﻿Western North America 201 



perennial root 25-30 cm. high, leafy, branching, floccose-tomen- 

 tose throughout, especially below : leaves light green, thrice, or 

 the upper ones only twice pinnately divided, the divisions all nar- 

 rowly linear, from .5-2 cm. long, barely 1 mm. broad; basal 

 leaves about 10 cm. long, including a petiole of 5 cm., those of 

 the stems sessile, or the lower one petioled, one springing from 

 the base of each branch, and about the length of the internode 

 which it subtends : heads corymbosely cymose, on rather long, 

 stoutish peduncles (2-6 cm. long), 1 cm. high ; flowers bright 

 yellow ; bracts of the involucre obovate -oblong, the margins thin, 

 whitish, the middle part green, more or less covered with floccose 

 tomentum, especially at the base ; corollas 5 mm. long, the tube 

 occupying nearly half the length, the throat cylindrical rather than 

 campanulate, the triangular-lanceolate lobes little more than one- 

 fourth the length of the throat ; akenes villous with rather long 

 hairs ; palae of the pappus oblong, or slightly contracted below, a 

 little longer than the corolla-tube. 



The type is no. 3542, collected near Espafiola, Santa Fe 

 County, New Mexico, May 17, 1897, at an elevation of 5600 feet. 

 The specimens were growing on the right bank of the Rio 

 Grande, about three miles below Espafiola, in almost pure sand. 

 Later, more of them were noticed on the sand hills at the point 

 where the railroad turns away from the river. It falls into the 

 same group to which H. flavescens belongs, but is evidently differ- 

 ent. It apparently grows only at elevations under 6000 feet, and 

 at no place was it seen growing in company with H. luteus Nutt., 

 which is a perfectly valid species, not at all like any of the so- 

 called forms of H. filifolius. H. luteus is common on the hills 

 about Santa Fe, growing at an elevation of 7000 feet and more. 



University of Minnesota, Minneapolis, Minn. 



