NOTES ON CACTEJE. 117 



to very dark brown, the outer radiant, short, white, variable in 

 number, the next 5-8, brown, longer, the central row 3, two of them 

 rarely 1 or 3, strongly hooked, 2-4 cm. long, much exceeding the 

 others; fruit oval or obovate, 2-3 cm. long, scarlet, seeds black and 

 pitted. 



Description amended from numerous specimens brought from 

 Cedros Island by A. W. Anthony, and now flowering in our garden. 

 It has been collected also by Mr. Brandegee, on Natividad Island, 

 where it is even more abundant than on Cedros. 



Mamillaria (Cochmeiea) Roseana, Brandg. Zoe, ii, 19. M. 

 Radliana Quehl, Monats. f. Kakteen. ii, 104, 1892 with cut. The 

 fruit of this differs much from that of the related species. It 

 is broad, flattened at the top and shorter than the somewhat remote 

 tubercles, so that a plant in fruit looks^as if crowded with a row of 

 flat scarlet buttons pressed in between. In some specimens a single 

 stout seta is found in the axils. The spines, especially the central 

 one, vary greatly in length. This is the most widely difflised of the 

 Cochemiea, extending over the lower half of the peninsula. It is 

 found also on Santa Margarita Island and on Carmen Island. The 

 locality given for M. Radliaria is simply "Mexico." 



Mamillaria (Cochemiea) setispina, Engelm. in Coult. Cactus 

 setispinus Coult. 1. c. 106. This species is as yet only known 

 from herbarium specimens of Gabb and of Mr. Brandegee. 



It is possible^ that some of the elongated species of Mexico proper 

 will be found to belong to this section,- when the flowers are better 

 known. 



EcHiNOCACTUS viRiDESCENS Nutt. To this species belongs E. 

 limitus Engelm. in Coult. 1. c. 374, E. penmsulcB Engelm. in 

 Coult. 1. c. 361, as to "near San Diego," and also, according to Mr. 

 Orcutt, E. Orcuitii Engelm. in Orcutt, West Am. Sci. ii, 46, 1886. 



EcHiNocACTus PENINSULA Web. Bull. Mus. Hist. Nat. 1895, 

 p. 5 (reprint), E. Wislizenii Engelm. of Mr. Brandegee's list in 

 part. Echinocadus peuinsuke Engelm. in Coult. 1. c. iii, 361, as to 

 the t3'pe Gabb. No. 11, but not "near San Diego." 



It is doubtful^ if more than three species can be separated from 

 the group represented by the ill-defined and incompletely known 

 forms noted under E. Califovnica, E. viridescens, E. Oreutti, E. eyl- 

 indraceus, E. Emoryi, E. Wislizenii, E. peninsulce and their varieties. 



