51 
Ujinia form <iuite a confusing group in which to draw consistent generic 
lines, and as a consequence have been variously treated. In our restora- 
tion of Lepfotmnia it is only necessary to point out the characters 
which separate it from Ferula, to which it has been referred, and from 
Peucedanum and Polytoenia, with which it is most likely to be con- 
founded^by American students. Ferula has mostly a membranous-winged 
fruit, no ridge on the commissural face, and a very prominent disk, all of 
which characters, as well as its general habit, are strikingly contradicted 
by Leptotoinia. The thick corky wings of this latter genus and their con- 
nection with the thin -walled pericarp (still more striking in cross-section) 
serve to separate it well from any allied genus except C'ofopfera. Peu- 
cedanwm also differs in its membranous lateral wings, which are strongly 
nerved on the ventral face at the inner margin, in the absence of a longi- 
tudinal ridge on the commissural face, and in the often solitary oil-tubes. 
In the case of those species of Peucedanum which have more than one oil- 
duct in the intervals, the decidedly membranous wings are in sharp con- 
trast with those of Leptotoenia, and simply indicate species of Peucedanum 
looking towards In fact, we have failed to discover any good 
reason why Ferula should not be incorporated with Peucedanum. In Poly- 
t(jema the corky lateral wings are found, but the same corky thickening is 
continued over the whole back of the carpel, through which small oil-tubes 
are scattered, in addition to the almost continuous row about the seed- 
cavity. 
* Oil-ttibes obsolete or very obscure (but often scattered 
vesicles simulating oil-tubes). 
1. L. dissecta Nutt. Torr. & Gray, FI. i, 630. One to 
three feet high, leafy at base: leaves broad, a foot or so long, tern- 
ate and thrice pinnate; segments ovate or oblong, to 1 inch long, 
pinnatifidly laciniate-lobed and toothed, puberulent on the veins 
(beneath) and margins: umbel 8 to 20- rayed, v/ith an involucre of 
few linear bracts, and involucels of several linear bractlets; rays 2 
to 5 inches long: flowers yellow or purplish: fruit sessile (but 
stei'ile flowers pedicelled) or nearly so, 5 to 0 lines long, about 8 
lines broad: strengthening cells in the distinct filiform dorsal and 
intermediate ribs, as well as in the laterals: seed-face plane. 
(Fig. 34 .) — Ferula dissecta Gray. Proc. Am. Acad. vii. 848. 
F. dissoluta Watson, Bot. Calif, i. 271. 
From S. Califoi’nia to British Columbia (Macoun). FI. April to July. 
2. L. multifida Nutt. l.c. Like the preceding, but with 
more finely divided leaves, umbels mostly without involucre, 
pedicels of the fruit 3 to 12 lines long, fruit 4 to 6 lines long, no 
strengthening cells in the almost obsolete dorsal and intermediate 
