THE YUCCEAE. 127 
Plate 37.— Yucca rupicola2? Aberrant sheet of Wright, no. 1909, in 
the Torrey herbarium. 
Plate 38. — Yucca rupicola,—the more normal Gray herbarium sheet 
of Wright, no. 1909. 
Plate 39. — Yucca rupicola.—1, Flowering plant, on limestone hills a 
few miles west of Fort Worth, Texas; 2, Flowers, slightly reduced, of 
plant cultivated by Mr. J. Reverchon, from same locality. 
Plate 40. — Yucca rostrata, at Peyotes, Mex. — Flowering plants. 
Plate 41. — Yucca rostrata, at Peyotes, Mex. — The upper figure show- 
ing the lozenge-shaped leaf-scars. 
Plate 42.— Yucca rostrata, at Peyotes, Mex. — fruiting plants. — The 
foreground is occupied by Agave heteracantha. 
Plate 43.— Yucca gloriosa, in the sand dunes of Tybee Island, Ga. 
Plate 44.— Yucca gloriosa, Tybee Island, Ga.—1, Smooth-barked 
trunk, with roots, exposed by the shifting of the sand; 2, With partly 
grown fruit, photographed in May. 
Plate 45. — Yucca gloriosa minor, cultivated in the Missouri Botanical 
Garden. — At the left are Y. aloifolia, with narrow leaves, and Y. elephan- 
tipes, with broad more flexible leaves. 
Plate 46.— 1, Yucca gloriosa superba, fruit and cross section, natural 
size, —cultivated in Washington, D. C. (Schott); 2, Yucca recurvifolia, 
fruit, natural size, cultivated at Bluffton, S. C. (Mellichamp, in 1901). 
Plate 47.— 1, Yucca recurvifolia (2 m. high), cultivated in the National 
Cemetery, Vicksburg, Miss.; 2, Yucca flexilis Hildrethi, escaping, at St. 
Augustine, Fla., photographed in May. 
Plate 48.—‘* Yucca De Smetiana,’”’ cultivated in the Yucca tower 
of the Missouri Botanical Garden. 
Plate 49, — Yucca aloifolia. — 1, Associated with Ipomoea Pes-Capreae, 
on the dunes of South Beach, St. Augustine, Fla.; 2, Overgrown with 
Smilax, on the dunes of Tybee Island, Ga. 
Plate 50. — Yucca aloifolia Menandi, type plant cultivated at the Mis- 
souri Botanical Garden. — Photographed by P. T. Barnes. 
Plate 51. — Yucca elephantipes. —1, A large tree, at El Florido, Guate- 
mala; 2, The dilated base of a tree, at Chinautla, Guatemala. 
Plate 52.— Yucca Treculeana. —1, In flower, cultivated at C. P. Diaz, 
Mex.; 2, In fruit, near Peyotes, Mex. 
Plate 53.— Yucca Treculeana canaliculata. Cultivated in the Alamo 
Plaza, San Antonio, Tex. 
Plate 54.— Yucca Treculeana canaliculata. Cultivated at the Mis- 
souri Botanical Garden. — Photographed by P. T. Barnes. 
Plate 55.— Yucca Schottii, west of Nogales, Ariz., photographed in 
August: the second figure, from near the boundary monument in the 
Sierra del Pajarito. 
Plate 56.— Yucca Schottii Jaliscensis. ‘‘Izote’’, in the suburbs of 
Zapotlan, Mexico, photographed in September. 
Plate 57. — Yucca brevifolia. The mixed type-sheet, in the Torrey her- 
