192 MISSOURI BOTANICAL GARDEN. 



commonly unbranched or with only a double crown, they 

 sometimes develop several large, more or less spreading 

 branches. The very concave leaves are of a clear green 

 color, and either entirely smooth to the touch or only 

 slightly scabrous on the few angles which sometimes run 

 longitudinally on the back. Their margin on unfolding is 

 entire, purplish brown, and dilates into the firm but blunt 

 brown tip, from which, after the leaves have expanded, it 

 breaks away in the form of numerous stout gray or brown- 

 ish fibers, pectinately spreading near the apex, and becom- 

 ing longer and more remote below, so that ultimately the 

 leaves are not filiferous except for a few crowded short fibers 

 immediately below the point, and a more or less abundant 

 aggregation of loose threads between their bases, causing a 

 cobwebby appearance. The older leaves for a long time are 

 reflexed against the trunk, and appear to be more fibrous 

 and rigid than those of Schottii and baccata. The infiores- 

 cence is ample, recalling that of Treculeana, and the con- 

 spicuous white bracts sometimes measure as much as 3X12 

 inches . 



In the Texan region indicated, this form grows with 

 Yucca data, baccata being absent; but it blooms a full 

 month earlier than the associated species. Its fruit, like 

 that of several of the other baccate species, is usually 

 lon<r beaked, and the seeds are tunneled in the manner 

 characteristic of the work of Pronuba, the pulp being per- 

 forated by the escaped larvae. I was unable to study this 

 species in bloom, but large fruits gathered some three 

 weeks after fertilization show none of the constrictions or 

 indentations which so commonly mark the ovipositing punc- 

 tures of the Pronuba moths, which leads to a suspicion that 

 the eggs may be deposited in the upper part near the stigma. 



Y. valida, Brandegee. — In admitting this species to the 

 list of Yuccas published in the Third Report, I had over- 

 looked the fact that Mr. Brandegee* himself has referred 



* Proc. Calif. Acad. (2), iii. 175. 



