PLANTS FROM SOUTHEASTERN UTAH. 297 



48. Erigeron sparsifolius n. sp. 



About 6 dm. high, 3 or 4 erect stems from a woody tap- 

 root, probably perennial, the new growth springing from the 

 buds below, on the stems of the previous year ; canescent 

 when young, later becoming greener as the short white 

 appressed hairs become more scattered; radical leaves dry- 

 ing early, lowest stem leaves 5 cm. long, oblanceolate, 

 tapering to the margined petiole, which broadens to a per- 

 sistent spoon-shaped base; leaves diminishing upwards, 

 narrowly linear above, inclined to twist; heads few, 

 cymose, 5 mm. high; bracts of the involucre in 3 series, 

 loosely appressed, lanceolate, acuminate, outer short 

 bracts white -hairy; inner glandular, ribbed; rays about 

 16, light blue, 5 mm. long, 1 mm. wide, acute or slightly 

 toothed at the apex; disk flowers numerous; tubular 

 corolla slightly hairy, yellow, becoming ochroleucous, 

 5-toothed, with thick margins; pappus of ray and disk 

 compound, scabrous, inner fragile, equaling the corolla; 

 akenes 4-angled, slightly hairy; receptacle convex. 



This Erigeron was collected at the head of Willow 

 Creek, July 14, 1895. It is nearest to Erigeron Parishii 

 and E. Utahensis, but has much smaller heads than either 

 and a different habit of growth. 



Type in the Herbarium of the California Academy of 

 Sciences. 



49. Another form was collected with more numerous 

 and more slender stems, fewer and smaller heads, and 

 outer pappus less evident. The difference is probably 

 due to a less favorable situation. This form was seen 

 between McElmo Creek and the San Juan River, on a dry 

 hillside, and was collected in a dry wash near the head of 

 Willow Creek. 



Pboc. Cal. Acad. Sol, 2d Ser., Vol. VI. ( 22 ) August 3, 1896. 



