CORYPHANTHA. 39 
1907, 1909, and 1920. It has also been sent us from the same region by O. Solis 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 g, 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 cornifera (De Candolle) Lemaire, Cactées 35. 1868. 
_ Mammillaria cornifera De Candolle, Mém. 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 scolymotdes longiseta Salm-Dyck, Cact. Hort. Dyck. 1849. 132. 1850. 
Mammillaria scolymoides nigricans Salm-Dyck, Cact. Hort. Dyck. 1849. 132. 1850. 
Echinocactus corntferus 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. Pl. 1: 260. 1891. 
Cactus pfeifferanus Kuntze, Rev. Gen. Pl, 1: 261. 1891. 
Cactus scolymoides Kuntze, Rev. Gen. Pl. 1: 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 1, 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. cornifera as suggested by Schumann. 
Mammillaria cornifera 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 M ammillaria radians Hortus. 
Illustrations: Schumann, Gesamtb. Kakteen 492. f. 81; Thomas, Zimmerkultur 
Kakteen 55; Bull. U. S. Dept. Agr. Bur. Pl. Ind. 262: pl. 1; Bliihende Kakteen 3: Pr 2 53 
Monatsschr. Kakteenk. 14: 73, as Mammillaris cornifera; Karsten and Schene , eae a- 
tionsbilder 2: pl. 20e, as Mammillaria scolymoides ; Tydschr. Nat. Geschr. 6: pl. 1, f. 2, as 
Mammillaria pfeifferana. 
Plate u1, figure 4, shows a plant collecte 
flowered in the New York Botanical Garden. 
25. Coryphantha salm-dyckiana (Scheer). k iaso. tag, 1850 
Mammillaria salm-dyckiana Scheer in Salm-Dyck, Cact. Hort. Dys JI 49. 134 . 
Mammillaria salm-dyckiana brunnea Salm-Dyck, Allg. Garteat, # > 394. 
Echinocactus salm-dyckianus Poselger, Allg. Gartenz. 21 ‘102. 53. 
Cactus salm-dyckianus Kuntze, Rev. Gen. Pl. 1: 261. 1 sor +908 
Mammillaria delaetiana Quehl, Monatsschr. Kakteenk. 18: 59. . 
Plants either solitary or in clusters, nearly globular or sometimes club shaped, sou 5 cm. in 
diameter, light green; tubercles rather short, closely set; radial spines ay O a 5: prea g, slender, 
Io to 15 mm. long, grayish or whitish; central spines 1 to 4, reddish to black, 3 
d by Dr. C. A. Purpus in Coahuila in 1905 which 
