THE YUCCEAE. 55 



which he called Y. constricta, and described as being shortly 

 caulescent with leaves similar to but shorter than those of 

 the Rocky Mountain species now called Y. glauca, long- 

 stalked panicle, and capsules constricted in the middle. 

 When Dr. Engelmann raised to specific rank the arborescent 

 species that replaces this to the west, under the name Y. 

 elata,* he was particular to exclude from it Y. constricta, 

 which he regarded as a caulescent form of Y. glauca; but 

 this conclusion, which did not accord with the description 

 of fruit and inflorescence given by Buckley, was subsequently 

 changed by himf and has not been followed by other writers, 

 who have considered F. data and Y. constricta to be syn- 

 onymous, t 



From observations made about Putnam, Texas, in 1892, 

 and at various points west of San Antonio in 1900, 1 should 

 say that Y. constricta is quite distinct from both the pre- 

 ceding and the next species, differing from the former in 

 its narrower and firmer leaves and more ample inflorescence, 

 and from the latter in its usually very short stem, smaller 

 constricted dark capsules, and much smaller seeds. 



Among a number of plants selected by Mr. James Gur- 

 ney a few years since in Seward County, Kansas, for the 

 demonstration of the great variability in the leaves of 

 Y. glauca, is one which in foliage could hardly be dis- 

 tinguished from the usual form of that species, or the 

 somewhat broader-leaved variety by which the latter is 

 represented in that part of Kansas, but which, on blooming 

 in the Missouri Botanical Garden in 1900 produced a 

 rather ample long-pedunculate panicle of pure white flow- 

 ers, with white styles, which began to expand with the 



* Bot. Gazette. 7 : 17. (1882). 

 f Trans. Acad. St. Louis. 3:213. 



% Baker, Journ. Linn. Soc. Bot. 18 : 229. Sargent, Silva. 10 : 27. 

 Kept. Mo. Bot. Gard. 4 : 207, under T. glauca stricta (= Y. Ar- 

 kansana). 



