Ill 
with winged rhachis; segments 3 to 5-toothed: peduncles 2 to 5 
inches long: umbel 10 to 25-ray ed; rays 3 to 9 lines long; pedicels 
short: fruit smooth or nearly so, about two lines long: oil-tubes 3 
in the intervals, with accessory ones beneath the ribs, 4 on the 
commissural side: seed terete, with rather deeply concave face. 
(Fig. 121 .) — Seseli divaricatum Pursh, 732; DC. Prodr. iv. 146. 
Fi’om the plains of the Upper Missouri to Oregon, and extending into 
N. W. British America. FI. May and June. 
2. M. trachyspermum Nutt. 1. c. Like the last, but more 
or less scabrous throughout: fruit scabrous, smaller, 1 to Ij^ lines 
long, with more prominent ribs: oil-tubes mostly solitaay in the 
intervals, often with smaller accessory ones in the intervals or 
beneath the ribs, 2 on the commissural side: seed sulcate beneath 
the oil-tubes, with more shallow concavity. (Fig. 122.) — M. 
divaricatum Nutt. var. Hookeri Torr, & Gray, 1. c. M, angusti- 
folium Nutt. 1. c. 
Colorado {Hall tfc Harbour 214) to Montana {Watson, Canby) and 
plains of British America. FI. May and June. 
3. M. (?) tenuifolium Nutt. 1. c. Acaulescent, somewhat 
cespitose, glaucous: leaves tripinnatifid with narrowly linear seg- 
ments: flowers said to be white: peduncles much longer than the 
leaves; umbel 12 to 20-ray ed: iruit nearly glabrous, with ribs 
nearly obsolete: oil-tubes large, 2 or 3 in the intervals. 
“Eocky Mountains” {Nuttall). 
The type specimens of this very uncertain species have been examined 
at Cambridge, Philadelphia, and New York, but the fruit is so very im- 
mature that the relationship cannot be determined. Very likely it is not a 
Musenium at all. In general appearance it resembles Harbouria more 
than anything else. 
37. EULOPHUS Nutt, in DC. Prodr. iv, 248.— Glabrous 
perennials from deep-seated fascicled tubers, 1 to 5 feet high, with 
pinnately or ternately compound leaves, narrowly linear to oblong- 
linear mostly entire leaflets (or segments), the terminal one elon- 
gated, involucre (rarely wanting) and involucels of several lanceo- 
late acuminate usually subscarious bracts, and long-ped uncled um- 
bels of white or pinkish flowers. — Inch P odosciaditim Gray, Proc. 
Am. Acad. vii. 345. 
This genus is remarkably well defined, being readily recognized by 
