22 THE CACTACEAE. 
1. Cochemiea halei * (Brandegee) Walton, Cact. Journ. 2: 50. 1899. 
Mammillaria halei Brandegee, Proc. Calif. Acad. II. 2: 161. 1889. 
Cactus halei Coulter, Contr. U. S. Nat. Herb. 3: 106. 1894. 
Cespitose; stems nearly upright, often 30 to 50 cm. high, 5 to 7.5 cm. in diameter, almost entirely 
covered by the spines; tubercles short; axils of tubercles woolly but not setose; radial spines 10 
to 20, 10 to 12 mm. long; central spines 3 or 4, 25 mm. long, all straight; flowers central or nearly 
so, 4 to 5 cm. long; filaments yellow; stigma-lobes scarlet; fruit scarlet, 12 mm. long; seeds reticulated. 
Type locality: Magdalena Island, Lower California. 
Distribution: Islands of southern Lower California. 
This species was observed first by Mr. T. S. Brandegee in 1889, while making a botan- 
ical excursion through Lower California, and described by him the same year. It has 
been reported from only two islands off the coast of Lower California but it is there very 
abundant. It has been introduced into Europe and is sometimes offered in the trade. 
It is remarkable for its very large slender flowers. An abundance of material was collected 
by Dr. Rose in 1911. The plant does not do well in cultivation. 
The species was named for Mr. J. P. Hale, who had extensive domains in Lower Cali- 
fornia and who assisted Mr. Brandegee while making explorations in 1889. 
Tilustrations: Proc. Calif. Acad. II. 2: pl. 6; Monatsschr. Kakteenk. 5: 89; Schumann, 
Gesamtb. Kakteen 510. f. 84; Thomas, Zimmerkultur Kakteen 47, as Mammillaria hale. 
Figure 22 is from a photograph of a barren shoot of a specimen collected by C. R. 
Orcutt at Magdalena Bay, Lower California, 1917. 
2. Cochemiea poselgeri (Hildmann). 
Mammillaria poselgert Hildmann, Garten-Zeitung 4: 559. 1885. 
Mammiilaria roseana Brandegee, Zoe 2: 19. 1891. 
Mammillaria radliana Quehl, Monatsschr. Kakteenk. 2: 104. 1892. 
-~ Cactus roseanus Coulter, Contr. U. S. Nat. Herb. 3: 105. 1894. 
— Cochemiea rosiana Walton, Cact. Journ. 2: 50. 1899. 
Stems numerous from a central root, spreading or sometimes pendent from rocks or creeping 
over the ground, often 2 meters long, 4 cm. thick; areoles and upper axils white-woolly, the latter 
rarely setose; tubercles remote, somewhat flattened; radial spines 7 to 9, 9 to 12 mm. long, straw- 
colored; central spine 1, hooked, 25 mm. long; flowers appearing in the upper axils, 3 cm. long, 
scarlet; stamens and style exserted; fruit globular, 6 to 8 mm. in diameter. 
Type locality: Cape Region, Lower California. 
Distribution: At lower elevations in southern Lower California. 
This cactus, according to Mr. Brandegee, is one of the most showy of this region. 
Mammillaria longihamata Engelmann was a manuscript name taken up by Coulter 
(Contr. U. S. Nat. Herb, 3: 105. 1894) as a synonym of Cactus roseanus. 
Illustrations: Thomas, Zimmerkultur Kakteen 49; Monatsschr. Kakteenk. 2: 105, aS 
Mammillaria radliana; Garten-Zeitung 4: 559. f. 131; Schelle, Handb. Kakteenk. 246. f. 
164, as M. poselgeri. 
Plate HI, figure 3, shows a plant collected by Dr. Rose at Cape San Lucas, Lower Cali- 
fornia, which flowered in the New York Botanical Garden in 1915; figure 3a shows the 
fruit and figure 36 the seed from a plant collected by Dr. Wm. S. W. Kew near La Junta, 
Lower California, November 10, 1920. Figure 23 is from a photograph of a plant collected 
by C. R. Orcutt near Magdalena, Lower California, and sent to the Bureau of Chemistry, 
U.S. Department of Agriculture, in 1917. 
2. Cochemiea setispina (Coulter) Walton, Cact. Journ. 2: 51. 1899. 
Cactus setispinus Coulter, Contr. U. S. Nat. Herb. 3: 106 
— Mammillaria setispina Engelmann in K, Brandegee, Erythe 
Stems ascending, 30 cm. high; tubercles short; axils o 
spines 10 to 12, white with black tips, widely spreading 
spines 1 to 4, stouter than the radials, one of them str 
but probably large; fruit obovoid, 3 cm. long, 
1894. 
a5: 117. 1897. 
f tubercles woolly but not setose; radial 
unequal, 10 to 34 cm. long, slender; central 
ongly hooked; flowers not definitely known 
scarlet; seeds black and pitted. 
* Walton published this name as Cochemiea hallei. 
