Rydberg : Rocky Mountain flora <'>17 



Colorado: Fort Collins, 1891, Cowen (type); Denver, 1869, 

 B. H. Smith. 



Grindelia aphanactis sp. nov. 



Apparently perennial ; stem 3-4 dm. high, glabrous and stri- 

 ate ; leaves very viscid, oblanceolate, acute, 4-7 cm. long, sharply 

 dentate and sessile, or the lower more or less pinnatifid and peti- 

 oled ; inflorescence corymbiform ; heads about 1 5 mm. broad ; 

 bracts very viscid, subulate ; all very squarrose and the lower re- 

 flexed ; rays none ; awns of the pappus apparently smooth. 



This species has been confused with G. nuda Wood, but that 

 species has broad leaves and large heads and resembles in general 

 habit more the radiate G. squarrosa. G. aphanactis grows in 

 gravelly soil. 



Colorado : Durango, 1898, Baker, Earle & Tracy 526 (type). 



New Mexico: Lincoln, Earle. 



Gutierrezia linearis sp. nov. 



Shrubby and branched ; leaves linear, about 3 cm. long, 1-2 

 mm. wide, puberulent and viscid, punctate ; heads 5-6 mm. high ; 

 involucres campanulate, slightly turbinate at the base ; bracts 

 scarious-margined ; the outer ovate or obovate, the inner elliptic, 

 obtuse ; inflorescence corymbiform ; ray- and disk-flowers each 3-4. 



This species resembles G. longifolia in habit but has the head 

 of G. diversifolia. It grows at an altitude of 1800-2300 m. 



New Mexico : Gray, Lincoln County, 1900, Earle 4.74. (type). 



Colorado: Gunnison, 1901, Baker 821; Red Rock Canon, 

 1896, E. A. Bessey. 



Gutierrezia scoparia sp. nov. 



Woody only at the base ; flowering herbaceous branches nu- 

 merous, about 3 dm. high, puberulent, mostly simple up to the 

 inflorescence ; leaves linear, 3-5 cm. long, 1-2 mm. wide, puberu- 

 lent ; inflorescence corymbiform ; involucre oblong-turbinate, over 

 5 mm. high ; outer bracts lanceolate, inner oblong ; disk- and ray- 

 flowers each about 4. 



This is closely related to G. diversifolia, but has a longer, 

 more turbinate involucre and narrower bracts. It grows at an 

 altitude of 1500-21 00 m. 



Colorado: Manitou, 1901, Clements 16 (type); Boulder, 

 1902, Tweedy 4888. 



