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The flowers are produced near the top of the stem; they are about ½ in. long, and rose-red in colour. Native country, Mexico. It requires the same treatment as M. cirrhifera.

Stem the size and shape of an ostrich's egg, thickly studded with small, conical tubercles, woolly at the base, the apices bearing each four spreading spines, ¾ in. long, rather stout, straight, brown when young, becoming almost white with age. Flowers numerous, small, arranged as in M. sanguinea, to which and M. cirrhifera this species is closely related.

This plant is difficult to preserve in health, the best method being that of grafting it on to a short Cereus, or a robust kind of Mamillaria, such as M. cirrhifera.

They are bright rose in colour, with orange-yellow anthers, and are developed in July. Native of Mexico. Requires the same treatment as M. cirrhifera. This is a very pretty and distinct plant, of recent introduction, and easily cultivated. It has a central stem, 6 in. high by 2 in. in diameter, conical in shape, and surrounded at the base by globose branches or offsets.

There is a close resemblance between this and M. cirrhifera, and the treatment for both should be the same. Mexico, 1835. 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.

This belongs to the same group as M. cirrhifera, but is distinguished by its large mammae, which are four-angled at the base, ¾ in. long, narrowed to a point, upon which is a tuft of wool and a cluster of about eight spines, ½ in. long, spreading, reddish-brown in colour, the central one being almost black, 1 in. long, and pointing downwards. In the axils of the mammae are tufts of white wool.