October 26, 1907 III 
—Glabrous, perennial. Scapes 5-90cm. long, weak, usually 
longer than the leaves. Petioles 4-80 cm. long; leaf blades, when 
fully developed, saggitate, with the basal lobes one-fourth to one- 
third the length of the laminae. Inflorescence verticillate-race- 
mose. Bracts lanceolate to ovate, acute, of variable length and 
shape, and not very reliable for identification purposes. Fertile 
peduncles ascending, not reflexed in fruit, short; the sterile usu- 
ally twice as long. Fruit globose, 1-1% cm. in diameter. Beak 
of the achene less than one-fourth its length. 
I have subdivided the species as follows: 
1. Var. monomorpha L[wunell. Terrestrial or emersed. 
Stout and plump. Scapes 5-20cm. high, erect or ascendent. 
Petioles 4-18cm. long, usually curved outwards. Leaf blades 
all sagittate, broad, acute, with divergent basilar lobes. Bracts 
lanceolate, often as long as the fertile pedicels. Achenes about 
2muin. long. 
2. Vat. STRICTA J. G. Smith, 1. c..8. 7. 7. Buchenau, 1. c. 
—Scapes erect, more strict, 30-40cm. high; bracts ovate, acute. 
Terrestrial. A large var. monomorpha. 
3. Var. dimorpha Lunell. Only the lowest part of the 
plant is covered with water. Leaves abundantly developed and 
sagittate as in var. monomorpha, except 1 to 3 lanceolate or 
oval, and 1 to 3 phyllodes. Turns into var. monomorpha under 
favorable conditions. 
4. Var. polymorpha Lunell. A form showing charac- 
ters mixed from the terrestrial and submersed forms, as part of 
the plant is exposed to the air, and part is submersed in water. 
It has phyllodes, but comparatively fewer than var. cuneata. 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. cuneata than to var. monomorpha. 
