90 THE CACTACEAE. 
Type locality: Mexico. 
Distribution: San Luis Potosi, Mexico. 
We have had this plant in cultivation for a number of years; Dr. E. Palmer obtained 
it near San Luis Potosi in 1905 (No. 590); it,was also collected by Mrs. Vera from the 
same locality in 1912. 
Illustration: Martius, Nov. Act. Nat. Cur. 16: pl. 20, as Mammillaria zuccariniana. 
Figure 83 is from a photograph of a plant collected by Dr. E. Palmer near Alvarez, 
San Luis Potosi, May 1905, which afterwards flowered in Washington, D. C. 
2%. Neomammillaria formosa (Galeotti). 
_>Mammillaria formosa Galeotti in Scheidweiler, Bull. Acad. Sci. Brux. 5: 497. 1838. 
Mammillaria formosa microthele Salm-Dyck, Cact. Hort. Dyck. 1849. 87. 1850. 
Mammiillaria formosa dispicula Monville in Labouret, Monogr. Cact. 60. 1853. 
Mamamiillaria formosa gracilispina Monville in Labouret, Monogr. Cact. 60. 1853. 
Mamamiillaria formosa laevior Monville in Labouret, Monogr. Cact. 60. 1853. 
Cactus formosus Kuntze, Rev. Gen. Pl. 1: 260. 1891. 
Somewhat clavate, sunken at the apex; axils lanate; tubercles spirally arranged, obtusely 
4-angled, light green; areoles naked; radial spines 20 to 22, white, rigid, radiating; central spines 6, 
spreading, thickened at base, at first flesh-colored at base, black at tip, becoming black throughout 
or grayish; flowers red. 
Type locality: Near San Felipe. 
Distribution: San Luis Potosi, Mexico, according to Hemsley. 
Dr. Safford has referred here a plant collected by Dr. E. Palmer at San Luis Potosi 
which may be the plant which is passing under this name, but it does not seem to answer 
the original descriptions. 
Illustration: Garten-Zeitung 4: 182. f. 42, No. 11, as Mammiullaria formosa. 
. aye Lo. 
Fic. 83.—Neomammnillaria zuccariniana. Fic. 84.—Neomammillaria compressa. 
34. Neomammillaria compressa (De Candolle). 
Mammillaria compressa De Candolle, Mém. Mus. Hist. Nat. Paris 17: 112. 1828. 
Mammillaria subangularis De Candolle, Mém. Mus. Hist. Nat. Paris 17: 112. 1828. 
Mammillaria triacantha De Candolle, Mém. Mus. Hist. Nat. Paris 17: 113. 1828. 
2 Mammillaria cirrhifera Martius, Nov. Act. Nat. Cur. 16: 334. 1832. 
>Mammillaria angularis Link and Otto in Pfeiffer, Enum. Cact. 12. 1837. 
Mammillaria cirrhifera angulosior Lemaire, Cact. Gen. Nov. Sp. 95. 1839. 
Mammillaria longiseta Mihlenpfordt, Allg. Gartenz. 13: 346. 1845. 
