112 NORTH AMERICAN FLORA [Volume 34 



3. Hymenoxys pumila (Greene) Rydb. Bull. Torrey Club 33: 156. 



1906. 



Picradenia pumila Greene, Pittonia 3: 271. 1898. 



Hymenoxys Richardsoni pumila Cockerell, Bull. Torrey Club 31: 472. 1904. 



A cespitose perennial, with a short caudex covered with hairy-tufted leaf-bases; stems 1 



dm. high or less, sparingly puberulent or glabrate; leaves 2-5 cm. long, ternately divided into 



linear-filiform divisions or simple, glabrate and conspicuously punctate; heads solitary or 



rarely 2 or 3 on each stem; peduncles 1-2 cm. long; involucre 5 mm. high, 8-10 mm. broad; 



outer bracts 8-10, united for about one third their length; free portion lanceolate, rounded on 



the back; ligules 5-8 mm. long, 2-4 mm. wide; disk-corollas fully 3 mm. long, glandular- 



puberulent; tube nearly 1 mm. long; achenes nearly 3 mm. long; squamellae 2 mm. long, 



lanceolate, attenuate. 



Type locality: Rock Creek, Wyoming. 

 Distribution: Wyoming, Colorado, and Utah. 



4. Hymenoxys Macounii (Cockerell) Rydb. Bull. Torrey Club 37: 



447. 1910. 



Hymenoxys Richardsoni pumila Macounii Cockerell, Bull. Torrey Club 31: 464, 474. 1904. 



A cespitose perennial, resembling the next preceding species in habit; stems 1 dm. or less 

 high, puberulent or slightly villous; leaves 3-5 cm. long, divided into 3 linear-filiform divisions, 

 conspicuously punctate; involucre 6 mm. high, 8-10 mm. broad, acute at the base; outer bracts 

 8-10, united about one third their length, decidedly acutely carinate on the back, the midvein 

 prominent up to the very tip; free portion lanceolate, acute; inner bracts elliptic, abruptly 

 acuminate, slightly erose on the margins; ligules golden-yellow, about 8 mm. long; disk-corollas 

 nearly 4 mm. long, glandular-puberulent; achenes 3 mm. long; squamellae about 2.5 mm. long, 

 lanceolate, attenuate into an awn-tip. 



Type locality: Wood Mountain, Saskatchewan. 

 Distribution: Saskatchewan and Montana. 



5. Hymenoxys floribunda (A. Gray) Cockerell, Bull. Torrey Club 



31: 485. 1914. 



Actinella Richardsoni floribunda A. Gray, Mem. Am. Acad. II. 4: 101. 1849. 

 P 'tile pida floribunda A. Heller, Plant World 1: 22. 1897. 

 Picradenia floribunda Greene, Pittonia 3: 272. 1898. 



Picradenia floribunda utilis Cockerell, Bull. Colo. Coll. Mus. 1: 1. 1903. 

 Picradenia intermedia A. Heller, Bull. Torrey Club 31: 491. 1904. 

 Hymenoxys floribunda utilis Cockerell, Bull. Torrey Club 31: 486. 1904. 

 Hytnenoxys floribunda arizonica Cockerell, Bull. Torrey Club 31: 488. 1904. 

 Hymenoxys floribunda intermedia Cockerell, Bull. Torrey Club 31: 492. 1904. 



A cespitose perennial, with a woody caudex, usually densely hairy on the basal leaf- 

 bases; stems about 2-3 dm. high, angled and striate, slightly pubescent and glandular-granu- 

 liferous; leaves very numerous, 5-10 cm. long, glabrate, strongly punctate, divided into 1-5 

 narrowly linear divisions; heads numerous, in flat-topped corymbs; involucre rather turbinate, 

 5 mm. high, 6-8 mm. broad; outer bracts carinate, united up to the middle or nearly so, 

 the free portions ovate, acute; inner bracts oval, erose on the margins, mucronate; ligules 7-10 

 mm. long, 2-4 mm. wide; disk-corollas 3.5 mm. long, glandular-puberulent; tube about 1 mm. 

 long; achenes 2.5-3 mm. long, densely hirsute; squamellae 2 mm. long, lanceolate or ovate, 

 acuminate, aristate-pointed. 



Type locality: Santa Fe, New Mexico. 



Distribution: Wyoming and Utah to New Mexico and Arizona. 



Illustration: Bull. Torrey Club 31: pi. 20. 



6. Hymenoxys Earlei Cockerell, Bull. Torrey Club 31: 492. 1904. 



Picradenia Earlei Cockerell, Bull. Colo. Coll. Mus. 1:1. 1903. 



A cespitose perennial, with a short caudex, and with villous basal leaf-bases; stems several, 

 leafy, 2-3 dm. high, puberulent and glandular-granuliferous, striate; leaves 5-8 mm. long, 

 glabrate and punctate, dissected into 3-7 linear segments occasionally 2 mm. wide; heads 



