136 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Stems taller, 1.5 to 5 meters high; perianth segments 
elliptic, 2 to 4. cm. long; fruit smaller, 10 cm. long 
or less, only slightly pulpy. 
Leaves rigid, rough, yellowish green; filaments 
coarse and grayish.......................2--- 7. Y¥. macrocarpa. 
Leaves floxible, smooth, bluish green, glaucous; 
filaments, when present, fine, usually 
brownish. ..........-.2--22222.22020002 eee 8. Y. schottii. 
1. Yucca elata Engelm. Bot. Gaz. 7: 17. 1882. PALMILLA. 
Yucca angustifolia radiosa Engelm. in King, Geol. Expl. 40th Par. 5: 496. 1871. 
Yucca angustifolia elata Engelm. Trans. Acad. St. Louis 8: 50, 1873. 
Yucca radiosa Trel. Rep. Mo. Bot. Gard. 3: 163. 1892. 
Tyre Loca.ity: ‘‘Extending from West Texas to Utah, Arizona and Northern . 
Mexico.” 
RanGeE: Southern Arizona to western Texas, southward into Mexico, 
New Mexico: Fort Bayard; Mimbres River; Dog Spring; Cambray; Hachita; 
Deming; mesa west of Organ Mountains; White Sands; Alamogordo; Mescalero Agency; 
Mesquite Lake. Mesas, in the Lower Sonoran Zone. 
This is the common narrow-leaved Yucca of southern New Mexico, known as “‘ pal- 
milla,” or ‘‘ soapweed.’’ The roots, termed ‘‘amole,”’ are often used as a substitute for 
soap. The plant has considerable decorative value, but because of its large roots is 
difficult to transplant. It is one of the most abundant and characteristic plants of 
the Lower Sonoran Zone. 
2. Yucea baileyi Woot. & Standl. Contr. U. 8S. Nat. Herb. 16: 114. 1913. 
TyPE LocaLity: Dry slope in pine woods in the Tunitcha Mountains, New Mexico. 
Type collected by Standley (no. 7638). 
Rance: Northwestern New Mexico and northeastern Arizona. 
New Mexico: Tunitcha Mountains; Carrizo Mountains; Chusca Mountains. Dry 
hills and low mountains, in the Transition Zone, extending down into the Upper 
Sonoran. 
3. Yucca glauca Nutt. Fraser’s Cat. no. 89. 1813. SOAPWEED, 
Yucca angustifolia Pursh, Fl. Amer. Sept. 227. 1814. ~ 
Type Locauity: “Collected 1,600 miles up the Missouri, about lat. 49°.” 
Rance: South Dakota and Wyoming to Missouri and New Mexico. 
New Mexico: Raton; Farmington; Sierra Grande; Rosa; Albuquerque; Fairview; 
San Augustine Plains; Horse Camp; Pecos. Plains and low hills, chiefly in the Upper 
Sonoran Zone. 
This is the common Yucca of the northern and eastern parts of New Mexico, where 
it is often very abundant. The leaves have been used in the manufacture of stable 
brooms. The fruits of this, as well as of some of the other dry-fruited species, were 
cooked and eaten by some of the Indians. 
4. Yucca neomexicana Woot. & Standl. Contr. U. S. Nat. Herb. 16: 115. 1913. 
TYPE LOCALITY: On a volcanic hill about half a mile north of Des Moines, Union 
County, New Mexico. Type collected by Standley (no. 6208). 
RanGeE: Known only from type locality, in the Upper Sonoran Zone. 
5. Yucca harrimaniae Trel. Rep. Mo. Bot. Gard. 18: 59. pl. 28, 29, 83. f. 10. 1902. 
TypE LocaLiry: Helper, Utah. 
Rance: Southern Utah and Colorado to northeastern Arizona and northwestern 
New Mexico. 
New Mexico: Carrizo Mountains (Standley 7314). Dry hills, in the Upper Sonoran 
Zone. 
