﻿Heller : Plants from Western North America 629 



MACDOUGALIA gen. nov. 



Perennial herbs, the stems from a multicipital caudex, usually 

 simple, covered with floccose tomentum when young : leaves nar- 

 row, mostly basal, neither impressed punctate nor resinous atom- 

 iferous : heads solitary, large, radiate ; involucre hemispherical, its 

 bracts in two rows, all lanceolate, awn-pointed, little shorter than 

 the broad, obtusely conical receptacle, those of the inner series 

 slightly longer and narrower than those of the outer : paleae of the 

 pappus almost as long as the disk flowers, subulate-lanceolate. 



This species, formerly included in the genus called Actinella, 



which has recently been well segregated by Professor Greene, ap- 



pears to me to be worthy of generic rank. In habit it is more like 



the genus Tetraneuris, but has a different involucre, and while its 



involucre is somewhat similar to that of the genus Picradenia, 



there is a wide difference in habit. The following species is the 



only one recognized : 



MacDougalia Bigelovii (A. Gray) 



Actinella Bigelovii A. Gray, PL Wright. 2 : 96. 1853. 



The type was collected by Dr. J. M. Bigelow, in 185 1, "on 

 mountains near the copper mines, and near the Mimbres, New 

 Mexico, April, June." Dr. D. T. MacDougal's no. 2, collected 

 near Flagstaff, Arizona, May 31, 1898, is referred here for the 

 present, although it may prove distinct. 



411 West Walnut Street, Lancaster, Pa. 





