THE YUCCEAE. 63- 



the Kocky Mountain Y. glauca has been found in that 

 region, the nearest approach being the Gulf plant here 

 called Y. Louisianensis. 



A few years since, Mr. James Gurney, Head Gardener of 

 the Missouri Botanical Garden, was struck with the variety 

 of foliage and difference in vigor of growth shown by the 

 soap plants of Seward County, in extreme southwestern 

 Kansas, and he selected for the Garden and for Tower 

 Grove Park a considerable number of plants to show the 

 differences. Some of these plants, which have made a 

 remarkably rapid growth, have now come into bloom. 

 They differ considerably both as to their tendency to form 

 a short trunk and in breadth and flexibility of foliage, 

 though in this latter respect coming within the known 

 range of variation of Y. glauca , and to an equal extent in 

 inflorescence, the variation in the two characters, however, 

 not appearing capable of connection. While some of 

 the plants produce a simple inflorescence, indistin- 

 guishable from that of Y. glauca , others almost exactly 

 match the original figure of Y. stricta, and still others, 

 with the same compound inflorescence, have the branches 

 originating at about the top of the leaves instead of in the 

 leaf -cluster. There seems to be little doubt that these 

 plants represent the true stricta of Sims, and that the At- 

 lantic States locality assigned to this when it was published 

 rests upon some sort of error. Although, as has beer* 

 said, the cultivated plants produce either simple or branched 

 inflorescence, the prevalence of the latter in those which- 

 are strongly developed, and the rareness of branching in 

 the usual form of Y. glauca, make it desirable to recog- 

 nize this form varietally. 



Y. Arkansana Trelease. 



f. angustifolia mollis Engelmann, Trans. Acad. St. Louis. 3 : 50, 51. 



(1873). Watson, Proc. Arner. Acad. 14:253. 

 T. glauca mollis Branner & Coville, Ann. Kept. Geol. Surv. Arkansas- 



for 1888. 4 : 224. 



