seed was 
obtained. From material at hand I would describe the seeds 
as follows: 
C. album—1.2-1.4 mm. wide, upper surface flattened and with 
shallow, oblong pits (which show through the pericarp). 
C. paganum—1.2-1.4 mm. wide, upper surface dull, neither 
flattened nor pitted. 
C. ferulatum—1.2-1.4 mm. wide, similar to C. PENH: 
C. leptophlyllum—o.9 mm. wide, not flattened, hini 
The size of the seed of C. paganum is given by Standley 
(N. Am. Fl. 21: 21. 1916) as 1.3-2 mm. In one of the twenty- 
six specimens, a plant collected near the woods along the Red 
River, the seeds are variable in size, measuring I.4-2 mm., but 
in all the others they are scarcely larger than those of C. album. 
The three specimens of C. ferulatum differ among themselves. 
One, collected in an old garden (No. 3), which I take 
to be typical, is pale grayish green, simple below and with short 
branches above, the leaves oblong-rhombic with four or five 
short teeth on each side; another (No. 9, labelled by Standley 
as apparently a form of C. ferulatum) is bushy branched with 
narrow entire leaves. The third (No. 2) is in a rather advanced 
condition with lower leaves mostly fallen; the flowering branches 
