NEOMAMMILLARIA. 129 
Distribution: Western Texas and northern Chihuahua. Reported also from Arizona, 
but doubtless incorrectly. 
We have seen no specimens of N. lasiacantha, except the type, but the f ollowing species, 
first described as a variety of lasiacantha, is very common in eastern Texas and northern 
Mexico. Possibly the two should be united, the typical form simply representing a juvenile 
phase. 
Illustrations: Cact. Mex. Bound. pl. 3; Schumann, Gesamtb. Kakteen 522. f. 86; 
Engler and Prantl, Pflanzenfam. 3%: f. 56, A; Blanc, Cacti 70. No. 1 335; West Amer. Sci. 
13: 39, as Mammiullaria lasiacantha. 
2 88. Negmammillaria denudata (Engelmann). 
™ Mammillaria lasiacantha denudata Engelmann, Cact. Mex. Bound. 5. 1859. 
/ Cactus lastacanthus denudatus Coulter, Contr. U. S. Nat. Herb. 3: 100. 1894. 
} Mammillaria lasiandra denudata Quehl, Monatsschr. Kakteenk. 19: 79. 1909. 
Globose, 2.5 to 3.5 cm. in diameter; tubercles 5 to 6 mm. long; spines 50 to 80, glabrous or nearly 
so, 3 to 5 mm. long, the innermost usually much shorter; flowers and fruit from near the center but 
not from the axils of young tubercles; flowers 10 to 12 mm. long; perianth-segments few, about 12, 
oblong, obtuse, the margins white, the center light purple; stamens white; style and stigma-lobes 
green; fruit clavate, red, 1.5 to 2 cm. long; seeds black with basal hilum 
Fic. 140.—Neomammillaria lenta. 
Fic. 139.—Neomammillaria denudata. 
Type locality: Western Texas. 
Distribution: Western Texas and northern Coahuila, Mexico. __ h 
The flowers open about mid-day and close at night; in one case which we recorded the 
flowers opened for six consecutive days. blished 
Mammillaria rungii (Schumann, Gesamtb. Kakteen 522. 1898), an unpublished gar- 
den name, was supposed by Schumann to be referable to M. lasiacantha denudata. a 
Illustrations: Cact. Mex. Bound. pl. 4; Médllers Deutsche Gart. Zeit. 25: 475. ft. 8, 
No. 21, as Mammillaria lasiacantha denudata. 
Figure 139 is from a photograph of a plant col 
afterwards flowered in Washington. 
89. Neomammillaria lenta (K. Brandegee). 
Mamamillaria lenta K. Brandegee, Zoe 5: 194. 1904. . . 
Described as cespitose; individuals globose to short-cylindric, almost hidden by the white 
i i i - spine- ced; spines about 40, very fragile; 
delicate spines; tubercles very slender, light green; spine-ar eoles nake ; ; r 
axils woolly and occasionally’ bearing a single bristle; flowers whitish, 7 mm. long; perianth-segments 
pointed; fruit red, clavate; seeds 1 mm. in diameter, dull black. 
lected by Elmer Stearns in 1909, which 
