CORYPHANTHA. 39 



1907, 1909, and 1920. It has also been sent us from the same region by O. SoHs and 

 B. P. Reko. 



Figure 36 is from a photograph of a plant sent from Oaxaca by O. Solis in 1920. 



23. Coryphantha palmeri sp. nov. 



Plant-body globular; tubercles closely set in about 13 rows but not very regularly arranged, pale 

 green, not very flaccid ; radial spines 11 to 14, rather stout, spreading nearly at right angles to central 

 one, yellowish; tips often blackish; central spine one, stout, terete, hooked at apex; young areoles 

 very woolly; flowers central, pale yellow to nearly white, about 3 cm. long; outer perianth- segments 

 linear-oblong, acute, brownish on broad mid-rib, entire, the inner yellow throughout, acuminate; 

 stamens numerous; stigma-lobes 9, linear, cream-colored. 



Collected by Dr. Edward Palmer on stony ridge near Durango, Mexico, and flowered 

 in Washington, July 1906 (No. 557, type). Here seem to belong plants collected by 

 Dr. Palmer at Agua Nueva, April 1905 (No. 561), and at Saltillo, October 1904 (No. 438), 

 and July 1905 (No. 703), and also by F. E. Lloyd in Zacatecas, 1908 (No. 9). 



24. Coryphantha comifera (De Candolle) Lemaire, Cact6es 35. 1868. 



Mammillaria comifera De Candolle, Mem. Mus. Hist. Nat. Paris 17: 112. 1828. 

 Mammillaria pfeifferana De Vriese, Tydschr. Nat. Geschr. 6:51. 1839. 

 Mammillaria scolymoides Scheidweiler, Allg. Gartenz. 9: 44. 1841. 

 Mammillaria scolymoides longiseta Salm-Dyck, Cact. Hort. Dyck. 1849. 132. 1850. 

 Mammillaria scolymoides nigricans Salm-Dyck, Cact. Hort. Dyck. 1849. 132. 1850. 

 Echinocactus corniferus Poselger, Allg. Gartenz. 21: 102. 1853. 

 Echinocactus corniferus longisetus Poselger, Allg. Gartenz. 21 : 102. 1853. 

 Echinocactus corniferus nigricans Poselger, Allg. Gartenz. 21 : 102. 1853. 

 Echinocactus corniferus scolymoides Poselger, Allg. Gartenz. 21 : 102. 1853. 

 Cactus corniferus Kuntze, Rev. Gen. PI. i: 260. 1891. 

 Cactus pfeifferanus Kuntze, Rev. Gen. PI. i: 261. 1891. 

 Cactus scolymoides Kuntze, Rev. Gen. PI. i: 261. 1891. 



Plant solitary, globose, pale green; tubercles short, broad, somewhat imbricated, 12 cm. high; 

 radial spines 16 or 17, grayish, 10 to 12 mm. long; central spine i, stout, erect or subincurved, 

 generally dark colored, 14 to 16 mm. long; flowers yellow, tinged with red, 7 cm. broad; inner peri- 

 anth-segments oblanceolate, acuminate; fruit not seen. 



Type locality: Mexico. 



Distribution: Central Mexico. 



We refer here a plant collected by Dr. Rose near San Juan del Rio, August 17, 1905. 



Schumann referred Mammillaria scolymoides to Mammillaria radians, but its relation- 

 ship is rather with M. comifera as suggested by Schumann. 



Mammillaria comifera mutica Salm-Dyck (Cact. Hort. Dyck. 1849. 20. 1850), taken 

 up afterwards as Echinocactus corniferus muticus by Poselger (Allg. Gartenz. 21: 102. 

 1853), was without description and to it was referred Mammillaria radians Hortus. 



Illustrations: Schumann, Gesamtb. Kakteen 492. f. 81; Thomas, Zimmerkultur 

 Kakteen 55; Bull. U. S. Dept. Agr. Bur. PI. Ind. 262: pi. i; Bliihende Kakteen 3: pi. 125; 

 Monatsschr. Kakteenk. 14: 73, as Mammillaris comifera; Karsten and Schenck, Vegeta- 

 tionsbilder 2: pi. 20 e, as Mammillaria scolymoides; Tydschr. Nat. Geschr. 6: pi. i, f. 2, as 

 Mammillaria pfeifferana. 



Plate II, figure 4, shows a plant collected by Dr. C. A. Purpus in Coahuila in 1905 which 

 flowered in the New York Botanical Garden. 



25. Coryphantha salm-dyckiana (Scheer). 



Mammillaria salm-dyckiana Scheer in Salm-Dyck, Cact. Hort. Dyck. 1849. 134. 1850. 

 Mammillaria salm-dyckiana brunnea Salm-Dyck, Allg. Gartenz. 18: 394. 1850. 

 Echinocactus salm-dyckianus Poselger, Allg. Gartenz. 21: 102. 1853. 

 Cactus salm-dyckianus Kuntze, Rev. Gen. PI. i: 261. 1891. 

 Mammillaria delaetiana Quehl, Monatsschr. Kakteenk. 18: 59. 1908. 



Plants either solitary or in clusters, nearly globular or sometimes club-shaped, 10 'o 15 cm. in 

 diameter, light green; tubercles rather short, closely set; radial spines about 15, spreading, slender, 

 10 to 15 mm. long, grayish or whitish; central spines i to 4, reddish to black, the 3 upper ones when 



