244 Vermischte neue Diagnosen. 
It has leaf blades on long and stiff petioles raised above the surface of . 
the water, and with all the different formations varying from linear to 
sagittate. In general appearance it stands nearer to var. cuneaía than to 
var. nonomorpha. 
494. Sagittaria arifolia (Nutt.) Smith var. 5 cuneata (Sheldon) Lunell, 
l. c., p. 3. 
Syn.: S. cuneata Sheldon in Bull. Torr. Bot. Club, XX (1893), 283, 
t. 159; Smith in Rep. Mo. Bot. Garden, VI (1894), 8, t. 2; Britton and 
Brown, Illustr. Flora North. U. States, I (1896), 89; Buchenau, l. c. 
Plant submersed, rooting in mud, maybe sometimes in sand, too, slim 
and slender. Scape 20—100 em long, with the verticillate flowers reaching 
the surface of the water. Leaves with long petioles, their blades floating 
on the surface, sagittate, very much smaller in size than in the preceding 
varieties, Bracts ovate-lanceolate, usually shorter than the fertile pedi- 
cels. Achenes about 1 mm long. This variety has phyllodes, some linear, 
attenuate, nearly reaching the surface of the water, others lanceolate 
6—12 cm long, 4—8 mm broad, rosulately arranged around the base of 
the scape. 
Alle Formen von Lunell in Nord-Dakota beobachtet! 
425. Equisetum fluviatile L. var. siccum Lunell in Bull. Leeds Herb., 
no. 2 (Nov. 1908), p. 5. 
About 3 dm high and as stiff as E. Hyemale L., emitting a number 
of stems from the rootstock. Grows in dry soil. Was found on the rail- 
road bank at Sheyenne, North Dakota. 
- 426. Alisma superbum Lunell, l. c., p. 5. 
As a result of diligently repeated measurements taken in the field, 
I found that the western representative of A. Plantago has larger petals 
than specimens from different parts of Europe. — North Dakota. 
427. Alisma Geyeri Torr., l. c., p. 5. 
Pedicels (both flowering and fruiting) forming with the scapes an 
angle of 90 degrees or more; leaves elliptic to lanceolate to linear. 
a) Var. laneeolatum Lunell (= A. arcuatum Mich. var. lanceolatum 
[Buchenau] Lunell in Bot, Gaz., LIII [1907], p. 211). 
b) Var. angustissimum Lunell (— A. arcuatum Mich. var. angustissi- 
mum [Aschers. et Grábn.] Lunell, l. c., p. 211.) | 
A. Geyeri being identical with A. arcuatum Michalet ought to be the 
preferred name as it is nine years older. Vide J. Lunell, The genus 
Alisma in North Dakota, in the Botanical Gazette, XLIII, 209—214, March 
1907. — North Dakota. 
428. Allionia hirsuta Pursh. var. rotundifolia Lunell, 1. c., p. 6. 
Leaves nearly orbicular in outline. — Collected on railroad bank at 
Leeds, North Dakota. 
429, Ranunculus eremogenes Greene var. pubescens Lunell, Le, p. 6. 
Stems, peduncles and petioles more or less hairy. Quite common. 
— North Dakota. 
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