92 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Additional specimens examined: 
Missourt: Swan, Taney County, 1897, Trelease 14; Little Black River near 
Pleasant Grove, 1897, Mackenzie 370; Swan Creek near Swan, 1899, Bush 749; 
Shannon County, September 16, 1888, Bush; Ironton, Iron County, Septem- 
ber, 1897, Colton Russell; Current River, Carter County, 1897, Trelease 12; 
Mineral Point, Washington County, May 29, 1892, Eggert; Greene County, 
June 2, 1888, Blankinship. 
All of the specimens listed above, with the exception of the type, are in the herba- 
rium of the Missouri Botanical Garden. We have seen no material elsewhere, chiefly for 
the reason that so few plants from southern Missouri are to be found in eastern herbaria. 
The plant appears to be not uncommon in the Ozark region. All our specimens are 
Missourian, but the range of the species must extend south into Arkansas. We have 
seen the plant growing abundantly in the James River south of Springfield, and in the 
same stream farther south in Christian County. Mr. B. F. Bush has also written us 
concerning its occurrence in the region. 
Most of the specimens cited were labeled in the herbarium as N. hybrida, evidently 
because of the characteristic color of the fruit. There seems to be no very close 
relationship between the two species, that of the Ozarks being more closely connected 
with N. advena and N. americana. From the former it differs in the coloring of the 
flowers and fruit and in the shorter leaves more rounded and obtuse at the apex; 
from the second of these species it differs in the terete petioles and the open sinuses 
of the leaves. With both it disagrees decidedly in the small number of seeds, this 
being one of the most striking characteristics of our plant. 
7. Nymphaea ludoviciana Miller & Standley, sp. nov. 
Type in the U. 8. National Herbarium, no. 441413; also material preserved in 
formalin, collected by R.S. Cocks, early in April, 1903, ‘‘in stagnant ponds, dug 
out in making the railroad track, two miles from a place known as North Shore on 
Lake Ponchartrain, about 27 miles from New Orleans,’’ Louisiana. In the National 
Herbarium other dried material of this collection is mounted on sheets 441410 to 441414 
inclusive. 
Distrisution: Southern Louisiana, near the coast. 
DESCRIPTION. 
Leaf blades floating, oblong-ovate, somewhat narrowed towards the apex, rather 
thin, 29 to 38 cm. long and 20 to 27 cm. wide, widest about the middle; sinuses closed, 
9 to 12 cm. deep; lobes rounded, slightly overlapping; blades glabrous throughout 
like the petioles, the lateral veins 23 to 25 on each side, about parallel for three-fifths 
their length, then branching dichotomously; petioles and peduncles subterete; 
flowers depressed-globose, 30 to 35 mm. in diameter, the sepals when spread measuring 
about 65 mm.; outer sepals oblong or obovate, 25 to 32 mm. long, rounded, somewhat 
narrowed to the base; inner sepals orbicular to obovate, narrowed at the base into a 
short claw, slightly longer than the outer ones and thinner; stamens in about 5 rows, 
the anthers 2 to 3 times as long as the filaments; no mature fruit with the type material 
but the immature capsules ovoid, 20 mm. high and 25 mm. in diameter, rather con- 
spicuously ribbed; stigmatic disk strongly depressed, oval or almost orbicular, 16 mm. 
in diameter; stigma rays 13 to 19, usually 17, extending to within 1.5 mm. of the edge 
of the disk, about 1.3 mm. wide, usually confluent at the base; edge of the disk shal- 
lowly crenate; color of sepals rather dark chrome yellow at the apex, becoming green 
below; petals deep chrome yellow growing paler towards the base; anthers maize 
yellow, the filaments pale cream; disk deep chrome with its rays light purplish brown. 
(Piate 41, B. Fraures 7, ¢, 19, 20.) 
EXPLANATION OF PLATE 41.—A, Fruit of Nymphaca microcarpa. B. Fruit and unopened flower of 
Nymphaea ludoviciana. Both natuyal size. 
