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148 MISSOURI BOTANICAL GARDEN. 
LopHotocarrus DEPAUPERATUS (Engelm.). Sagittaria 
calycina depauperata Engelm. in herb. 
Low, 1-1. 5 dm. high. Petioles slender, ascending. Blades 
elliptical, hastate or sagittate, acute at the apex, 3-nerved, 
2-4 em. long, the lobes spreading. Scape one-half as long 
as the leaves. Fertile pedicels 1-3 em. long. Fruiting 
head 7-8 mm. in diameter. Achenes obcuneate, truncate, 
1.7 mm. long, 2 mm. wide, the slender horizontal beak 
one-third the width of the achene. Type collected by Dr. 
George Engelmann, Missouri, Sept., 1858. Margins of 
ponds, Wisconsin to the Indian Territory. June—Septem- 
ber. — Plate 55. 
Specimens examined from Wisconsin (T. J. Hale, Prairie du Chien, 
1861); Illinois (H. M. Patterson, Oquawka); Missouri (Dr. Geo. Engel- 
mann); Indian Territory (No. 331, E. Palmer, 1868; No. 268, M. A. 
Carleton, Cherokee Outlet, June 24, 1891). 
LorHorocarrus sponeiosus (Engelm.).  Sagittaria 
calycina spongiosa Engelm. A. Gray, Manual, 5th 
edition. 493. 1867. 
Submerged aquatic, with thick, spongy, nodose petioles 
and scapes. Petioles 1-2 dm. long. Blades spatulate and 
obtuse, or elliptical and truncate, or hastate, or sagittate, 
with the narrow, acute, falcately divergent lobes 2.5-10 
mm. wide, sometimes 8 cm. long. Scape simple, not more 
than half as long as the petioles, spongy, weak, at first 
ascending, at length decumbent, bearing two verticils of 
one to three flowers each. Fertile pedicels much thick- 
ened, 1-2 or 3 cm. long, 3-5 or 6 mm. in diameter. 
Sepals broadly ovate, obtuse, scarious at the tip and mar- 
gins, 10-12 mm. long. Fruiting head depressed-globose, 
7-10 mm. in diameter. Achene 2-2.5 mm. long, obcune- 
ate, with a narrow dorsal wing and a very short, ascending 
or horizontal beak. Margins of brackish ponds and tide- 
water marshes, New Brunswick to Virginia. Type col- 
lected by Edward Tatnall, Wilmington, Del., July, 1860, 
in Engelmann Herbarium. — Plate 56. 
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