164 



THE CACTACEAE. 



Figure 181 is a reproduction of the photograph mentioned above ; figure 1 83 shows the 

 seed and spine-cluster of the type. 



147. Neomammillaria tacubayensis (Fedde). 



Mammillaria 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 

 I, 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. PI. i: 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. Neomammillaria verhaertiana (Bodeker). 



Mammillaria verhaertiana Bodeker, Monatsschr. Kakteenk. 22: 152. 1912. 



Solitary, short-cylindric; tubercles subconic, their axils setose; radial spines 20 or more 

 yellowish, setaceous, i 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- Ouehl. Bodeker placed 

 it next to Maminillaria spinosissima, but 

 unlike that species one of the central spines 

 is hooked. 



The species is named for Frangois 

 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 Fig. 184.— Neomammillaria xanthina. 



