* 

 Yucca. LILIACE.E. 163 



* Fruit inflated, the cells not burst by the maturing seed. 



1. N. Bigelovii, Watson, 1. c. Leaves flat, nearly an inch wide above the broad 

 deltoid base, not carinate, 3 or 4 feet long, the margin roughish : " scape 3 feet 

 high " : branchlets of the compound panicle slender, an inch or two long : perianth- 

 segments a line long : fruiting pedicels very slender, 2 to 4 lines long, jointed near 

 the middle : fruit very thin, 4 or 5 lines in diameter, deeply emarginate at both 

 ends : seeds ovate-oblong, 2 lines long, whitish, slightly reticulated. Dasyiirion 

 Bigelovii, Torr. Pacif. R. Rep. iv. 151. Beaucarnea Biyelovii, Baker, 1. c. 326. 



On mountain-sides above Williams River in W. Arizona, and likely to occur in the mountains 

 of San Bernardino County bordering the Colorado Desert. The characters of the caudex and 

 flowering stem are unknown. 



2. N. Parryi, Watson, 1. c. Caudex 3 to 6 feet high : leaves resembling those 

 of the last species, but thicker and somewhat concave above, especially toward the 

 stout apex, very strongly serrulate on the margin : branchlets of the panicle and the 

 pedicels stouter: perianth-segments 1J lines long: fruit 6 lines in diameter, rather 

 more thickly membranous : seeds subglobose, the very thin transparent testa finely 

 and irregularly wrinkled. 



On the western border of San Bernardino Desert, Dr. C. C. Parry, 1876. 



* * Fruit smaller and soon bursting, leaving the globose seeds exposed. 



3. N. Falmeri, Watson, 1. c. Leaves as in the preceding, flat, very strongly 

 serrulate : flowering stem smooth and glabrous : panicle very narrow, 3 feet long, 

 the partial panicles pyramidal, only 3 inches long or less, and the branchlets an inch 

 long ; primary bracts large and dilated : pedicels 2 lines long : flowers very small, 

 the segments less than a line long : stigmas upon a short style : fruit 2 lines broad 

 before rupture : seeds globose, with very thin transparent smooth ish testa. 



Near the southern border, in the Tantillas Mountains, Lower California, Dr. E. Palmer, 1875. 



17. YUCCA, Linn. SPANISH BAYONET. 



Perianth large and campanulate, or spreading, of 6 white or whitish somewhat 

 persistent ovate-lanceolate many-nerved segments woolly at the apex. Stamens in- 

 cluded, adnate to the base of the segments ; filaments clavate, often papillose ; 

 anthers short, oblong, sagittate or didymous, versatile, introrse. Ovary sessile, 

 oblong or subglobose ; stigmas 3, emarginate and more or less connate, sessile or on 

 a stout tubular persistent style. Fruit more or less fleshy and baccate, or a dry and 

 septicidal or loculicidal capsule, the cells incompletely divided by a partition in- 

 truded from the back. Seeds numerous, in 2 rows in each cell, flat, horizontal, with 

 thin black testa. Embryo diagonal, straight or curved. Caudex woody, soft and 

 fibrous, simple or branched, very short or becoming tall and palm-like, bearing the 

 sessile or pedunculate inflorescence or often a tall bracteate flowering stem ; leaves 

 numerous, crowded, thick and rigid, persistent, linear or narrowly lanceolate, usually 

 spine-tipped, with smooth or serrulate or filamentose margins ; flowers in an ample 

 compound panicle, usually solitary and nodding, opening at evening; pedicels 

 jointed near the summit. Engelmann, Trans. St. Louis Acad. iii. 17. 



An American genus of a dozen or more species, most abundant in the southern United States 

 and northern Mexico, one species ranging nortliward to Dakota and two or more belonging to 

 Guatemala. 



* Perianth campanulate : filaments obtuse, papillose, at length spreading/ or 

 recurved anthers cordate-sagittate : stigmas papillose, more or less distinct : 

 fruit mostly ft? shy and indehiscent. EUYUCCA, Engelm. 



