204 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



7. End spine slender, 20 to 50 mm. long; leaves greatly thickened at base, the 

 naked acumination, including the spine, 50 to 150 mm. long; inflores- 

 scence rarely proliferous (8) . 

 8. Flowers greenish or yellowish, more or less tinged with purple; leaves 

 green, lanceolate to linear; prickles usually not more than 5 mm. 

 long, at the middle of the leaf margin 7 to 20 mm. apart; branches 

 of the panicle horizontal, twice as long as the flower clusters; 

 flowers not especially numerous or congested. 7. A. palmeri. 

 8. Flowers yellow, not purple tinged; leaves glaucous, lanceolate or linear- 

 lanceolate; prickles stouter, 7 to 10 mm. long, at the middle of the 

 leaf margin 20 to 35 mm. apart; branches of the panicle ascending, 

 about as long as the flower clusters; flowers congested, occasionally 

 as many as 300 in one cluster 8. A. chrysantha. 



1. Agave utahensis Engelm. in King, Geol. Expl. 40th Par. 5: 497. 



1871. 



? Agave newberryi Engelm., Acad. Sci. St. Louis Trans. 3: 310. 



1875. 

 Agave utahensis var. discreta M. E. Jones, Contrib. West. Bot. 



17: 19. 1930 (in part). 



Coconino and Mohave Counties, 3,000 to 7,500 feet, May and June. 

 Southern Utah and northern Arizona to southeastern California. 



2. Agave parviflora Torr., U. S. and Mex. Bound. Bot. 214. 1859. 

 Mountainous region west of Nogales (Santa Cruz County) along the 



Mexican boundary, type from Pajarito Mountains (Schott), Arivaca 

 to Ruby, 4,600 feet (Peebles and Fulton 1 1444), June and July. Arizona, 

 Chihuahua, and Sonora. 



3. Agave toumeyana Trel. in Bailey, Stand. Cycl. Hort. 1: 238. 



1917; Contrib. U. S. Natl. Herbarium 23: 140. 1920. 

 Pinal Mountains, Pinal or Gila County, 3,500 feet (Tourney 442, 

 the type collection, Peebles 12937, 13008)," Fish Creek Hill, Maricopa 

 County, about 2,000 feet (Peebles 10773), May. Known only from 

 Arizona. 



4. Agave schottii Engelm., Acad. Sci. St. Louis Trans. 3: 305. 1875. 



Agave muljordiana Trel., Contrib. U. S. Natl. Herbarium 23: 

 140. 1920. 



Gila, Pinal, Pima, and Santa Cruz Counties, exposed mountain- 

 sides, 4,000 to 7,000 feet, May to October. Southern Arizona and 

 Sonora. 



Leaves in the typical form yellowish green, 6 to 9 or rarely 12 mm. 

 wide, 15 to 35 cm. long, concave on the upper surface; capsules 10 to 

 15 or even 25 mm. long. The var. treleasei (Tourney) Kearney and 

 Peebles (A. treleasii (sic) Tourney) , is known only from one station on 

 the southern slopes of the Santa Catalina Mountains, 6,500 feet, where 

 Tourney found it growing with the typical form. The stamens are 

 inserted as in the typical form, and the variety differs only in the 

 character of the leaves, which are dark green, 15 to 25 mm. wide, 20 

 to 40 cm. long, and nearly flat on the upper surface. 



5. Agave deserti Engelm., Acad. Sci. St. Louis Trans. 3: 310. 1875. 

 Sierra Estrella, Maricopa County (Peebles 14415), Cunningham Pass, 



Harcuvar Mountains, Yuma County (Peebles and Smith 13881, etc.), 

 2,500 feet; and apparently also in southern Mohave and southwestern 



