Vermischte neue Diagnosen. 333 
uberrime ramosi, valde foliosi. Folia lanceolata, superne pubescentia 
minuta et appressa vestita vel scabra, subtus molliter et dense cinereo- 
pubescentia, conspicue tri-nervata, serrata vel superiora quidem integra. 
Capitula 3 mm alta. Bracteae involucri lineari-lanceolatae, viridi-flaves- 
centes. — A plant nearly related to this is S. canadensis L., which differs 
mainly in having its leaves narrowly lanceolate, glabrous above, and a 
minute pubescence on the nerves beneath, and narrowly linear invo- 
lucral bracts. S. procera Ait. has leaves with looser pubescence and 
with distinct soft hairs, and its heads are larger. A. scabriuscula (Porter) 
Rydb. has shorter, broadly lanceolate leaves, rugose beneath, and the 
heads are larger. S. gilvocanescens Rydb. has broad, pale leaves, yellow- 
canescent on both sides, — Dakota: The plant just described was found 
late in the season within the forest surrounding Devil's Lake, Ramsey 
County, and it was named because found in this romantic region. The 
foliage was dark green in deep shade and remarkably light green in 
the open woodland. The lower half or the lower two-thirds of the 
stems were covered with faded leaves or denuded, but this deficiency 
does probably not detract a great deal from the completeness of this 
description. 
963. Oligoneuron bombycinum J. Lunell, 1. c., p. 59. — Caules nu- 
merosi, de rhizomate crasso, perenni adscendentes, rigidi, simplices, 
densa, molli, alba pubescentia vestiti, valde foliosi, parte inferiore laminis 
petiolorum magis minusve involuti. Folia oblonga, crassa et rigida, mar- 
ginibus integris, leviter vel nequaquam scabris, pubescentia mollissima, 
alba ambobus lateribus amicta, superiora quidem parva, sessilia, am- 
plectantia, inferiora autem vehementer maiora et petiolis longis, alatis 
ornata. Folia basilaria longiores tamen petiolos habent, non alatos. In- 
volucra 6—8 mm alta, cymum compactum, terminalem sicut capitulum 
compositum formantia. Bracteae involucri, oblongae, puberulentae, pal- 
lide viridi-flavescentes. Flores radiati saturate flavi. — Dakota: The 
Soft, velvety pubescence of the stems and leaves is the principal cha- 
racter segregating this species from O. rigidum which is rough through- 
out. If O, rigidum grows exclusively in dry soil, O. bombycinum seems 
to prefer a moderate degree of moisture in the soil. The description is 
based on a specimen collected by the writer on September 9, 1910 at 
Butte, Benson County, where — if luck is not adverse — an occasional 
find recompenses the assiduous, indefatigable seeker. 
964. Equisetum kansanum J. H. Schaffner in Ohio Nat, XIII (1912), 
p. 21. — Kansas Horsetail. — Aerial stems usually 1—2!/, feet high 
annual, very smooth, 15—30 grooved, usually without simple branches 
unless broken off; color mostly light-green; surface of the ridges and 
grooves with cross or diagonal bands; sheaths long, dilated above and 
usually constricted at the base, green with a narrow black band at the 
top; teeth deciduous; cones ovate or oblong-ovate, without a point, the 
apex obtuse or merely acute, On upland clayey banks along ravines 
and hillsides, growing in rather scattered tufts. Name derived from 
