THE YUCCEAE. 101 



Uliferous. Inflorescence panicled close above the leaves, glabrous. 

 Flowers apparently rather small, with tapering style. Fruit baccate, 

 large: seeds 9 to 10 X 10 to 12 mm. Plates 57-59. 



About Nogales, Arizona, on the Santa Cruz river, and in 

 the rugged mountains west of that city. Flowering in 

 May. Plate 96, f. 2. 



In the course of his work connected with the original 

 survey of the boundary between the United States and 

 Mexico, Mr. Arthur Schott collected, in the upper Santa 

 Cruz valley, and near the boundary monument in the Sierra 

 del Pajarito, a small arborescent Yucca, for which he pro- 

 posed the manuscript name Y. brevifolia. His specimens 

 were referred to Y. puberula Haw., in 1859, by Dr. Tor- 

 rey, who, however, printed Schott' s proposed name as a 

 synonym. In 1873 Engelmann, recognizing that they do 

 not represent the Y. puberula of Haworth, which is an 

 acaulescent plant scarcely differing from typical Y. flaccida, 

 proposed for them the name Y. Schottii, with the remark 

 that Mr. Schott " may possibly have mixed the fruit of 

 Y. baccata with the foliage of the new plant; but the 

 leaves appear so peculiar that there can scarcely be a doubt 

 about the distinctness of the species to which they be- 

 long." 



The fragmentary specimens collected by Schott, by which 

 and his notes and sketches alone his Y. brevifolia appears 

 to be represented in herbaria, consist of a sheet in the Torrey 

 herbarium, bearing smooth, stoutly pointed, very thick and 

 rigid leaves cut off above the base, about 25 mm. wide, 

 plano-convex except toward the pungent apex where they 

 are somewhat concave, and with long slender straight mar- 

 ginal fibers; panicle fragments, some of which are glabrous 

 and others softly tomentose ; flowers, the bases of which 

 are pubescent, suggesting that they probably belong with 

 the pubescent pedicels ; and a glabrous branchlet bearing 

 an immature fruit which may have been either erect on an 

 .ascending branch, or, as is more likely, pendent from a 



