744 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



5. Senecio chloranthus Greene, Pittonia 4: 118. 1900. 



Type locality: Mountains of southern Colorado, near Pagosa Peak. 



Range: Colorado and northern New Mexico. 



New Mexico: Tunitcha Mountains; Rio Pueblo; Baldy; Santa Fe and Las Vegas 

 mountains. Moist shaded slopes in the mountains, in the Canadian and Hudsonian 

 zones. 



6. Senecio bigelovii A. Gray, U. S. Rep. Expl. Miss. Pacif. 4: 111. 1856. 



Type locality: Mountain arroyos, near Camp Douglas, New Mexico. Type col- 

 lected by Bigelow. 



Range: Mountains of New Mexico. 



New Mexico: Sandia Mountains; White Mountains. Transition and Canadian 

 zones. 



Typically a tall plant, sometimes 1.5 meters high, with many ascending branches, 

 but sometimes low and scarcely at all branched. Mr. Wooton collected the plant 

 in its type locality in the summer of 1910. His specimens seem to have smaller 

 heads than Bigelow's, but those of the latter collection owe their size to the fact that 

 they are in fruit (they must have been collected about the first of October) and that 

 they were pressed very flat. In some of Wooton's specimens the leaves are truncate 

 at the base, but in most of them they are abruptly contracted. 



7. Senecio rusbyi Greene, Bull. Torrey Club 9: 64. 1882. 



Type locality: Mogollon Mountains, New Mexico. Type collected by Rusby 

 (no. 215). 



Range: Mountains of southern New Mexico and Arizona. 



New Mexico: Hillsboro Peak; Mogollon Mountains. Transition and Canadian 

 zones. 



The species is certainly very close to S. bigelovii, and it is questionable whether it 

 might not better be reduced to synonymy. 



8. Senecio parryi A. Gray in Torr. U. S. & Mex. Bound. Bot. 103. 1859. 



Type locality: "In live-oak groves, 150 miles above the mouth of the Pecos, on 

 the Mexican side of the Rio Grande." 



Range: Southwestern New Mexico to southern California and adjacent Mexico. 



New Mexico: Mogollon (Wooton). Mountains, in the Transition Zone. 



A most distinct species, entirely different from all our others by its viscid pubes- 

 cence. 



9. Senecio filifolius Nutt. Trans. Amer. Phil. Soc. n. ser. 7: 414. 1841. 

 Type locality: "The banks of the Missouri, toward the Rocky Mountains." 

 Range: Utah and Colorado to Arizona and western Texas, south into Mexico. 

 New Mexico: Common throughout the State. Plains and low hills, in the Lower 



and Upper Sonoran, rarely in the Transition, zones. 



No plant has a wider distribution in New Mexico than this. It occurs everywhere 

 at low and middle elevations. It is in flower almost every month in the year in the 

 southern part of the State, and is one of the earliest plants to bloom farther north. 

 It is extremely variable in pubescence and in the form of the leaves, and probably 

 when it is studied in a larger series of specimens it will be found to be an aggregate 

 of species. Sometimes almost all the leaves are entire; again even the uppermost 

 are pinnatifid. The plants of the higher elevations are more nearly glabrous than 

 those of the mesas and foothills. On the sandy plains in the southern part of the 

 State the plants are mostly woody at the base and even among the branches. 



10. Senecio spartioides Torr. & Gray, Fl. N. Amer. 2: 438. 1842. 



Type locality: "Upper Platte; on a steep sand bank of the Sweet- water River." 

 Range: Nebraska and Wyoming to Arizona and western Texas. 

 New Mexico: Tunitcha Mountains; Chama; Fruitland; Taos; Ruidoso Creek. 

 Plains and low mountain valleys, in the Upper Sonoran and Transition zones. 



