. The Cactaceae : descriptions and illustrations of plants of the cactus family. 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). 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 cm. long. Type locality: Near Tacubaya, Mexico. Distribution: Mexico, but range unknown. We know the plant only from the origin
. The Cactaceae : descriptions and illustrations of plants of the cactus family. 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). 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 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 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 i
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