﻿116 Hall: Notes on Baeria and Lasthenia 



early as 1859, when he expressed the opinion that all of Nuttall's 

 species of Ptilomeris were probably forms of one.* 



LASTHENIA 



Lasthenia minima Suksd. was originally described as similar to 

 L. glaberrima DC, but smaller, the peduncles short, and the 

 inflorescence somewhat pubescent. Specimens of the type collec- 

 tion clearly indicate that it is only a dwarf form of the species with 

 which it was compared. Although the peduncles are lightly 

 puberulent, the involucres are nearly or quite glabrous except on 

 the margins, while the floral and fruiting characters are exactly as 

 in L. glaberrima. Specimens are sometimes found which exhibit 

 more or less pubescence on their peduncles and still, because of 

 their robust habit and other characters, are plainly referable to 

 this latter species (e. g., Smsun, May 3, 1892, Brandegee). The 

 margins of the involucre are usually if not always somewhat 

 pubescent. The characters upon which L. minima rests are thus 

 seen to be inconstant and I have therefore reduced it to L. 



University of California 

 * Bot. Mex. Bound. 97. 1859. 



