164 THE CACTACEAE. 
Figure 181 is a reproduction of the photograph mentioned above; figure 183 shows the 
seed and spine-cluster of the type. 
147. Neomammillaria tacubayensis (Fedde). 
Mamumnillaria tacubayensis Fedde, Nov. Gen. Sp. Ind. 1905. 443. 1905. 
Globose, 3 to 5 cm. in diameter; radial spines 35 to 40, white, 3 to 5 mm. long; central spines 
1, black, 5 to 6 mm. long, hooked; flower 1.5 cm. long. 
Type locality: Near Tacubaya, Mexico. 
Distribution: Mexico, but range unknown. 
* We know the plant only from the original description and illustration. 
Illustration: Gartenflora 53: 214. f. 33, as Mammillaria stella de Tacubaya (but 
legend placed under figure 32). 
148. Neomammillaria umbrina (Ehrenberg). 
= Mammillaria umbrina Ehrenberg, Allg. Gartenz. 17: 287. 1849. 
Cactus umbrinus Kuntze, Rev. Gen. Pl. 1: 261. 1891. 
Simple or becoming cespitose, cylindric, 10 to 12.5 cm. high, dull green; tubercles conic; 
axils of tubercles naked; radial spines 22 to 25, spreading, white, 4 to 6 mm. long; central spines 
4, 3 being 8 to 10 mm. long, one being 20 to 24 mm. long, hooked; flowers large, 2 cm. long; inner 
perianth-segments about 15, narrowly lanceolate, acute, purple; stamens numerous, described as 
connivent, white; style filiform, longer than the stamens; stigma-lobes 7, green. 
Type locality: Mexico. 
Distribution: Hidalgo, according to Schumann. 
We know this species from description only; it is peculiar in having hooked spines and 
large flowers; it resembles somewhat Neomammillaria zephyranthoides but is undoubtedly 
distinct. 
149. Neomammiillaria verhaertiana (Bédeker). 
Mammillaria verhaertiana Bodeker, Monatsschr. Kakteenk. 22: 152. 1912. 
Solitary, short-cylindric; tubercles subconic, their axils setose; radial spines 20 or more 
yellowish, setaceous, 1 cm. long, glabrous; central spines 4 to 8, stouter than the radials, brown at 
tip, one of them hooked at apex; flowers white, 2 cm. long, appearing in a circle below top of plant; 
outer perianth-segments broadly lanceolate, yellowish white; anthers rose-colored; style rose; 
stigma-lobes 8 or 9. 
Type locality: Mexico. 
Distribution: Known only from the 
type locality. 
We know the plant only from descrip- 
tions and illustrations and a few-spine-clus- 
ters sent us by L. Quehl. Bédeker placed 
it next to Mammillaria spinosissima, but 
unlike that species one of the central spines 
is hooked. 
The species is named for Francois 
Verhaert. 
Illustration: Monatsschr. Kakteenk. 
22: 153, as Mammillaria verhaertiana. 
150. Neomammillaria xanthina sp. nov. 
Depressed-globose, 7 cm. high, 8 to 9 cm. 
broad, dull bluish green; axils of tubercles and 
spine-areoles densely white-woolly when young, 
glabrate in age; tubercles lactiferous, broader 
than high, the free part about 5 mm. long, some- 
what flattened dorsally, arranged in 34 spiral 
Fic. 184.—Neomammillaria xanthina. 
