PaO co Se a, ots an tg 
THE YUCCEAE. 63 
the Rocky 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 been 
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. 
Y. angustifolia mollis Engelmann, Trans. Acad. St. Louis. 3350, 51. 
(1878). — Watson, Proc. Amer. Acad. 143; 253. 
¥. glauca mollis Branner & Coville, Ann. Rept. Geol. Surv. Arkansas 
for 1888. 43224. 
