574 Rydberg : Rocky Mountain flora 



leaflets with lanceolate, acuminate lobes and smaller fruit about 

 4 mm. long. 



CoLORAr30 : Near Morrison, 1889, Greene (type, in mature fruit, 

 in herb. Columbia University) ; Golden, 1892, Crandali {\n flower); 

 Lower Boulder Canon, 1901, Osterhout 2^jj (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—1 3 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, G—y on 

 the commissure ; seed flattened with broadly concave face. 



The specimens has been determined as P. purpurascens 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 38 2 § (type, 

 in flower) and 582^ (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, 

 Cockerell. 



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

 1898, Baker, Earlc cr Tracy 6ig ; West Indian Creek, 1900, 

 Rydberg & Vreeland 5jg8 ; Ironton Park, Underivood & Selby 



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 



