Nelson : New Plants from Wyoming 225 



as drawn do not readily separate them. A considerable series of 

 P. montannm, however, show the two species to be wholly distinct. 

 The Wyoming plants when fully mature are seen to be tall slen- 

 der plants, with the leaf-segments parted into long linear lobes. 

 The peduncles are long and naked, the fruits are broader with 

 thinner, conspicuous wings and the oil tubes are on the whole 

 fewer. Their habitats seem to be as wholly different as their aspect. 

 The typical New Mexican P montanus occurs on " Sunny de- 

 clivities at the foot of mountains/' while P. sylvaticus is found in 

 dense, wet or even boggy woods along streams. The young 



Ha 



than of P. montanus. 



The type number is 7667, Tie City, Albany Co., July 20, 

 1900. Collected also on Saw Mill Creek, May 25, 1895, no. 

 1238. It seems probable that no. 217 of the Hall and Harbour 

 collection and Professor Crandall's specimens from the mountains 

 of Larimer Co., Colorado, July 14, 1898, may have to be included. 



Musineon pedunculatum 



Acaulescent or nearly so, glabrous throughout : root deep-set, 

 1-2 dm. long, 10-25 mm. in diameter, cylindrical or fusiform, 

 semi-woody and covered with a thick, rough or warty bark : 

 crown clothed with brown, scarious, nerved, lanceolate bracts : 

 stems few (2-5), borne on a short naked foot 2-4 cm. long, the 

 foot more or less concealed by the scarious bracts of the crown : 

 each stem with 1 or 2 short (1-3 cm.) internodes, simple or 

 branching at the nodes, terminated by a long naked widely divari- 

 cate or prostrate peduncle : leaves thick, somewhat glaucous, 4-8 

 cm. long, longer than the dilated petiole, of broad outline (oblong 

 to ovate), usually ternate, the segments pinnate or even bipinnate, 

 ovate in outline, the ultimate segments broad and short, variously 

 cut or toothed : peduncles rather stout, slightly flexuous, 1 2-20 

 cm. loner, much exceeding the leaves, sometimes twice or thrice 



^j 14AUW* W*\*V,S«V*X»*^ 



as long: umbel 10-20-rayed ; rays 15-25 mm. long; pedicels 

 very short (1-4 mm.) : fruits apparently smooth (not yet mature), 

 4 or 5 mm. long : oil tubes about 3 in the intervals, and 4 on the 

 commissural side : seed slightly flattened dorsally, with plane face. 

 An undoubted Musineon yet more clearly distinct from M. di- 

 varication and M. Hookeri than they are from each other. It may 

 be necessary sometime to slightly modify the fruit characters as 

 given, since no fully mature fruits are at hand. 



