a guatet maatlam ts 
150 MISSOURI BOTANICAL GARDEN. 
guished from Sagittaria calycina spongiosa Engelm. with 
the type specimens of which it has been compared. The 
latter is from 10-25 em. high, the strongly nodose phyllo- 
dia often bearing elliptical blades 2-2.5 em. long. The 
achenia of ZL. spongiosus are cuneate obovate, 2 mm. long, 
and broadly winged on both margins, with the stouter beak 
nearly even with the tip of the achenium. The flowers are 
nearly twice the size of those of L. spatulatus. 
SAGITTARIA. 
SaGITTARIA EATON! n. sp. 
Monoecious, 1-2 dm. high. Phyllodia flat, broad at 
base, and gradually narrowed toward the tip. Leaf-blades 
when present linear-lanceolate, acute or acuminate, 2-3 
cm. long, 2-4 mm. wide. Scape very slender, ascending, 
weak, 8-12 cm. high, bearing one, two, or rarely three ver- 
ticils; bracts 2 mm. long, ovate, acute, connate. Fertile 
pedicels very slender, 5-8 mm. long, exceeded by the stam- 
inate ones. Flowers usually two pistillate and one stami- 
nate in the lowest verticil, the others all staminate. Sepals 
4 mm. long, ovate-lanceolate, obtuse, 4-5 nerved, the 
nerves vanishing below the tip. Petals white, with a rose- 
colored spot at the base, broadly cuneiform-obovate, 
emarginate. Achenia not seen. Pistils very numerous in 
the female flower, 80-100, very minute. Stamens 12; fila- 
ments shorter than the anther, dilated at the base, pubes- 
cent. — Plate 58. 
Collected by Alvah A. Eaton, Newburyport, Massachu- 
setts, on sandy beaches along the Merrimac River, with 
Eriocaulon septangulare, between high and low tide, but 
above the influence of salt water. It is most closely related 
to 8. teres S. Watson with which it has probably been con- 
founded. It may be distinguished from that species by the 
flattened phyllodia which seem to be entirely without 
nodes, by the rose-colored bases of the petals, and by the 
fertile pedicels shorter than the staminate. I have seen 
6 
