Ill 



with winged rhachis; segments 8 to a-f.oolhcd : pedimeles 2 to 5 

 inches long: umbel 10 to 'io-raycd; rays 3 to 9 lines long; pedicels 

 short: fruit smooth or nearly so, about two lines long: oil-tubes 8 

 in the intervals, with accessory ones beneath the ribs, 4 on the 

 commissural side: seed terete, with rather deeply concave face. 

 (Fig. 121.) — Scseii divaricatum Pursh, 782; DC. Prodr. i\-. 14(). 



From the plains of the Upper Missouri to Oregon, and extending into 

 N. W. British America. Fl. May and June. 



2. M. trachyspermum Nutt. 1. c. Like the last, but more 

 or less scabrous throughout: fruit scabrous, smaller, 1 to 1 ^ 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 concavit}'. (Fig. 122.)— J/. 

 divaricatiim Nutt. \ ar. Hookcri 'I'orr. <S: Gray, 1. c. M. angusti- 

 folium Nutt. 1. c. 



Colorado (Hall a- Horbour 2H} to Montana {Wiilson, Caiibji) and 

 plains of British America. Fl. May and June. 



8. M. (?) tenuifolium Nutt. 1. c. Acaulescent, somewhat 

 cespitose, glaucous: leaves tripinnatifid with narrowly linear seg- 

 ments: Howers said to be white: peduncles much longer than the 

 leaves; umbel 12 to 20-raycd: fruit nearly glabrous, with ribs 

 nearly obsolete: oil-tubes large, 2 or 8 in the intervals. 



"Rocky Mountains" (Xultalh. 



The type specimens of tliis very uncertain species liave been examined 

 at Cambridge, Philadielphia. and New York, but the fruit is so very im- 

 mature that the relationship cannot be determined. Very liliely it is not a 

 3/M.se/i('t(m at all. In general appearance it resembles Ihtihourin more 

 than anything else. 



87. EULOPIIUS Xutl. in DC. Prodr. iv. 248.— Glabrous 

 perennials from deep-seated fascicled tubers, 1 to o feet high, with 

 pinnately or ternately compound leaves, narroul}- linear to oblong- 

 linear mostly entire leaflets (or segments), the terminal one elon- 

 gated, involucre (rarely wanting) and inxolucels of several lanceo- 

 late acuminate usually subscarious bracts, and long-peduncled um- 

 bels of white or pinkish flowers. Tncl. Podosc'iaJ'runi (irav, Proc. 

 Am. Acad. vii. 845. 



This genus is rema)-i<ably Wfll (l.'fineii, biwng readily recognized by 



