STANDLEY TREES AND SHRUBS OF MEXICO. 1007 



123, Neomammillaria dioica (K. Briindeg.) Britt. & Rose, Cactaceae 4: 158. 

 1923. 



MammiUaria dioica K. Brandeg. Erythea 5: 115. 1897. 



MammiUaria fordii Orcutt, West Anier. Sci. 13: 49. 1902. 



Northwestern Baja Califoi'nia. Southern Calilornia. 



Either solitary or clustered, cylindric, 5 to 25 cm. high or even higher ; 

 axils of tubercles woolly and short-setose ; radial spines 11 to 22, white, the 

 tips often brownish to black or rose-colored throughout, 5 to 7 mm. long, 

 spreading ; central spines 3 or 4, brownish, the lower one a little longer than 

 the otliers and hooked; flowers borne toward the top of the plant, yellowish 

 white with purplisli midrib, 10 to 22 mm. long, incompletely dioecious ; outer 

 perianth segments reddish, especially along the midrib ; the inner oblong, pale 

 cream-colored, notched or toothed near the apex ; fruit scarlet, clavate, 10 to 

 25 mm. long ; seeds black. 



124, Neoinaminillaria g-oodridgei (Scheer) Britt. & Rose, Cactaceae 4: 158. 

 1923. 



MammUlari<i goodridnei Scheer ; Salm-Dyck, Cact. Hort. Dyck. 1849. 91. 1850. 



Cedros Island and the adjacent mainland of Baja California ; type from 

 Cedros Island. 



Stems clustered, erect, globose to cylindric, up to 10 cm. long, 3 to 4 cm. 

 in diameter ; axils of tubercles not setose ; radial spines 12 to 15, spreading, 

 white, sometimes with dark tips ; central spine usually 1, white below, brown 

 above, the lower one hooked ; flowers perfect, rose-colored, 15 mm. long ; seg- 

 ments oblong, obtuse or retuse ; fruit clavate, 1.5 to 2 cm. long, scarlet, naked ; 

 seeds black, punctate. " Llavina." 



125, Neom.ammillaria zephyranthoides (Scheidw.) Britt. & Rose, Cactaceae 

 4: 159. 1923. 



MammiUaria sephyrantlioidcs Scheidw. Allg. Gartenz. 9: 41. 1841. 



MammiUaria fennelii Hopffer, Allg. Gartenz. 11: 3. 1843. 



Oaxaca. 



Depressed-globose to short-cylindric, up to 35 mm. high, 25 ram. in diameter ; 

 tubercles 6 mm. long; radial spines 14 to 18, 8 to 10 mm. long, very slender, 

 white; central spine 1 (sometimes 2), larger than the radials and hooked, at 

 first purple but in age yellowish at base; flowers large, with rotate limb and 

 exserted stamens and style; perianth segments white with red stripes. 



126, Neomammillaria carretii (Rebut) Britt. & Rose. Cactaceae 4: 160. 1923. 

 MammiUaria carretii Rebut ; Schum. Gesamtb. Kakt. 542. 1898. 



Mexico, the range not known. 



Solitary, dull green, globose, depressed, 5 to 6 cm. in diameter; tubercles 

 cylindric ; axils of tubercles naked ; radial spines 14, subulate, spreading, re- 

 curved, nearly clothing the plant, long, yellowish ; central spine 1, slender, 

 chestnut-brown, hooked ; flowers 2.5 cm. long ; inner perianth segments white, 

 streaked with rose, 



127, Neomammillaria jaliscana Britt. & Rose, Cactaceae 4: 160. 1923. 

 Type from Rio Blanco near Guadalajara, Jalisco. 



Cespitose, globose, 5 cm. in diameter, bright green ; tubercles in 13 rows, 

 4 or 5 mm. high ; radial spines 30 or more, at right angles to the tubercles ; 

 central spines 4 to 6, reddish brown, darker toward the tips, one of them 

 strongly hooked ; axils naked ; flowers purplish, 1 cm. broad. 



