26 MISSOURI BOTANICAL GARDEN. 
ton. This collection has been grown by vegetative propaga- 
tion since. The last planting was made in the spring of 
1908, and plants from this setting with single-joint cuttings 
bloomed profusely the second year and at the end of the 
fourth season’s growth are about four feet high and seven to 
eight feet in diameter. It is perfectly hardy at San Antonio, 
Texas, but at the beginning of the fourth growing season 
showed signs of decay of central joints, indicating a break- 
ing down, more or less common, which precedes in many 
cases a more rapid decay resulting in the death of the main 
trunk. This simply is an indication that the species in this 
situation is not long lived. It is a common phenomenon in 
many introduced species. 
The type specimen is one prepared April 24, 1910, from a 
cultivated specimen, numbered 8374 D. G., and collected 
originally by Harmon Benton at McClenny, Florida, April 
26, 1906.—Plates 1 and 2. 
Opuntia Gregoriana, sp. nov. 
An erect, quite compactly branched, grayish green plant, a meter 
or more high, 114 meters or more in spread of branch; joints obovate, 
glaucous, with a tinge of purple about the upper marginal areoles, 
about 14 by 21 em. and again 12 by 17cm. and even smaller than this, 
uniform in general outline; areoles brown, prominent, but not protru- 
ding much, ovate to obovate, about 3 mm. long on sides of joints but 
sub-circular and often 6 mm. long on edges, even in current year’s 
growth, increasing some in size with age; spicules unequal, scattered 
through entire areole but more numerous above, variable, the longest 
about 6 mm., not increasing much after first year, often becoming 
1 cm. long at tip of joint, yellow, but sometimes brownish tinged; 
spines not numerous, confined to edges and upper areoles of joints, 
1 to 8 and at times as high as 6, yellowish or bleached, white distally 
with translucent tips and tinted bases, flattened, sometimes twisted, 
not annular or at most only very faintly so, commonly 8 em. long but 
ranging from 1 to 4 em.; flowers yellow; fruit deep purplish red all 
the way through, obovate to pyriform, slightly pitted at apex with 
sub-circular, tawny, remote areoles bearing a tuft of unequal, cen- 
trally-located spicules 3 or 4 mm. long, about 4 by 7 cm. 
The species should probably be classed with O. Engel- 
mann, but the joints are very distinct in outline and the 
spines are few in number for this group. 
