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STANDLEY — TREES AND SHRUBS OF MEXICO. 133 



117. Agave asperrima Jacobi, Hamb. Gart. Zeit. 20: 561. 1864. 



Texas, on the lower Rio Grande ; and adjacent Coahuila, Zacatecas, and 

 Durango; type cultivated in Europe, supposedly from Texas. 



Leaves dull glaucous green, rough, 1.5 to 20 cm. wide, 120 cm. long, with 

 decurrent brown spine 3 to 4 or 6 mm. mde and 30 to 55 mm. long, and vari- 

 ously curved triangular teeth 20 to 30 mm. apart and 7 to 10 mm. long, these 

 saddling and sometimes confluent over high fleshy hummocks. 



Seeds were distributed to gardens by Engelmann as A. longispma. 



118. Ag-ave palmeri ^ Engelm. Trans. Acad. St. Louis 3: 319. 1875. 



New Mexico, Arizona, and adjacent Sonora; type locality, mountains of 

 southern Arizona. 



Leaves blue-green, smooth, varying much in shape and attenuation, ascend- 

 ing or outcurved or spreading, about 8 to 10 cm. wide and 45 to 70 cm. long, 

 with nearly straight, needle-shaped, somewhat decurrent, garnet or purplish, 

 finally fading spine 2 to 4 mm. wide and 20 to 40 mm. long, and variously 

 straight or curved, very unequal, triangular teeth commonly 10 to 20 mm. 

 apart and 3 to 5 mm. long, the intervening margin straight or much hollowed. 



119. Ag'ave flexispina Trel., sp. nov. 



Leaves green or bluish, smooth, regularly spreading, deeply concave, 6 cm. 

 wide and 12 cm. long (or much more ?), with flexuous spine 5 mm. wide and 

 30 mm. long, this very openly flat-grooved, with acute margin at base, the 

 slender unequal teeth scarcely 10 mm. apart and often nearly 10 mm. long, the 

 margin between them sharply incised ; flowers nearly sessile, agreeing with 

 those of the last preceding species. 



Durango; type, in the herbarium of the Missouri Botanical Garden, from 

 Tepehuanes, Palmer 330, in 1906. 



120. Agave dasylirioides Jacobi & Bouche, Hamb. Gart. Zeit. 21: 344. 1865. 

 Guatemala ? ; type cultivated in Europe ; Berlin Herbarium material referring 



the collection to the igneous mountains near QuezsxltenRUgo *Warscewicz, or 

 southern Mexico. 



Leaves outcurved and then ascending, thin and flat, light green, 10 to 15 mm. 

 wide, 25 to 30 cm. long, unarmed except for the small flattened brown spine ; 

 spike 1.5 to 2 meters tall, recurving. 



121. Agave intrepida Greenm. Proc. Amer. Acad. 34: 567. 1899. 

 Moreios ; type locality, El Parque, above Cuernavaca. 



Leaves gray, spreading, 2 cm. wide, 50 cm. long, with somewhat flexuous 

 needle-like brown spine 1 to 2 mm. wide and 10 mm. long, the margin almost 

 microscopically denticulate ; spike 1 to 1.5 meters tall, commonly recurving. 



122. Agave bracteosa S. Wats. Gard. Chron. n. ser. 18: 776. 1882. 

 Nuevo Leon ; type locality, near Monterrey. 



Leaves gray, rather soft, openly ascending with recurved tips, 4 cm. wide, 45 

 cm. long, without spine, the margin minutely denticulate; inflorescence 1 to 2 

 meters tall, the scape densely covered with outcurved narrow bracts ; flowers 30 



^The species is named in honor of Edward Palmer (1831-1911), an English- 

 man by birth, who was for most of his life a resident of the United States. 

 He spent many years in Mexico in botanical exploration, and his collections 

 are surpassed in extent, probably, by those of no other collector. His work in 

 Mexico began about 1870 and was continued until 1910. He collected chiefly 

 in the northern states, but some of his plants were obtained as far south as 

 Guerrero and Veracruz. His earlier collections were the basis of special 

 reports by Gray and Watson, and many new species have been based upon his 

 specimens. 



