100 MISSOURI BOTANICAL GARDEN. 
mm. and therefore much larger than usual in Y. Schottiz, 
is not otherwise different from the leaves of that species. 
In 1892 Mr. Marcus E. Jones collected and photographed 
a Yucca at Chiquilistlan, to which he gives the local name 
‘« desoti, ’’ — which is doubtless merely a phonetic variant 
of isote or izote; and good specimens, evidently of the same 
species, were made by Mr. Pringle at Zapotlan (no. 4392) 
and distributed under the name Y. Schottii. 
While the herbarium specimens of this izote of the 
Mexican state of Jalisco are hardly referable elsewhere 
thanto Y. Schottii, Mexicans in the vicinity of the Pajarito 
mountains, west of Nogales, assured me that the true 
Y. Schottii of that region is not the izote that they knew 
further south, which, as they asserted, is a larger, more 
branched tree. Photographs taken by Mr. Jones, in fact, 
show this to be true, at Chiquilistlan, as does the accom- 
panying plate from photographs taken by me in 1901 at 
Zapotlan, where, though very abundant in the suburbs, in 
hedge-rows, etc., the izote appears to occur only as a culti- 
vated plant. The much larger size, stout trunk enlarged 
below, more branched habit, and rather more staring 
leaves, are the only characters by which I am able to dis- 
tinguish it from Y. Schottii, so that at most I should call 
it a variety of the latter. The tree figured by Dr. Rose* 
from a photograph taken in the vicinity of the city of 
Mexico, and supposed to represent the izote, is doubtless 
Y. australis. 
33. Leaves thick and firm, with usually coarser fibers. 
4. Leaves narrow, falcate, smooth. 
Y. srevirouia Schott, in Torrey, Bot. Bound. 221. 
(1859).— Engelmann, Trans. Acad. St. Louis. 3: 46. 
Y. puberula Torrey, Bot. Bound. 221. 
Shortly caulescent, scarcely reaching a height of 2 m., mostly cespi- 
tose. Leaves green, smooth, rigidly divergent, often falcate, thick, plano- 
convex, very pungent, .3 to .6 m. long, 6 to 25 mm. wide, the margin freely 
* 1c. pl 88 
