INOWLTON.] DESCRIPTION OF SPECIES. 53 
Nelumuo intermedia n. sp. 
PI. XIII, figs. 3-5. 
Lemna scutata Dii., Lesquereux, Tert. Fl., p. 102, PL LXI, fig. 2 [non fig. 5] (1878). 
Leaf thinnish, nearly circular, slightly undulate on the margin; cen- 
rally peltate, nerves about twelve or thirteen, regularly radiating, rather 
veak and tortuous, forking near or below the middle and again near 
he margin, where they form an irregular polygonal network of large 
ireoles; finer or cross nervation not well preserved. 
This species is represented in the collections by some five or six more 
>r less fragmentary examples. They vary in diameter from about 26 mm. 
o 34 mm. and are almost regularly circular, with slightly undulate 
uargins. The point at which the petiole was attached is at or very near 
he center, from which point the twelve or thirteen veins radiate in a 
egular manner. They fork near or below the middle. 
Much interest attaches to this species. Fig. 5 of PI. XIII is redrawn 
rom Lesquereux's original specimen (No. 540, United States National 
duseum), which was identified with the Lemna scutata of Dawson in 
he Tertiary Flora, page 102, and figured on PL LXI, fig. 2. In his dis- 
ussion of Pistia corrugata on page 104 of the same work Lesquereux 
ays: 
This [the peltate character] is remarked especially in the two specimens which 
have descrihed as representing Lemna scutata Daws., but which seem positively 
eierable to this species. 
And again: 
It is not so easy to explain the central appearance of the pedicel or base of the leaf 
f fig. 2 [the one here redrawn] just in the central part of an exactly round outline, 
f this specimen represents a leaf of the same kind. This could be done only by 
upposing that the lower part of the leaf with its pedicel has been folded up, com- 
ressed, and effaced by maceration, leaving only the space marked in the upper part 
f the leaf as trace of its existence. 
It is therefore clear that Lesquereux recognized its anomalous char- 
acter, and while referring it to Lemna scutata he argued strongly as to 
ts affinity with his Pistia corrugata. It clearly belongs to neither, 
>ut is undoubtedly a Nelumbo. 
In seeking for affinities among fossil forms of Nelumbo, the N. Daiv- 
oui of Hollick, 1 which was originally named Brasenia antiquahy Daw- 
on, 2 but was preoccupied by the earlier />. antiqua of Newberry, 3 is imme- 
tiately suggested. Dawson's species comes from the Belly Eiver series 
f the Canadian Geological Survey, near Medicine Hat, British Columbia. 
n order to obtain Dawson's opinion as to the probable relationship 
1 Bull. Torr. Bot. Club, Vol. XXI, p. 309 (1894). 
2 Trans. Roy. Soc. Canada, Vol. Ill, Sec. IV, p. 15, fig. in text (1885). 
s Proc. U. S. Nat, Mus. 1882, Vol. V, p. 514 (1883). 
