136 THE CACTACEAE. 
they are now preserved. In April 1921 Mr. Vernon Bailey rediscovered the species in 
Arizona and sent in a number of living specimens, but none has yet flowered. Mr. Orcutt 
reports that he has collected specimens which have hooked spines. 
Mr. Orcutt dedicated this species to his wife, Mrs. Olivia Orcutt. 
Figure 147 is from a photograph of two plants sent by Mr. Vernon Bailey from 
Continental, Arizona, in 1920. 
98. Neomammillaria echinaria (De Candolle). 
Mammillaria echinaria De Candolle, Mém. Mus. Hist. Nat. Paris 17: 110. 1828. 
Mammillaria echinata De Candolle, Mém. Cact. 3. 1834. 
Mammillarta gracilis Pfeiffer, Allg. Gartenz. 6: 275. 1838. 
Cactus echinaria Kuntze, Rev. Gen. Pl. 1: 260. 1891. 
Cactus gracilis Kuntze, Rev. Gen. Pl. 1: 260. 1891. Not Miller, 1770. 
Mammillaria elongata echinata Schumann, Gesamtb. Kakteen 521. 1898. 
Plants cespitose, often forming large clumps, ascending or spreading, about 1 dm. long, 1 to 1.5 
cm. in diameter; tubercles short, terete, their axils naked; spines pale yellow to glassy white; radial 
spines about 15, spreading; central spine one, straight, acicular, about 1 cm. long; flowers and fruit 
not known. 
eS 
te eo 
Fic. 148.—Neomammillaria echinaria. Fic. 149.—Neomammillaria rekoi. 
Type locality: Mexico. 
Distribution: Hidalgo, Mexico. 
The above description is based on a plant collected by Dr. Rose in 1905 near Ixmi- 
quilpan, and this we have had growing ever since. 
The two varieties of Mammillaria echinata, gracilior Ehrenberg and pallida, published 
by Forster (Handb. Cact. 239. 1846), are probably only forms of the species. 
The varieties of Mammillaria gracilis may or may not belong here. They are as 
follows: var. laetevirens Salm-Dyck (as a synonym of var. pulchella), var. pulchella Hoppfer 
and virens, all given by Forster in 1846 (Handb. Cact. 242). Mammillaria elongata centrt- 
spina (Forster, Handb. Cact. 240. 1846), which is only a name, may belong here. . 
I lustrations: Gartenflora 34: pl. 1208, f. d, e, as Mammillaria echinata. 
Figure 148 is from a photograph of the plant collected by Dr. Rose (No. 8990), 
mentioned above. 
599. Neomammillaria pottsii (Scheer). 
*Mammillaria pottstt Scheer in Salm-Dyck 
, 4 yck, Cact. Hort. Dyck. . 
=Mammillaria leona Poselger, Allg. Gartenz. 21: 94. 1853. 849. 104-1850. 
Echinocactus pottstanus Poselger, Allg. Gartenz. 21: 107. 
Cactus pottsii Kuntze, Rev. Gen. Pl. 1: 261. 1891. 1853. 
