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 diaica 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 Cahfomia. 



Plate XIV, figure 7, shows the plant, collected on the San Benito Islands, which 

 flowered in the New York Botanical Garden, April i, 19 12. 



105. Neomammillaria uncinata {Zuccarini). 



ilammillaria uncitiala Zuccarini in PfeifFer, Enum. Cact. 34. 1837. 

 Mammillaria bihamata Pfeiffer, Allg, Gartenz. 6: 274. 1838. 

 Mammillaria depressa Scheidweiler, Bull. Acad. Sci. Brux. 5: 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 bihamatus Kuntze, Rev. Gen. PI. i: 260. 1891. 



Cactus depressus Kuntze, Rev. Gen. PI. 1: 260. 1891. Not De Candolle, 1S13. 

 Cactus uncinatus Kuntze, Rev. Gen. PI. i: 261. 1891. 



Globose or somewhat depressed, usually hah-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 solitan,-, 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 peiianth- 

 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 WisHzenus, 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. 



Mainmillaria adunca Scheidweiler (Forster, Handb. Cact. 222. 1846), referred here 

 as a s}Tionym, was never described. 



Illustrations: Pfeiffer and Otto, Abbild. Beschr. Cact. i: pi. 19; Schumann, Gesamtb. 

 Kakteen f. 94; Abh. Akad. Bayer. Wiss. Miinchen 2: pi. 4, f. 3; ScheUe, Handb. Kakteenk. 

 269. f. 191, as Mammillaria uncinata. 



106. Neomammillaria hamata (Lehmann). 



Cactus cylindricus Ortega, Nov. Rar. PI. 128. 1800. Not Lamarck, 1783. 

 Mammillaria hamata Lehmann in Pfeiffer, Enum. Cact. 34. 1837. 

 Cactus hamatus Kuntze, Rev. Gen. PI. i: 260. 1891. 



Stem 6 dm. long, cylindric, somewhat branched at base, described as milky; tubercles conic or a 

 httle 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 tj"pe locality, San Benito is reallj' a group of three small islands. 

 Dr. Rose found this species on two of these islands in 191 1 (No. 16042). 



