236 
I mm. broad, with very narrowly winged, divergent lobes, deeply 
emarginate at both ends, usually somewhat smaller than in the 
preceding species. 
Oregon. Coll. E. Hall (No. 459) 1871. 
5. C. longipedunculata, n. sp. 
With thread-like stems ; leaves all spatulate or oblanceolate, 
3-8 mm. long, the blades 1-2 mm. broad, rounded at the apex 
and sloping into narrowly margined petioles often longer than 
themselves, dotted with stellate scales, three-nerved, the lateral 
nerves running into each other very near the apical margin. 
Perigonial sacs longer than the fruit. Styles much longer than 
the fruit, erect, deciduous. Peduncles lengthening to 10-25 
cm. at maturity, and frequently two or three proceeding from the 
same axil, or a little below it. Fruit thick, nearly orbicular 3-1 
mm. long by about { mm. in breadth, minutely emarginate, the 
lobes divergent, with a deep intervening groove, obtusely 
margined, and with or without a very narrow wing. Nearly 
allied to a species in the Torrey Herbarium from Constantinople 
labelled “‘C. muscoides, Goldbach,” which has peduncles nearly 
as long, but with different leaves and fruit. A well marked 
species, collected in 1884 by C. R. Orcutt, on mesas, San Diego, 
California. 
6. C. verna. L, FI. Suec. ed. 2; 2 (1755.) 
C. vernalis. Koch. Syn. ed. 1, 245 (1837) not Kiitz. 
Chiefly aquatic, and quite variable. Leaves of two kinds, the 
submerged narrow, linear, one-nerved, retuse or bifid, 10-20 mm. 
long, gradually changing into the emersed, which are three- 
nerved, 8-12 mm. long, the blade 3-4 mm. broad, spatulate or 
obovate, rounded and truncate or retuse at the apex, nar- 
rowing into a margined petiole, and profusely dotted with stellate 
scales. South American forms figured by Hegelm. have rhom- 
boid-spatulate leaves. A terrestrial form, growing in places from 
which the water has receded, much smaller and more compact, 
has tri-nerved, obovate leaves 3-4 mm. long, and 1-2 mm. broad. 
There is also an entirely submerged form with the leaves all 
linear, 
Styles chiefly shorter than the fruit, spreading, deciduous. 
The typical fruit of this species is oblong in shape, I-134 mm. 
