Plantae Andrewseae. 179 



panding below to a somewhat sheathing base ; stem leaves 3-5 cm. long, 

 sessile and, like the root-leaves, elliptic and mostly obtuse ; the uppermost 

 ovate, acute ; heads few, the rays very numerous (more than 100) long and 

 very narrow ; the involucre and peduncles brownish-purple, glabrous but 

 under a lens seen to be covered with a close beady glandulosity. 



This may be specifically distinct but the distinguishing characters are 

 not readily stated. Its aspect is such as would not at once suggest E. 

 macranthus. Its two or three large handsome heads, the relatively short 

 and few coriaceous leaves and the dark peduncles and involucres with 

 their glistening beady surface (under a good lens) suggests to one a plant 

 as strange as it is handsome. 



Secured on a partially shaded mountain slope, Boulder County, by Mr. 

 Andrews, 1901. 



Aster andrewsii sp. nov. 



Forming patches or colonies of considerable extent by means of the 

 creeping underground rootstocks ; stems nearly erect, rather slender, nearly 

 or quite simple, minutely granular-glandular, becoming glandular or viscid- 

 pubescent above, brownish and more or less tinged with purple, expecially 

 above, 2-4 dm. high ; leaves rather numerous, broadly linear, acute at apex 

 and slightly tapered at both ends, 3-5 dm. long, about 5 mm. broad, the 

 uppermost somewhat reduced, indistinctly 3-nerved, ciliate on the margins, 

 both faces sprinkled with minute nearly sessile glands ; heads usually sol 

 itary-terminal, occasionally one or two greatly reduced and possibly always 

 aborted heads appear in the uppermost axils ; involucre low-hemispherical, 

 about 15 mm. broad, half as high ; bracts in about 3 only moderately un 

 equal rows, linear-lanceolate, somewhat acuminate, the glandulosity like 

 that of the stem ; rays 20-30, a beautiful dark azure blue, linear-oblong, 

 about 15 mm. long and 2 mm. wide ; pappus a sordid white, the short 

 akenes pubescent. 



No closely allied species is known to the writer. The type by Mr. 

 Andrews is from an open valley at about 9,500 ft. altitude, near Eldora, 

 Boulder County. 



