136 CONTEIBUTIONS FEOM THE NATIONAL HEEBAEIUM. 



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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 7. Y. macrocarpa. 



Leaves floxible, smooth, bluish green, glaucous; 

 filaments, when present, fine, usually 

 brownish 8. Y. schottii. 



1. Yucca elata Engehn. 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 3: 50. 1873. 



Yucca radiosa Trel. Rep. Mo. Bot. Gard. 3: 163. 1892. 



Type locality: "Extending from West Texas to Utah, Arizona and Northern 

 Mexico." 



Range: Southern Arizona to western Texas, southward into Mexico. 



New Mexico: Fort Bayard; Mimbres River; Dog Spring; Cambray; Hachita; 

 Doming; mesa west of Organ Mountains; ^^Tiite 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. Yucca baileyi Woot. & Standi. Contr. U. S. Nat. Herb. 16: 114. 1913. 



Type locality: Dry slope in pine woods in the Tunitcha Mountains, New Mexico. 

 Type collected by Standley (no. 7638). . 



Range: 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. Eraser's Cat. no. 89. 1813. Soapweed. 

 Yucca angustifolia Pursh, El. Amer. Sept. 227. 1814. 



Type locality: "Collected 1,600 miles up the Missouri, about lat. 49°." 



Range: 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. & Standi. 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). 

 Range: KnowTi only from type locality, in the L^pper Sonoran Zone. 



5. Yucca harrimaniae Trel. Rep. Mo. Bot. Gard. 13: 59. pi. 28, 29, 83. f. 10. 1902. 

 Type locality: Helper, Utah. 



Range: Southern Utah and Colorado to northeastern Arizona and northwestern 

 New Mexico. 



New Mexico: Carrizo Mountains («Stanc?Zfi/ 7314). Dry hills, in the Upper Sonoran 

 Zone. 



