88 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Ovules numerous in each cell ; flowers large, perfect. 

 Flowers scai'cely 1.5 cm. wide, greenish; anthers oblong__l. HESPERALOE. 

 Flowers 5 to 10 cm. wide, white or yellow ; anthers short-sagittate. 



Style filiform; stigma papillate 2. HESPEROYUCCA. 



Style stout ; stigma not papillate. 

 Perianth gamophyllous, tubular below, the stamens inserted in the throat. 



3. SAMUELA. 

 Perianth polyphyllous or nearly so, campanulate, the stamens inserted at 



the base 4. YUCCA. 



Ovules 2 or 3 in each cell ; flowers small, unisexual. 

 Ovary 3-celled ; fruit oxalate. 



Fruit deeply 3-lobate, often inflated 5. NOLINA. 



Fruit not lobed or inflated 6. CALIBANUS. 



Ovary 1-eelled ; fruit 3-winged. 



Perianth segments entire ; leaves somewhat ribbed, the margins not prickly. 



7. BEAUCARNEA. 



Perianth segments denticulate ; leaves not ribbed, the margins usually 



prickly 8. DASYLIRION. 



1. HESPERALOE Engelm. ; S. Wats, in King. Geol. Expl. 40th Par. 5: 497. 1871. 



Reference: Trelease, Rep. Mo. Bot. Gard. 13: 29-38. ph 1-Ji. 1902. 



Plants acaulescent or nearly so; leaves linear, with filiferous margins; 

 inflorescence paniculate, with few branches. 



Flowers green, tinged with purple 1. H. funifera. 



Flowers rosy red or salmon-colored 2. H. parviflora. 



1. Hesperaloe funifera (Koch) Trel. Rep. Mo. Bot. Gard. 14: 36. 1902. 

 Yucccu funifera Koch, Belg. Hort. 12: 132. 1862. 



Hesperaloe davyi Baker, Kew Bull. 1898: 226. 1898. 



Coahuila, Nuevo Leon, and San Luis PotosI ; described from cultivated plants. 



Leaves sometimes nearly 2 meters long and 4 cm. wide ; inflorescence 2 to 2.5 

 meters high, the flowers campanulate, about 2.5 cm. long; capsule 2.5 to 5 cm. 

 long, witli large flat black seeds. " Samandoque." 



The plant is said to be planted in Nuevo Leon for the fiber obtained from 

 the leaves. The fiber is long and of excellent quality. It is exported as 

 " ixtli " or " Tampico fiber." 



2. Hesperaloe parviflora (Torr.) Coulter, Contr. U. S. Nat. Herb. 2: 436. 1894. 

 Yucca parviflora Torr. U. S. & Mex. Bound. Bot. 221. 1859. 



Aloe yuccaefoUa A. Gray, Proc. Amer. Acad. 7: 390. 1867. 



Hesperaloe yuccaefoUa Engelm.; S. Wats, in King, Geol. Expl. 40th Par. 5: 

 497. 1871. 



Southwestern Texas, the type collected between the mouth of the Pecos and 

 the Nueces. There is little doubt that the species occurs also on the Mexican 

 side of the Rio Grande, in Coahuila. 



Leaves 1 to 1.25 meters long, about 2.5 cm. wide ; inflorescence 1 to 1.25 

 meters high; flowers about 3.5 cm. long; capsule 2.5 cm. long or larger. 



2. HESPEROYUCCA (Engelm.) Baker, Kew Bull. 1892: 8. 1892. 



Reference: Trelease, Rep. Mo. Bot. Gard. 13: 38^1. ijI. J,, 5. 1902. 

 1. Hesperoyucca Whipple! (Torr.) Baker, Kew Bull. 1892: 8. 1892. 



Yxieca wMpplei Torr. U. S. & Mex. Bound. Bot. 222. 1859. 



Mountain slopes, Baja California. California; type from Pasqual. 



Plants acaulescent or nearly so; leaves linear, stiff, 0.3 to 1 meter long, 1.5 

 cm. wide, sharp-pointed, glaucous; inflorescence 2 to 5 meters high, dense, the 

 flowers white, pendent, fragrant; capsule about 5 cm. long. 



