2 2 THE CACTACEAE. 



1. Cochemiea halei * (Brandegee) Walton, Cact. Journ. 2 : 50. 1899. 



MammiUaria 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 191 1. 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. 



Illustrations: Proc. Calif. Acad. II. 2: pi. 6; Monatsschr. Kakteenk. 5: 89; Schumann, 

 Gesamtb. Kakteen 510. f. 84; Thomas, Zimmerkultur Kakteen 47, as MammiUaria halei. 



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). 



MammiUaria poselgeri Hildmann, Garten-Zeitung 4: 559. 1885. 

 MammiUaria roseana Brandegee, Zoe 2: 19. 1891. 

 MammiUaria 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 i, 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. 

 MammiUaria 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 

 MammiUaria radliana; Garten-Zeitung 4: 559. f. 131; Schelle, Handb. Kakteenk. 246. f. 

 164, as M. poselgeri. 



Plate II, 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 sctispinus Coulter, Contr. U. S. Nat. Herb. 3: 106. 1894. 

 MammiUaria setispina Engelmann in K. Brandegee, Erythea 5: 117. 1897. 



Stems ascending, 30 cm. high; tubercles short; axils of tubercles woolly but not setose; radial 

 spines 10 to 12, white with black tips, widely spreading, unequal, 10 to 34 cm. long, slender; central 

 spines i to 4, stouter than the radials, one of them strongly hooked ; flowers not definitely known 

 but probably large; fruit obovoid, 3 cm. long, scarlet; seeds black and pitted. 



* Walton published this name as Cochemiea hallei. 



