STANDEE V TREES AND SHRUBS OF MEXICO. 997 



74. Neomamraillaria multiceps (Salm-Dyck) Britt. & Rose, Cactaceae 4: 

 125. 1923. 



Mammillaria multiceps Salm-Dyck, Cact. Hort. Dyck. 1849. 81. 1850. 



Northeastern Mexico. Texas. 



Cespitose, often forming large clumps ; separate plants globose to short- 

 oblong, often only 1 to 2 cm. in diameter; tubercles small, terete, hairy in 

 their axils ; radial spines hairlike, white ; central spines several, pubescent, 

 yellowish at base, dark brown above ; flowers about 12 mm. long, whitish 

 to salmon-yellowish, often becoming reddish on the outside ; fruit oblong, 8 

 to 12 mm. long, scarlet ; seeds black, 1 mm. long, punctate. 



75. Neomammillaria camptotricha (Dams) Britt. & Rose, Cactaceae 4: 126. 

 1923. 



MammiUaria caniptofricha Dams, Gartenwelt 10: 14. 1905. 



Deserts of eastern Queretaro. 



Plants globose, cespitose, deep green, 5 cm. in diameter ; tubercles some- 

 what elongate, often curved, 2 cm. long, terete, not at all milky, bearing bris- 

 tles in the axils ; spines 2 to 4, described as up to as many as 8, yellowish, 

 bristle-like, spreading and twisted or bent, often 3 cm. long; spine areoles 

 small, circular, a little woolly at first ; axils of tubercles bristly ; flowers about 

 1 cm. long; outer perianth segments greenish, the inner white, 10 mm. long, 

 acute. 



76. Neomammillaria eriacantha (Link & Otto) Britt. & Rose, Cactaceae 4: 

 127. 1923. 



MammiUaria eriacantha Link & Otto; Pfeiff. Enum. Cact. 32. 1837. 



Central Mexico. 



Solitary or cespitose, 10 to 15 cm. high, cylindric, 5 cm. in diameter ; tubercles 

 spiraled, in 22 rows ; radial spines about 20, delicate, spreading, pubescent ; cen- 

 tral spines 2, widely spreading, stouter than the radials, pubescent, yellowish ; 

 flowers borne in a ring above the middle of the plant, yellow, 14 mm. broad; 

 inner perianth segments about 14, linear, acute ; fruit at first greenisli white, 

 afterwards tinged with red, short-clavate. 



77. Neomammillaria schiedeana (Ehrenb. ) Britt. & Rose, Cactaceae 4: 128. 

 1923. 



MammiUaria schiedeana Ehrenb.; Schlecht. Allg. Gartenz. 6: 240. 1838. 



fMammiUaria sericata Lem. Cact. Hort. ISIonv. 44. 1839. 



MammiUaria dumetorum Purpus, Monatsschr. Kakteenk. 22: 149. 1912. 



IMammiUaria cephaJopJiora Quehl, Monatsschr. Kakteenk. 24: 158. 1914. 



Central Mexico, the type from Puente de Dios. 



Densely cespitose, somewhat soft in texture ; axils of tubercles bearing long 

 bristle-like white hairs ; tubercles green, terete ; radial spines about 30, white, 

 spreading, bristle-like, puberulent ; central spines 6 to 10, spreading and ap- 

 pressed against the radials, a little stouter, often tinged with yellow ; flower.* 

 15 mm. long; inner perianth segments white. 



78. Neomammillaria lasiacantha (Engelm.) Britt. & Rose, Cactaceae 4: 128. 

 1923. 



MammiUaria lasiacantha Engelm. Proc. Amer. Acad. 3: 201. 18.50. 



Northern Chihuahua. Texas. 



Globose, 2 to 2.5 cm. in diameter ; tubei'cles small, their axils naked ; spines 

 40 to (iO, in more than one series, white, puberulent, 2 to 4 mm. long; flowers 

 12 mm. long, whitish or pink; fruit 1 to 2 cm. long; seeds blackish, pitted. 



