482 CONTRIBUTIOlSrS FEOM THE NATIONAL HEEBAEIUM. 



1. Aulospermuin purpureum (S. Wats.) Coult. & Rose, Contr. U. S. Nat. Herb. 

 7: 178. 1900. 

 Cymoptenis purpureus S. Wats. Amer. Nat. 7: 300. 1873. 

 Type locality: New Mexico. Type collected by Palmer. 

 Range: Colorado and Utah to New Mexico and Arizona. 

 New Mexico: Aztec; Fort Wingate; Stinking Lake. Upper Sonoran Zone. 



16. CYMOPTERUS Raf. 



Low (5 to 10 cm.) glabrous perennials from thick elongated roots; leaves usually 

 exceeding the peduncles, twice or thrice pinnate, the leaflets oblong, incised; umbels 

 with few unequal rays; flowers yellow; involucels conspicuous, exceeding the flow- 

 ers; fruit oblong; carpels each with 3 or 4 wings, these thin at the margin and near 

 the body; oil tubes several in the intervals, 4 to 8 on the commissural side. 



1. Cymopterus fendleri A. Gray, Mem. Amer. Acad. n. ser. 4: 56. 1849. 



Type locality: Gravelly hills, Santa Fe, New Mexico. Type collected by Fend- 

 ler (no. 274). 



Range : New Mexico to Colorado. 



New Mexico: Santa Fe; Sandia Mountains. Upper Sonoran Zone. 



17. PSETJDOCYMOPTERUS Coult. & Rose. 



Caulescent or almost acaulescent perennials, 30 or 40 cm. high or less, from per- 

 ennial roots, with bipinnate leaves, mostly no involucre, and yellow or purple flowers 

 in usually small or medium-sized umbels; calyx teeth evident; fruit oblong, glabrous; 

 carpels with very prominent and acute (sometimes narrowly winged) dorsal and 

 intermediate ribs and broad thickish lateral wings; oil tubes 1 to 4 in the intervals, 

 2 to 8 on the commissural side. 



KEY TO THE SPECIES. 



Flowers jjurple 1. P. purpureus. 



Flowers yellow. 



Ultimate divisions of the leaves short, ovate or lanceolate ; plants 



tall, stems usually solitary 2. P. montanus. 



Ultimate divisions of the leaves linear or nearly so; plants tall 

 or low; stems solitary or cespitose. 

 Divisions of the leaves 18 to 60 mm. long, few; leaves twice 



compound; flowers pale yellow 3. P. tenui/olius. 



Divisions of the leaves short, usually less than 15 mm. long, 

 very numerous, crowded; leaves mostly thrice com- 

 pound; flowers bright yellow. 

 Basal leaves long, 20 to 25 cm., very numerous; seg- 

 ments usually sessile, with a pair of lobes at 



the base; umbels 15 mm. wide or less 4. P. Jilicinus. 



Basal leaves short, usually less than 15 cm. long, few; 

 segments long-petioled ; umbels usually more 

 than 20 mm. broad 5. P. multifidus. 



1. Pseudocymopterus purpureus (Coult. & Rose) Rydb. Bull. Torrey Club 33: 

 147. 1906. 



Pseudocymopterus montanus purpureus Coult. & Rose, Rev. Umbell. 75. 1888. 



Type locality: Fort Humphreys, Arizona. 



Range: Utah to Arizona and New Mexico. 



New Mexico: Burro Mountains; Bullards Peak; Mogollon Peak; Organ Mountains. 

 Meadows and on cliffs, in the Transition Zone. 



