118 MISSOURI BOTANICAL GARDEN. 
As it occurs from a little way east of Sierra Blanca to 
the vicinity of Malone, this tree is usually 2 or 3 m. high, 
rarely reaching 5 meters, and the thin-barked stem, which 
may reach a diameter of about half a meter, very rarely 
branches, though occasionally one or two ascending 
branches are produced. Well developed plants, even if 
small, differ conspicuously from those of Yucca macrocarpa 
in their rounder head and the usually greater number of 
their spreading leaves, which, smooth or at most slightly 
roughened on the occasional dorsal angles, are of a crab- 
apple green, openly concave to the very short stout spine, 
and though at first coarsely filiferous, later have only a few 
short pectinate thickish fibers toward the tip, while the 
remainder become detached to the base, where they remain 
in a loosely cobwebby mass between the leaves, which in age 
become reflexed and normally persist as a thatch on the 
trunk even to its base. On vigorous plants the leaves 
attain a width of 75 mm. and a length of 1.25 m. 
This species, which is well described by Professor Sar- 
gent, under the name Yucca macrocarpa, I take pleasure in 
dedicating to Mr. C. E. Faxon, whose excellent figures of 
it in the Silva faithfully represent its technical characters. 
S. Carnerosana Trelease. 
A simple or rarely slightly branched tree, 1.5 to 6 m. high, at length 
.7 m. in diameter. Leaves as in the last. Panicle on a stout white- 
bracted stalk, densely branched close above the leaves, glabrous or 
exceptionally tomentose. Flowers expanding 75 to 100 mm., the cylin- 
drical tube 12 to 25mm. long. Fruit oblong, 50 to 75 mm. long, 40 mm. 
in diameter: seeds 7 to 9X8 to 10 mm.— Frontispiece to article and 
plates 72-75. 76,f. 1. 77. 81,f.12. 83, f. 2. 
Northeastern Mexico, from the Carneros pass to about 
Catorce and Cardenas. — Plate 94, f. 2. 
Some years since, Mr. C. G. Pringle made characteris- 
tically excellent herbarium specimens of a tree which 
forms large forests about Carneros, Mexico, which were 
distributed as doubtfully representing a variety of Yucca 
