138 



Whether Astragalus Brazoensis should be included in Hes- 

 per astragalus^ I do not know, not at present having material 

 for comparison. The three species which are known to me may 

 be distinguished as follows: 

 Pods erect 

 Slightly longer than the black-hirsute calyx H. didymocarpus 



Not exceeding the white-villous calyx H. dispermus 



Pods deflexed, much longer than the calyx H. Gambellianus 



Acrolasia parviflora 



Mentzelia parviflora Heller, Bull. Torr. Club, 35: 199. 

 1898. 



This species seems to have escaped a change of name when 

 Dr. Rydberg transferred the Meittzelia names which belong to 

 this genus. I can find no reference to the use of Bartonia par- 

 viflora Douglas, which could invalidate the present name. 



Professor Greene has recently pointed out (Leaflets, 1: 168), 

 that the type of the genus Moiiardella is a plant of the eastern 

 side of the continent, not congeneric with our western plants 

 which have been called Monardella^ and therefore very properly 

 assigns to them a new name, calling them Madronella. The 

 writer has recently published several species in this genus, and 

 will now transfer them to their proper name. 

 Madronella involucrata 



Monardella involucrata Heller, Muhlenbergia, 1: 34. 1904, 



Madronella mollis 



Monardella mollis Heller, Muhlenbergia, 1: 35. 1904. 



Madronella coriacea 



Monardella coriacea Heller, Muhlenbergia, 1: 35. 1904. 



Madronella pallida 



Monardella pallida Heller, Muhlenbergia, 1: 36. 1904. 



Madronella pinetoruni 



Monardella pinetor urn Heller, Muhlenbergia, 1: 36. 1904. 



