CACTI CULTIVATED UNDER THE NAME ANHALONIUM. 131 
with it. The plant illustrated in the Botanical Maga- 
zine may be considered to represent the extreme varia- 
tion in one direction, in which the tubercles are much 
shorter and more plump, and the wool-bearing apical 
areola quite prominent. In so far as I am able to gather 
any information concerning A. pulvilligerus, Lem.,* this 
seems to be the extreme variation in the contrary direction, 
in which the tubercles are distinctly prismatic and very 
much elongated. This also is described as bearing a 
prominent wool-bearing terminal areola. However, the 
presence of this areola appears to be inconstant both from 
the descriptions by different authors as well as from the 
plates, —the plate of Scheidweiler showing none. The 
figure in Blanc’s catalogue, taken from a photograph, 
shows an intermediate stage between the Botanical Maga- 
zine plate and the type, in its form of tubercles as well as 
the small areola. This figure is quite extensively copied in 
the various dealers’ catalogues both in America and Europe. 
Our own illustration shows a variation from the type 
toward A. pulvilligerus, having the same shaped tubercles, 
not prominently widening at the base, though considerably 
diminished in size. It is destitute of the terminal areola 
and in that respect and the smaller sized tubercles it ap- 
proaches more nearly the type. This plant was growing in 
the Garden at the time of Coulter’s study of the order, so 
it must have passed under his observation and been con- 
sidered to be of this species. In suggesting the probable 
identity of A. pulvilligerus with A. retusus I might add 
that in all the descriptions that I have seen of the species, 
where the color is mentioned it is given as of some shade 
of gray. Whether the color is a constant feature I am 
unable to state, though it appears to be so. If it be true, 
the gray color of the tubercle would add a point in favor 
of the union of the two species and at the same time dis- 
tinctly separate them from A. furfuraceus. — Plate 35. 
* Anhalonium pulvilligerus, Lem. Hort. Univers. 1: 275. 1839.—Anhailo- 
nium elongatum, Salm-Dyck, Cact. Hort. Dyck. 77. 1850 [2nd ed.]. 
