118 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



23. Agave sisalana Perrine, U. S. Sen. 25th Congr. Sess. 2. Doc. 300. pJ. 1, 2, 4. 

 1838. 



Agave rigida sualana Baker, Kew Bull. Misc. Inf. 1889: 254. 1889. 



Yucatan ; type cultivated in Florida from introduced plants. 



Acaulescent ; leaves at length bright glossy green, at first lightly glaucous, 

 nearly flat, 10 cm. wide, 150 cm. long, with a chestnut spine 4 to 5 mm. wide 

 and 20 to 25 mm. long, the straight margin typically unarmed or with a few 

 very rudimentary teeth. " Yaxci," " yax-qui," " green agave," " Sisal hemp," 

 or " Bahama hemp." 



The species most extensively planted, as a source of fiber, outside of Yucat&n. 

 Called " maguey tuxtleco " in Chiapas. 



Sometimes occurring in a form as prickly as the preceding species (f. armata 

 Trel. Mem. Nat. Acad. Sci. 11: 49. 1913) ; and exceptionally with a trunk about 

 1 meter tall. 



24. Ag'ave candelabrum Tod. Hort. Panorm. 1: 66. 1876. 

 Agave rumphii and Agave- laxa Hort. 



Region ? ; type cultivated in Europe. 



Leaves uniformly spreading, green, 7 cm. wide, 100 to 150 cm. long, with 

 conical brown spine 3 mm. wide and 15 to 20 mm. long, and sharply upcurved 

 teeth 10 to 25 or 30 mm. apart and 4 mm. long, the intervening margin straight. 



Perhaps a green extreme of A. cantala. 



25. Agave kirchneriana Berger, Agaven 252. 1915. 



Acaulescent ; leaves dull gray-green, slightly roughened, 7 cm. wide, 125 cm. 

 long, with polished chestnut spine 5 mm. wide and 20 mm. long, and slender- 

 upcurved blackish teeth 15 to 20 mm. apart and 3 to 5 mm. long ; flowers green, 

 50 to 55 mm. long, the openly conical tube half as long as the segments. 



Guerrero ; type from Xochipila or Zumpango. 



" Maguey delgado " ; yielding superior fiber and mezcal. 



26. Agave pacifica Trel., sp. nov. 



Acaulescent ; leaves yellow-green, very lightly glaucous and zoned, 3.5 to 5 

 cm. wide, 50 to 75 cm. long, the purplish red-brown spine 15 to 25 mm. long, 

 often abruptly contracted and slender above the decurrent base, the teeth usually 

 upcurved-triangular, 15 to 25 mm. apart and 3 to 5 mm. long, the intervening 

 cartilaginous margin straight ; flowers greenish yellow, 50 mm. long, the openly 

 conical tube half as long as the segments; capsules shortly stipitate and 

 beaked, 25 mm. broad and 45 mm. long. 



Sonora, Sinaloa, and Tepic; type, in the herbarium of the Missouri Botanical 

 Garden, from Creston Island, MazatlSn, Sinaloa, Trelease, in 1904. 



27. Agave cantala Roxb. Hort. Beng. 25. 1814. 

 Agave vivipara of authors, not L. 



Agave flaccida Ha\y. Syn. PI. Slice. 72. 1812. 



Furcraea cantala Haw. Suppl. PI. Succ. 42. 1819. 



Furcraea madagascariensis Haw. Suppl. PI. Succ. 42. 1819. 



Agave madagascariensis Spreng. Syst. Veg. 2: 79. 1825. 



Agave cantula Roxb. Fl. Ind. 2: 167. 1832. 



Region ? ; type cultivated in India. 



Acaulescent; leaves glaucous, slightly green-lined longitudinally, falcate or 

 straight, ascending, 6 to 10 cm. wide, 150 cm. long, with slender-pointed conical 

 brown spine 3 to 4 mm. wide and 15 to 20 mm. long, and red-chestnut, upcurved, 

 gradually very sharp-pointed teeth 20 to 30 mm. apart and 5 to 6 mm. long. 



