96 THE CACTACEAE. 
Illustrations: Nov. Act. Nat. Cur. 16: pl. 22; Ann. Rep. Smiths. Inst. 1908: pl. 14, 
f. 4, as Mammillaria karwinskiana. 
Plate x1, figure 2, shows a plant collected by Dr. Rose in Oaxaca in 1906, which flowered 
in Washington, April 16, 1907; plate 1x, figure 2, shows a plant collected by B. P. Reko also 
in Oaxaca, which fruited in the New York Botanical Garden in 1918. 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. 
Fic. 93.—Neomammillaria standleyi. Fic. 94.—Neomammillaria parkinsonii. 
39. Neomammillaria praelii (Miihlenpfordt). 
Mammillaria praelit Mithlenpfordt, Allg. Gartenz. 14: 372. 1846. 
Mammillaria viridis praelit Salm-Dyck, Cact. Hort. Dyck. 1849. 16. 1850. 
Mammillaria viridis Salm-Dyck, Cact. Hort. Dyck. 1849. 116. 1850. 
Mammillarta inclinis Lemaire, Illustr. Hort. 5: Mise. 9. 1858. 
Cactus praelit Kuntze, Rev. Gen. Pl. 1: 261. 1891. 
Cactus viridis Kuntze, Rev. Gen. Pl. 1: 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 lowet- 
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 woburnensis were the only species of this genus known 
from Guatemala; neither was known in cultivation. Through the efforts 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. praelit. 
