WOOTON AND STANDLEY—NEW PLANTS FROM NEW MEXICO. 115 
perianth segments pure creamy white, not greenish, 60 to 65 mm. long, broadly 
lanceolate or lance-elliptic, acute; style narrowly oblong, about 1 cm. long, 
white; filaments slender, papillose; fruit oblong, dehiscent, 5 cm. long, 2.5 cm. 
thick, rough, costate on the back, erect, short-beaked; seeds dull black, semi- 
orbicular, somewhat oblique, rounded on the angles, 10 to 12 mm. long, 8 or 
9 mm broad, smooth. 
Type in the U. 8S. National Herbarium, no. 686602, collected on a dry slope 
in pine woods in the Tunitcha Mountains, August 8, 1911, by Paul C. Standley 
(no. 7638). The description of the fruit is drawn from specimens collected in 
a canyon of the Carrizo Mountains, July 30, 1911, Standley 7448. The plant is 
named for Mr. Vernon Bailey of the Biological Survey, who first collected it in 
the Chusca Mountains at an elevation of about 2,700 meters. 
This was at first believed to be Y. angustissima Engelm., but when complete 
material was collected in the summer of 1911 it was seen to differ essentially from 
that species. Yucca angustissima has much smaller flowers, strongly constricted 
capsules, a branched inflorescence, and much smaller seeds of a different shape, 
and lacks the foliaceous bracts of the inflorescence. Yucca baileyi reaches a 
higher elevation than any other of our species of the genus, being the only one 
that extends into the Transition Zone. It reaches much farther up into the 
mountains than Y. baecata. So far as we know the species is confined to the 
chain of mountains including the Chuscas at one end and the Carrizos at the 
other. It is not improbable, however, that it may be found in some of the not 
far distant ranges of Arizona and Utah. 
Yucca neomexicana Wooton & Standley, sp. nov. 
Acaulescent from a thick root, propagating by means of numerous radiat- 
ing rootstocks, the young plants at the ends of these forming a more or less reg- 
ular circle about the old plant; leaves short, 25 to 30 cm. long, 8 to 10 mm. wide, 
constricted near the base and there only about 5 mm. wide, acute and tipped 
with a slender, straw-colored, very sharp point, glabrous, rather thin, smooth, 
yellowish, the margins white, cartilaginous, abundantly filiferous below the 
middle with coarse, white, straight but finally curled filaments; inflorescence a 
simple raceme, 60 to 90 cm. high, stout, glabrous, bearing at the base 1 or 2 
short, reduced leaves. above furnished with numerous narrowly triangular, 
scarious, white to purple bracts; pedicels stout, 12 to 20 mm. long, recurved. 
in flower; perianth nearly white, 4 cm. long, the segments elliptic-oblong or 
oblong, obtuse or acutish; style short, greenish, 5 to 7 mm. long, swollen at 
the base; filaments densely papillose; fruit not seen. 
Type in the U. S. National Herbarium, no. 685238, collected on a voleanic 
hill about half a mile vorth of Des Moines, Union County, June 20, 1911, by 
Paul C. Standley (no. 6208). Altitude about 2150 meters. Additional ma- 
terial is mounted on sheets 685259 and 685240. The description is drawn 
chiefly from material*preserved in formalin. Young plants are growing in the 
greenhouse at Washington. 
The plant was very abundant in this one locality, growing al! over the top 
of a low hill, in loose, rocky soil. It was not observed elsewhere. Yucca 
glauca was common on the sides of the hill but the two were readily dis- 
tinguished at a glance. The principal difference between the two is in the 
leaves, but this is so striking that the species can scarcely be confused. 
AMARYLLIDACEAE. 
Agave neomexicana Wooton & Standley, sp. nov. PLATE 48. 
Leaves numerous, crowded together and forming a compact, almost globose 
rosette 45 to 60 cm. in diameter when mature; leaves 10 to 30 cm. long, oblong 
