140 THE CACTACEAE. 
Figure 153 is from a photograph of one of the plants collected by Mr. Johnston and 
sent to Washington. 
104. Neomammillaria palmeri (Coulter). 
Cactus palmeri Coulter, Contr. U. S. Nat. Herb. 3: 108. 1894. 
Mammillaria dioica insularis K. Brandegee, Erythea 5: 115. 1897. 
Densely cespitose; individuals small; axils densely woolly and bristly; radial spines 25 to 30, 
slender, white, 5 mm. long, radiating; central spines 3 to 5, stouter and longer than the radials, 
brownish with black tips, straight, 7 to 8 mm. long; flowers cream-colored, sometimes tinged with 
pink; fruit clavate, scarlet; seeds black. 
Type locality: ‘San Benito Island.” * 
Distribution: San Benito Islands and possibly Guadalupe Island off the west coast of 
Lower California. 
Plate xiv, figure 7, shows the plant, collected on the San Benito Islands, which 
flowered in the New York Botanical Garden, April 1, 1912. 
105. Neomammillaria uncinata (Zuccarini). 
\. Mammillaria uncinata Zuccarini in Pfeiffer, Enum. Cact. 34. 1837. 
Mammillaria-bihamata Pfeiffer, Allg. Gartenz. 6: 274. 1838. 
Mammillaria depressa Scheidweiler, Bull. Acad. Sci. Brux. §: 494. 1838. 
Mammillaria uncinata biuncinata Lemaire, Cact. Gen. Nov. Sp. 96. 1839. 
~ Mammillaria uncinata spinosior Lemaire, Cact. Gen. Nov. Sp. 96. 1839. 
Mammillaria uncinata rhodacantha Hortus in Forster, Handb. Cact. ed. 2. 347. 1885. 
Cactus bthamatus Kuntze, Rev. Gen. Pl. 1: 260. 1891. ' 
Cactus depressus Kuntze, Rev. Gen. Pl. 1: 260. 1891. Not De Candolle, 1813. 
Cactus uncinatus Kuntze, Rev. Gen. Pl. 1: 261. 1891. 
Globose or somewhat depressed, usually half-buried in the soil, 8 to 10 cm. in diameter; 
tubercles lactiferous, short, obtuse; axils of old tubercles naked, of young ones lanate, forming a 
mass of wool at top; young spine-areoles also lanate; radial spines 4 to’6, usually white, subulate, 
4 to 5 mm. long; central spines usually solitary, sometimes 2 or 3, much stouter than the radials, 8 to 
12 mm. long, brown, hooked at apex; flowers small, reddish white, about.2 cm. long; inner perianth- 
segments linear-oblong; stigma-lobes pinkish; fruit clavate, 10 to 18 mm. long, red; seeds small, 
brown. 
Type locality: Mexico. 
Distribution: Common in central Mexico, especially in Hidalgo and San Luis Potosi. 
Schumann reports it from Chihuahua, as collected by Wislizenus, but we suspect that there 
is an error. Pfeiffer does not give a definite locality for this species but Zuccarini, who 
redescribed the plant soon afterwards, says that Karwinsky obtained it in the mountains 
near Pachuca, Mexico. 
This species and the following two are the only milk-bearing Neomammillaria which 
have hooked spines. 
Mammillaria adunca Scheidweiler (Forster, Handb. Cact. 222. 1846), referred here 
as a synonym, was never described. 
Illustrations: Pfeiffer and Otto, Abbild. Beschr. Cact. 1: pl. 19; Schumann, Gesamtb. 
Kakteen f. 94; Abh. Akad. Bayer. Wiss. Miinchen 2: pl. 4, f. 3; Schelle, Handb. Kakteenk. 
269. f. 191, as Mammillaria uncinata. 
> 106. Neomammillaria hamata (Lehmann). 
Cactus cylindricus Ortega, Nov. Rar. Pl. 128. 1800. Not Lamarck, 1783. 
Mammillaria hamata Lehmann in Pfeiffer, Enum. Cact. 34. 1837. 
Cactus hamatus Kuntze, Rev. Gen. Pl. 1: 260. 1891, 
_ _ Stem 6 dm. long, cylindric, somewhat branched at base, described as milky ; tubercles conic or a 
little compressed ; radial spines 15 to 20, white, spreading; central spines several, brownish, stouter 
than the radials, one of them hooked; flowers small, probably scarlet, from near top of plant but from 
* Although San Benito Island is given as the type locality, San Benito i small islands. 
Dr. Rose found this species on two of these islands in 1911 (No. 16042). ito is really a group of three 
