128 CONTRIBUTIONS FROM THE NATIONAL, HERBARIUM. 



91. Agave nelsoni Trel. Rep. Mo. Bot. Gard. 22: 61. 1911. 

 North-central Baja California ; type locality, San Fernando. 



Leaves glaucous, 7 cm. wide, 18 to 35 cm. long, with blackish or fading spine 

 5 mm. wide and 30 cm. long, and fragile, brown or whitish, broadly triangular 

 teeth 10 to 20 mm. apart and 5 mm. long, the intervening margin nearly 

 straight. 



92. Ag'ave weberi Cels; Poisson, Bull. IMus. Hist. Nat. 7: 231. 1901. 



. Coahuila, Nuevo Leon, Durango, and San Luis PotosI; type cultivated in 

 Europe, from Moctezuma, San Luis Potosi. 



Leaves nearly straight, 15 cm. wide, 120 to 200 cm. long, green, somewhat 

 glaucous, with straight brown spine 5 mm. wide and 40 to 50 mm. long, the 

 margin typically without teeth but sometimes bearing a very few small rudi- 

 mentary teeth ; capsules 30 mm. broad and 55 mm. long, stipitate but scarcely 

 beaked ; bulbiferous. 



" Maguey liso " ; yielding aguamiel and containing a usable fiber. 



93. Agave latissima Jacobi, Hamb. Gart. Zeit. 20: 499, 551. 1864. 

 Agave gracilis .Jacobi, Abh. Schles. Ges. Vaterl. Cult. 1870: 150. 1870. 

 Agave macroculmis Tod. Hort. Panorm. 2: 51. 1891. 



MichoacSn ; type cultivated in Europe. 



Leaves bright green or slightly glaucous, 20 to 30 cm. wide, 100 to 150 cm. 

 long, with a stout conical spine as much as 25 mm. long, or a very heavy com- 

 pressed spine base 20 mm. wide and 10 to 20 mm. long bearing a somewhat 

 refracted tip 3 mm. wide and 5 mm. long, and short triangular teeth 20 to 30 

 mm. apart and 1 to 2 mm. long, or these commonly closer together or almost 

 or quite confluent and from half-round graying horny bases. 



Yielding " aguamiel " and fiber. Sometimes grown in gardens as A. coccinea. 



94. Agave ferox Koch, Wochenschr. Ver. Beford. Gartenb. 3: 23. 1860. 

 A^alley of Mexico ; type cultivated in Europe under a name suggesting con- 

 fusion with the next. 



Leaves acuminate, rather abruptly outcurved above the middle, undulate 

 and very deeply crenate, green, 30 cm. wide, 120 cm. long, with long, sometimes 

 flexed, gray spine 8 to 10 mm. ^ide and 60 mm. long, and rather recurved 

 teeth 15 mm, long and 30 to 60 mm. apart on very high fleshy prominences. 



95. Agave mitraeformis Jacobi, Abh. Schles. Ges. Vaterl. Cult. 1868: 145. 1868. 

 Agave coarctata .Jacobi, Abh. Schles. Ges. Vaterl. Cult. 1868: 147. 1868. 

 Puebia and adjacent Veracruz ; type cultivated in Europe ; the name taken 



for the common " maguey cimarron " of the vicinity of Tehuacan. 



Leaves long-acuminate, concave, slightly gray-and-green-zoned, 30 cm. ^vide, 

 75 cm. long, with long, relatively slender spine and large triangular teeth 

 between which the margin is concave. 



Cultivated sometimes as A. honnettiana and A. selloum. 



96. Agave compluviata Trel. in Bailey, Stand. Cycl. Hort. 1: 234. 1914. 

 Durango; type locality, Pueblito. 



I^eaves gray, zoned with green, acute, deeply gutter-shaped, with upcurved 

 sides, the back somewhat ridged, 40 cm. wide and 120 cm. long or more, with 

 rather long conical gray spine and triangular, more or less recurved, rather 

 large teeth between which the margin is somewhat hollowed. " Maguey verde." 



Cultivated for aguamiel and a sort of pulque. 



97. Agave felina Trel., sp. nov. 



Leaves dull, glaucous, 20 cm. wide, 150 cm. long, with slightly flexuous spine 

 7 mm. wide and 45 mm. long, and clawlike teeth 15 to 20 mm. apart and 5 to 

 10 mm. long, the intervening margin repand or often incised. 



