690 CONTRIBUTIONS FKOM THE NATIONAL HEEBAEIUM. 



14. Machaeranthera aquifolia Greene, Conlr. U. S. Nat. Herb. 16: 188. 1913. 



Type locality: Gila Hot Springs, Mogollon Mountains, Socorro County, New 

 Mexico. Type collected by Metcalfe (no. 856). 



Range : Mountains of southern New Mexico and Arizona. 



New Mexico: Gila Hot Springs; Magdalena Mountains; Grand Canyon of the Gila; 

 Mangas Springs; East Canyon; Gilmores Ranch. Upper Sonoran and Transition zones. 



The specimens from the Magdalena Mountains are stouter and have more heads than 

 the typical form. 



40. LEXJCELENE Greene. 



Slender perennials with diffusely branched, ascending or prostrate stems and linear- 

 subulate to spatulate, strigose or hispid-ciliate leaves; heads small, terminal, with 

 white or pink rays; involucres campanulate, of narrow, mucli imbricated bracts with 

 scarious margins; achenes slender^ compressed, hirsutulous; pappus a single series of 

 scabrous bristles. 



KEY TO THE SPECIES. 



Upperleavesstrigose, sparingly if at all glandular; not hispid-ciliate.. 1. L. arenosa. 

 Upper leaves strongly glandular, conspicuously hispid-ciliate 2. L. ericoides. 



Other species have been reported from New Mexico, but our material seems to 

 show only two forms. Leucelene arenosa may be only the later stage of the vernal 

 L. ericoides. 



1. Leucelene arenosa Heller, Cat. N. Amer. PI. 8. 1898. 

 Aster ericaefolius tenuis A. Gray, Syn. Fl. 1^: 198. 1884. 

 Type locality: "New Mexico." 



Range; Colorado to western Texas and Arizona and southward. 



New Mexico: Horse Camp; Tunitcha Mountains; Carrizo Mountains; Shiprock; 

 Zuni; Dulce; Sierra Grande; Santa Fe; Raton; Pecos; Willard; Albuquerque; Water 

 Canyon; Las Vegas; Jarilla; Mogollon Mountains; San Luis Mountains; Hanover 

 Mountain; Organ Mountains; White Mountains; Gray; Torrance. Dry hills, in the 

 Lower and Upper Sonoran zones. 



2. Leucelene ericoides (Torr.) Greene, Pittonia 3: 148. 1896. 

 Inula f ericoides Torr. Ann. Lye. N. Y. 2: 212. 1828. 



Diplopappus ericoides hirteUa A. Gray, Mem. Amer. Acad. n. ser. 4: 69. 1849. 



Leucelene hirtella Rydb. Colo. Agr. Exp. Sta. Bull. 100: .358. 1906. 



Type locality: "On the Canadian?," Colorado or New Mexico. 



Range: Colorado to Arizona and New Mexico. 



New Mexico: Las Vegas; Farmington; Tierra Amarilla; Laguna Colorado; Santa 

 Fe; Nara Visa; Santa Rita; Mangas Springs; San Augustine Plains; Carrizalillo Moun- 

 tains; Organ Mountains; Roswell; Gray; mountains west of San Antonio; Aden. Open 

 slopes, in the Lower and Upper Sonoran zones. 



The type of Diplopappus ericoides hirtella was collected near Santa Fe (Fendler 348). 



41. PSILACTIS A. Gray. 



Tall, sparingly branched annual, glandular-puberulent, with narrow, often pinnatifid 

 leaves and small heads terminating the branches; involucre hemispheric, the bracts 

 imbricated in 2 or 3 series; rays purple; achenes pubescent; pappus none in the ray 

 flowers, a single series of capillaiy bristles in the disk flowers. 



1. Psilactis asteroides A. Gray, Mem. Amer. Acad. n. ser. 4: 72. 1849. 

 Type locality: "Llanos, in the Sierra Madre, west of Chihuahua," Mexico. 

 Range: Western Texas and southern Arizona to northern Mexico. 

 New Mexico : Mesilla Valley. Valleys, in the Lower Sonoran Zone. 



