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: pi. 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. 



33. Neomammillaria formosa (Galeotti). 



Mammillaria jormosa Galeotti in ScheidweUer, Bull. Acad. Sci. Brux. 5: 497. 1838. 

 Mammillaria formosa microthele Salm-Dyck, Cact. Hort. Dyck. 1849. 87. 1850. 

 Mammillaria formosa dispicula Monville in Labouret, Monogr. Cact. 60. 1853. 

 Mammillaria formosa gracilispina Monville in Labouret, Monogr. Cact. 60. 1853. 

 Mammillaria formosa laevior Monville in Labouret, Monogr. Cact. 60. 1853. 

 Cactus formosus Kuntze, Rev. Gen. PI. i: 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 Mammillaria Jormosa. 



l"iG. S3. — Neomammillaria zuccariniana. 



Fig. S4. — Xeomammillaria compressa. 



34. Neomammillaria compressa (De CandoUe). 



Mammillaria compressa De CandoUe, Mem. Mus. Hist. Nat. Paris 17: 112. 1828. 

 Mammillaria subangularis De CandoUe, Mem. Mus. Hist. Nat. Paris 17: 112. 1828. 

 Mammillaria triacantha De CandoUe, Mem. Mus. Hist. Nat. Paris 17: 113. 1828. 

 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 Miihlenpfordt, AUg. Gartenz. 13: 346. 1845. 



