+ NEW OR NOTEWORTHY SPECIES. 233 
V T. AMMOPHILUM. A. Nelson in Herb. Stoutish, but mul- 
ticipitous and depressed, the leaves and numerous decumbent 
scapes only 2 or 3 inches long; herbage wholly glabrous: 
leaves oblong, or spatulate-oblong, acutish, evenly but not 
strongly runcinate-toothed: outer involueral braets in a 
single and even scanty series, thin and pale, oval to ovate- 
lanceolate, erect; the inner narrowly lanceolate, their tips 
slightly and somewhat scariously dilated: achenes dis- 
tinctly though not strongly compressed, of a dark red- 
brown, muricate at the acute summit, the four principal 
angles tuberculate below, the intervening ones similar 
except as being less prominent; stipe of pappus nearly 
thrice the length of the achenes. 
Collected in the moist grassy valleys of Sand Creek, 
Wyoming, in good flower and fruit, 31 May, 1900, by Prof. 
Nelson, and distributed by him under n. 6,987. The 
species is an excellent one, and differs from all other 
American forms known to me in its dark-red achenes; a 
point of seeming contact with the Old World 7. erythros- 
permum, which, now naturalized on the Atlantic coast, is 
otherwise of very different character. 
New or NorEWoRTHY SPECIES.—XXVIII. 
V'THALICTRUM FissuM. Two feet high, slender but rigid, 
leafy up to the rather narrow panicle; herbage altogether 
puberulent and glandular-dotted even to the flowers and 
achenes, except the mostly glabrous and glandless upper 
face of the leaflets; these of somewhat triangular outline, 
often deeply 3-parted and the divisions trifid, or some 
almost subpinnately cleft into 5 to 7 obtuse or acutish seg- 
ments: sepals not seen: achenes straight, of nearly elliptic 
