164 THE AMERICAN MIDLAND NATURALIST 
Both species have flowers 4-8 mm. in diam., or petals 2—4 
mm. in length. The A. plantago, thus described is common on the 
European continent, but the writer collected in 1897 on an island 
in the Baltic Sea a specimen, which can not be differentiated from 
A. subcordatum, having broadly ovate, semi-cordate, obtuse leaves. 
This leaf form is the same in 
41. Alisma subcordatum superbum Lunell. 
Alisma superbum Tinell in Bull. Leeds. Herb. 2: p. 5, (1908), 
but its flowers are larger, 1-1.2 cm. in diam., petals 5-6 mm. in 
length. 
42. Alisma subcordatum stenophyllum (Aschers. et Graebn.) 
Lunell. 
Alisma Plantago (aquatica) Linn. var. Michaleti: Aschers. et 
Graebn., f. stenophyllum Aschers. et Graebn. |. c. 383, and Bot. 
Gaziua, sp. 210) (1907), im) pate: 
Has flowers of the same size as the species, but the leaves 
are lanceolate. 
The varieties of A. subcordatum are : found merely occasionally, 
but the species is abundant in wet soil throughout the state. 
SAGITTARIA Plinius, Nat. Hist. I: 21, ec 17 and 68. 
43. Sagittaria arifolia monomorpha Lunell in Bull. Leeds 
Herb: 1, p. 2, (1907): 
Leeds. 
4. Sagittaria rete stricta J. E. Smith, Rep. Mo. Bot. 
Gard. VI. (1894) 8 t. 
Occasionally found o Leeds. 
45. Sagittaria arifolia dimorpha Lunell in Bull. Leeds Herb. 
TD? Bs, KT 907) - 
Leeds. 
46. Sagittaria arifolia polymorpha Lunell in Bull. Leeds Herb. 
Tope ye (LOOT): 
Leeds. 
Natural conditions have so far almost entirely prevented 
the reappearance of this and the following varieties since the year 
when I published them (1907). 
47. Sagittaria arifolia cuneata (Sheldon) Lunell, in Bull, 
Leeds Herb. 1, p. 3, (1907). 
Sagittaria cuneata Sheldon, Bull. Torr. Bot, Club, 20: 283, 
pl. 159, (1893). 
Leeds. 
