RVDBERG : ROCKV MOUNTAIN FLORA 575 



dead leaves ; leaves once or twice pinnate, dark green, glabrous, 

 stiff and shining, 1-2 dm. long; petioles about equaling the 

 blades, striate ; leaf-segments obovate to rhombic-cuneate, deeply 

 cleft; lobes usually 3 -toothed with lanceolate acuminate teeth; 

 scapes 1 — 1.5 dm. long; involucres lacking; branches of the 

 umbel very unequal, in fruit I— 5 cm. long; bractlets linear-sub- 

 ulate, 4-5 mm. long ; pedicels also very unequal, in fruit 1—8 mm. 

 long ; sepals conspicuous, in fruit 1—2 mm. long ; flowers yellow ; 

 fruit 5-6 mm. long, 2.5-3 mm - wide; lateral wings evident but 

 rather narrow ; dorsal ribs acute or slightly winged ; seed flat- 

 tened and with somewhat concave face ; oil-tubes usually solitary 

 in the intervals. 



This species is evidently most closely related to P. anisatus, 

 but easily distinguished by the very unequal branches of the 

 umbel, the longer, usually less winged fruit and especially by the 

 leaves, which (although much firmer) resemble closely those of 

 Aletcs acaulis. The plant evidently connects the two genera 

 Aletcs and Pseudocymopterus. The fruit of the present species is 

 also intermediate between A. acaulis and P. anisatus, and were it 

 not for the flatness of the seed and the lateral wings of the fruit, it 

 might have been referred to Aletcs. It grows in the mountains of 

 which Pike's Peak is the center, at an altitude of 2,000-2,600 m. 



Colorado: Minnehaha, 1901, Clements 07 (type); same local- 

 ity, 1895, E. A. Bessey ; North Cheyenne Canon, 1895, E. A. 

 Bessey, 2s\<\ 1892, C. S. Sheldon; South Cheyenne Canon, 1900, 

 Rydberg& Vrceland 5815 ; Cheyenne Mountain, \8g2, Alice East- 

 wood ; Manitou, 1900, Clements; Ruxton, 1896, Clements 211 ; 

 Halfway House, 1896, Shear j 700 (Rydberg & Vreeland's speci- 

 mens are in flower, the others in fruit). 



