ts, which fall to the ground and grow. In this way
a tuft of stems is soon developed round the first one. If these
offshoots are removed as they appear, the stem will grow longer and
stouter than it does when they are left. Tubercles small, green,
crowded; spines in a stellate tuft, short, curved, pale yellow or white.
Flowers as in M. elongata, to which this species is closely allied. In
window cases, or on a shelf in a cool greenhouse, it will grow and
multiply rapidly. Like the bulk of the caespitose, or Thimble Cactuses,
it does not make much show when in flower; and it is only its stems,
with their white stars of spines and clusters of little offsets hanging
about them, that are attractive. Native of Mexico; introduced about
1850. There is a variety known as pulchella, in which the spines are of
a yellow hue.

M. Grahami (Graham's).--A pretty little species, with globose stems,
scarcely 3 in. high, and nearly the same in diameter, branching sometimes
when old; tubercles 1/4 in. long, egg-shaped, corky when old, and
persistent. Spines in tufts of about twenty, all radiating except one in
the centre, which is hooked; they are about 1/2 in. long. Flowers 1 in.
long, usually produced in a circle round the stem. Fruit a small, oval
berry, 1/2 in. long. This is a native of Colorado, in mountainous regions.
It is very rare in cultivation. The flowers are developed in June and
July.

M. Haageana (Haage's); Fig. 62.--The habit of this is shown in the
Figure, which is reduced to about one-fourth the natural size. As the
stem gets older, it becomes more elongated. Tubercles small, four-sided
at the base, pointed at the top, where the spines are arranged in a
star, about twenty of them on each tubercle, with two central ones,
which are longer, stiffer, and much darker in colour than those on the
outside; flowers small, almost hidden beneath the spines, bright
carmine-rose; they are produced on the sides of the upper portion of the
stem in June. There is a close resemblance between this and M.
cirrhifera, and the treatment for both should be the same. Mexico, 1835.

[Illustration: FIG. 62. MAMILLARIA HAAGEANA.]

M. longimamma (long-tubercled); Fig. 63.--A well-marked species in the
size of its mammae, or tubercles, which are at least 1 in. long by 1/3 in.
in diameter, terete, slightly curved, and narrowed to a pointed apex,
the texture being very soft and watery. Each tubercle bears a radiating
tuft of about twelve spines,