648 Rydberg : Rocry Mountain flora 



Chrysopsis caudata sp. nov. 



Perennial, with a thick tap-root and a very short, erect and 

 much-branched caudex ; stems many, erect, purplish, hirsute with 

 long white hairs ; lower leaves oblanceolate, tapering into a short 

 petiole, silky-strigose on both sides, 3-5 cm. long ; middle leaves 

 similar but sessile, uppermost elliptic or oblong ; heads congested 

 in small clusters at the end of the branches and subtended by the 

 uppermost leaves ; bracts linear-lanceolate, hirsute, the innermost 

 with a subulate usually brownish and spreading tip ; disk about 1 5 

 mm. wide ; rays bright yellow, about 12 mm. long and 3 mm. wide. 



This species is closely related to C. villosa, but differs in the 

 sessile heads subtended by oblong leaves and in the subulate tips 

 of the involucral bracts. It grows on hills at an altitude of I 500- 



2950 m. 



Colorado: Ruxton Dell, 1901, Clements 143 (type); near 



Boulder, 1902, Tweedy 489'?. 



Chrysopsis amplifolia sp. nov. 



Perennial, with a tap-root, rather simple ; stem 3-5 dm. high, 

 often branched, pubescent and sparingly hirsute ; lower leaves 

 spatulate, strigose, obtuse or slightly mucronate, middle and upper 

 leaves broadly oblong or elliptic ; the upper cordate or truncate at 

 the base, 3-4 cm. long, 12-15 mm. wide; inflorescence corymbi- 

 form ; heads usually subtended by oblong leaves ; bracts hirsute- 

 strigo'se, linear-lanceolate, acute ; disk 1 5 mm. or more wide ; 

 rays golden yellow, about 12 mm. long and 2.5 mm. wide; 

 achenes densely strigose-canescent. 



This is also closely related to C. villosa, but distinguished by the 

 ample upper stem-leaves with subcordate or truncate bases and 

 the laree sessile heads. It grows on plains and foothills at an 

 altitude of about 1500 m. 



Colorado: Longmont, 1902, Tweedy 48 g8 (type); Ward, 

 1 90 1, Osterhout 2444. 



Chrysopsis horrida sp. nov. 

 Perennial with a tap-root, more or less cespitose ; stems about 

 2-3 dm. high, hirsutulous and hispid, more or less branched, 

 especially above ; leaves obovate, broadly oblanceolate or oblong, 

 subsessile, except the lower, densely hirsute with short hairs and 

 slightly gl'andular-puberulent ; heads corymbose, peduncled, about 

 8 mm. high ; disk 1 cm. or less wide ; rays about 8 mm. long and 

 ' 1-1.5 mm. wide; achenes 2 mm. long, canescent ; pappus about 

 5 mm. long, yellowish. 



