149 
Ranunculus sceleratus L. Sp. Pl. i, 551 (1753). 
Banks of Middle Loup, Thedford, June 16; Mullen, July 18; dry lakes west of 
Whitman, September 19 (No. 1333). 
Ranunculus pennsylvanicus L. f. Suppl. 272 (1781); or, R. canadensis Jacq. Misc. 
ii, 842 (1781). 
Very variable; it has sometimes sessile leaflets. Specimens fully 1.5 meters high 
were found on the Middle Loup, near Mullen, July 17. It was also collected at the 
forks of that river July 26, and near Cody’s Lakes, August 9 (No. 1559). 
Ranunculus sp. 
A low and apparently subcespitose plant, rooting in the mud. I found no speci- 
mens in bloom or in fruit. The leaves somewhat resemble in texture those of R. 
nuttallii, especially those of the variety repens,' but they are larger, ternately divided, 
the divisions cleft into 3-lobed segments. It is common in the dry lakes of Grant 
County; September 19 (No. 1789). 
Delphinium carolinianum Walt. Fl. Car. 155 (1788). 
A low, leafly form peculiar to the sand hills and dry plains of western Nebraska. 
The plant is glandular as well as pubescent, especially so on the peduncle. It is the 
same form as No.8 of my western Nebraska collection. Thedford, June 19; Norway, 
June 22; Plummer Ford, July 8 (No, 1360). 
PAPAVERACES,. 
Argemone albiflora Hornem. Hort. Hafn. 489 (1813-15), 
Dr. Watson referred the Argemone common on the plains east of the Rocky Moun- 
tains to 4, platyceras Link & Otto, Icon. i, 85 t. 43 (1828). Hornemann’s name is older, 
and that it belongs to this and not to the white-flowered form of A. mexicana, to 
which De Candolle referred it, can be seen from the original description: ‘‘Capsulis 
5-6-valvibus pedunculatis, foliis subspinosis.” 
In 4. albiflora the capsules are generally peduncled, while in A. mexicana they are, 
as a rule, subtended by the uppermost leaves. The figure and description of 4. 
albiflora, published a few years after the original description in Bot. Mag. xlix, 2342, 
corresponds to our plant. Neither it nor our plant has the white blotches on the 
leaves characteristic of A. mexicana. Thedford, June 19; Dismal River, June 29; 
Mullen, July 19 (No. 1358). 
NYMPHAACES. 
Nymphea advena Soland. in Ait. Hort. Kew. 11, 226 (1789), 
This was collected only in Swan Lake, Grant County, August 7 (No. 1650). 
CRUCIFER 4. 
Roripa palustris hispida (Desv.); Brachylobus hispidus Desv. Journ. Bot. iii, 183 
(1809). 
In the lake region of Grant County, rare; 3 miles northeast of Whitman, July 31, 
and northwest of the same place, September 19 (No. 1787). 
Roripa obtusa (Nutt.) Britton, Mem. Torr. Club, v, 169 (1894); Nasturtium obtusum 
Nutt.; Torr. & Gr. FI. i, 74 (1838). 
In the lake region northeast of Whitman, July 29; 15 miles south of same place, 
August 3; west of same, September 19 (No. 1626). 
? Cardamine hirsuta L. Sp. Pl. ii, 655 (1753). 
Only three small specimens were collected, these in springs near Plummer Ford, 
August 3. On account of the scanty material I can not determine to which species 
they belong. I place them for the present under C, hirsuta, although they differ from 
LR. multifidus repens Wats, Bot. King Surv. v, 8 (1871). 
