574 Rydberg : Rocky Mountain flora 



leaflets with lanceolate, acuminate lobes and smaller fruit about 

 4 mm. long. 



Colorado : Near Morrison, 1889, Greene (type, in mature fruit, 

 in herb. Columbia University) ; Golden, 1892, Crandall (in flower) ; 

 Lower Boulder Canon, 1901, Osterhout 24.33 (in young fruit). 



Phellopterus camporum sp. nov. 



Perennial with a deep-seated thick tap-root ; leaves twice to 

 thrice pinnatifid, petioled, pale-green ; petioles 4-7 cm. long ; ulti- 

 mate divisions oblong, obtusish, 3—6 mm. long ; peduncles 5—20 

 cm. long, usually exceeding the leaves ; involucres of white hya- 

 line bracts ; branches of umbel about 2 cm. long in fruit; bractlets 

 orbicular, 5-7 mm. long, with greenish center and broad white 

 hyaline border, 7—13 nerved ; pedicels short, in fruit only 3—5 mm. 

 long; flowers white; fruit with the very broad wings 10-13 mm. 

 long and 9-1 1 mm. wide ; oil-tubes 3-4 in the intervals, 6-7 on 

 the commissure ; seed flattened with broadly concave face. 



The specimens has been determined as P. purpnrascens East- 

 woodiae, but it is evidently well distinct from that as shown by a 

 duplicate of the type in the herbarium of the N. Y. Botanical 

 Garden ; the bractlets are larger and many-nerved, the flowers 

 white and the fruit is longer than in the variety mentioned. It 

 grows on dry mesas at an altitude of 1,500-16,00 m. 



Colorado: Pueblo, 1900, Rydberg & Vreeland 5825 (type, 

 in flower) and 3824 (in fruit). 



Pseudocymopterus montanus mutifidus var. nov. 



Low, about 2 dm. high ; lower leaflets broadly rhombic in out- 

 line, thrice pinnate ; the upper twice pinnate ; ultimate divisions 

 linear ; fruit smaller and more rounded. 



On high mountains, at an altitude of 2,700-3,600 m. 



New Mexico : Range between Sapello and Pecos rivers, 1900, 

 Cocker ell. 



Colorado: Ironton, 1899, C. C. Curtis; Cumberland Basin, 

 1898, Baker, Earle & Tracy 6ig ; West Indian Creek, 1900, 

 Rydberg & Vrccland 3798 ; Ironton Park, Undcnvood & Sclby 



358. 



Pseudocymopterus aletifolius sp. nov. 



Densely cespitose acaulescent glabrous perennial with a very 

 thick root and short caudex, covered by the broad striate bases of 



