33 



LTJINA 



hypoleuca, Benth. 



LYGODESMIA 



juncea. Don. 

 rostrata, Gray. 



MADIA 



filipes, Gray, 

 glomerata, Hook. 

 Nuttallii, Gray, 

 sativa, Molina. 



var. racemosa, Gray. 



(M. dissitiflora, T. & G.) 



MATRICARIA 



discoidea, DC. 

 inodora, L. 



var. nana, Hook. 



MICROSERIS 



Bigelovii, Gray, 

 nutans. Gray. 



MIKANIA 



scandens, Gray. 



ONOPORDON 



acanthiwrn,, L. 



PETASITES 



frigida, Fries, 

 palmata, Gray, 

 sagittata, Gray. 



PICRIS 



echinoides, L. 



hieracioides, L., var. Japonica, 

 Regel. 



POLYMNIA 



Canadensis, L. 



PRENANTHES 



alata, Gray. 



var. sagittata, Gray, 

 alba, L. 

 altissima, L. 

 racemosa. Michx. 

 serpentaria, Pursh. 



var. nana, Gray. 



PSILOCARPHUS 



elatior, Gray, 

 tenellus, Nutt. 



RUDBECKIA 



hirta, L. 

 laciniata, L, 



SAUSSUREA 



alpina, DC. 



var. Ledebouri, Gray. 



SENECIO 



amplectens, Gray, 

 aureus, L. 



var. Balsamitffl, T. & G. 



var. borealis, T. & G. 



var. compactus, Gray. 



var. croceus, Gray. 



var. discoideus, Hook. 



var. lanceolatus, Oaks. 



var. obovatus, T. & G. 



var. subnudus, Gray, 

 canus, Hook, 

 eremophilus, Richards, 

 fastigiatus, Nutt. 

 Frernonti, T. & G. 

 frigidus, Less, 

 Hookeri, T. & G. 

 hydrophilus, Nutt. 

 integerrimus, Nutt. 

 Jacobcea, Linn. 

 lugens, Richards. 



var. exaltatus, Gray. 



var. f'oliosus, Gray. 



