690 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
14. Machaeranthera aquifolia Greene, Contr. U.S. Nat. Herb. 16: 188. 1913. 
Tyre tocauity: Gila Hot Springs, Mogollon Mountains, Socorro County, New 
Mexico. Type collected by Metcalfe (no. 856). 
Rane@e: 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. LEUCELENE 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, much imbricated bracts with 
scarious margins; achenes slender, compressed, hirsutulous; pappus a single series of 
scabrous bristles. 
KEY TO THE SPECIES. 
Upper leaves strigose, 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. Pl. 8. 1898. 
Aster ericaefolius tenuis A. Gray, Syn. Fl. 17: 198. 1884, 
Tyre Locauity: ‘‘New Mexico.” 
Rance: 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 ? ericoides Torr. Ann, Lyc. N. Y. 2: 212. 1828. 
Diplopappus ericoides hirtella A, Gray, Mem. Amer. Acad. n. ser. 4: 69, 1849, 
Leucelene hirtella Rydb. Colo, Agr. Exp. Sta. Bull, 100: 358. 1906. 
Type LocaAtity: ‘‘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; achencs pubescent; pappus none in the ray 
flowers, a single series of capillary bristles in the disk flowers, 
1. Psilactis asteroides A. Gray, Mem. Amer. Acad. n. ser. 4:72. 1849, 
Type Locauity: “Llanos, in the Sierra Madre, west of Chihuahua,’’ Mexico, 
Rance: Western Texas and southern Arizona to northern Mexico, 
New Mexico: Mesilla Valley. Valleys, in the Lower Sonoran Zone, 
