THE YUCCEAE. 129 



Plate 79. Samuela Carnerosana, from the Carneros Pass, Mex., 

 natural size. 1, Inflorescence bud; 2, Flower, with nearer part of 

 perianth removed, and half grown fruit with the persistent split perianth 

 tube upwards of 2 cm. long. 



Plate 80. 1, Samuela Carnerosana, in the Carneros Pass, Mex.; 2, 

 Yucca flaccida, var., cultivated at the Missouri Botanical Garden. Both 

 reduced. The perianth differences of the two genera are well shown. 



Plate 81. Samuela Carnerosana, in the Carneros Pass, Mex. 1, A 

 trunk decorticated by slashing it on the two sides and tearing the leaves 

 down, exposing the pulpy interior for stock to feed upon; 2, A fruit, 

 somewhat reduced, showing the split dried perianth tube. 



Plate 82. Yucca elephantipes, at Chinautla, Guatemala, and Samuela 

 Faxoniana, at Sierra Blanca, Texas. Flowers, reduced about one-third. 



Plate 83. Seeds of Yuccas, natural size.* 1, Y. Jilamentosa con- 

 cava, Isle of Palms, S. C. (Trelease) ; 2, I", flaccida glaucescens, culti- 

 vated at the Missouri Botanical Garden ; 3, T". tenuistyla, Industry, Tex. 

 (Lindheimer) ; 4, Y. constricta, Uvalde, Tex. (Trelease); 5. Y. radiosa, 

 Presidio, Tex. (Trelease) ; 6, Y. angustissima near Grand Canon, Ariz. 

 (Trelease); 7, Y. Arkansana, New Braunfels, Tex. (Lindheimer); 8, 

 r. Louisianensis, Atoka, Ind. Ter. (Butler) ; 9, Y. glauca, N. W. Mis- 

 souri (Bush); 10, Y. Harrimaniae, Helper, Utah (Trelease). 



Plate 84. Seeds of Yuccas, natural size. 1, Y. rigida, Picardias, 

 Mex. (Trelease); 2, Y. rupicola, New Braunfels, Tex. (Lindheimer); 3, 

 Y. rostrata, Peyotes, Mex. (Trelease) ; 4, Y. gloriosa superba, cultivated 

 in Washington, D. C. (Schott); 5, Y. recurvifolia, cultivated at Bluffton, 

 S. C. (Mellichamp) ; 6, T. aloifolla, Bluffton, S. C. (Mellichamp) ; 7, 

 Y. elephantipes, cultivated at the Missouri Botanical Garden; 8, Y. Tre- 

 culeana, New Braunfels, Tex. (Lindheimer). 



Plate 85. Seeds of Yucceae, natural size. 1, Yucca Schottii, Pinal 

 Mts., Ariz. (Pringle); 2, Y. australis, Parras, Mex. (Trelease); 3, 

 Y. valida, Gutierrez, Mex. (Trelease) ; 4, Y. baccata, Grand Cafion, Ariz. 

 (Trelease); 5, Y. macrocarpa, near Presidio, Tex. (Trelease); 6, Y. 

 Mohavensis, Drake, Ariz. (Trelease); 7, Hesperaloe parviflora, Texas 

 (Wright) ; 8, H. funifera, Hacienda de Angostura, Mex. (Pringle, no. 

 3911); 9, Hesperoyucca Whipplei, Arrowhead Springs, Calif . (Trelease) ; 

 10, Clistoyucca arborescens (Palmer); 11, Samuela Faxoniana, Sierra 

 Blanca, Tex. (Trelease); 12, S. Carnerosana, Carneros Pass, Mex. 

 (Trelease). 



Plate 86. Germination of Yuccas, natural size. 1, T. radiosa; 2, Y. 

 macrocarpa. 



Plate 87. Germination of Yucceae, natural size. 1, Clistoyucca ar- 

 borescens; 2, Samuela Carnerosana. 



Plates 88-99. Geographical distribution of Yucceae. Stations noted 

 by the author are indicated by a X> aod the general range known to him 

 is shown by horizontal shading. Many gaps require filling. 



* The figures in this and the following plates are numbered from left 

 to right in the several rows, beginning with the uppermost. 



9 



