96 



the; cactaceae. 



Illustrations: Nov. Act. Nat. Cur. i6: pi. 22; Ann. Rep. Smiths. Inst. 1908: pi. 14, 

 f. 4, as Mammillaria karwinskiana. 



Plate XI, figure 2, shows a plant collected by Dr. Rose in Oaxaca in 1906, which flowered 

 in Washington, April 16, 1907 ; plate ix, figure 2, shows a plant collected by B. P. Reko also 

 in Oaxaca, which fruited in the New York Botanical Garden in 19 18. Figure 92 is from a 

 photograph of a plant collected by Dr. Rose in Oaxaca in 1906. 



Related to this species is the following : 



Mammillaria knippeliana Quehl, Monatsschr. Kakteenk. 17: 59. 1907. 



Stem solitary, about 7 cm. high by 6 cm. in diameter, slightly depressed at apex; tubercles 

 when young pyramidal, 4-sided, 8 mm. long, their axils setose ; areoles circular, at first white- woolly, 

 soon glabrate; spines usually 6, up to 6 cm. long, whitish with blood-red or brown tips, sometimes 

 accompanied with smaller spines; flowers and native country unknown. 



Fig. 93. — Neomammillaria standleyi. 



Fig. 94. — Neomammillaria parkinsonii. 



39. Neomammillaria praelii (Miihlenpfordt). 



Mammillaria praelii Miihlenpfordt, Allg. Gartenz. 14: 372. 1846. 

 Mammillaria viridis praelii SaXm-Dyck., Cact. Hort. Dyck. 1849. 16. 1850. 

 Mammillaria viridis Saljn-Dyck, Cact. Hort. Dyck. 1849. 116. 1850. 

 Mammillaria inclinis Lemaire, lUustr. Hort. 5: Misc. 9. 1858. 

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

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



Globose, light green, sunken at the apex; axils of the tubercles lanate and setose; tubercles 

 somewhat 4-angled; spine-areoles villous; spines 4, radial, forming a cross, the uppermost and lower- 

 most elongated; flowers and fruit unknown. 



Type locality: Guatemala. 



Distribution: Guatemala. 



We do not know this species but we are following previous authors in our classification 

 of it. When flowers and fruit become known this may be subject to modification. Until 

 recently it and Neomammillaria wohurnensis were the only species of this genus known 

 from Guatemala; neither was known in cultivation. Through the eff'orts of Dr. William 

 R. Maxon, Mr. F. Eichlam, Professor Kellermann, and others, much material has been 

 collected, new species discovered, and N. woburnensis rediscovered, but not N. praelii. 



