120 ERYTHEA. 



Sierra de la Laguua, the flowers are not known, and as they have 

 long stems — sometimes several feet — hanging from cliffs, the refer- 

 ence may be an error. 



Cereus Emoryi Engelm. Am. Jour. Sci. ser. 2, xiv, 338, 1852> 

 has been collected by Mr. Brandegee as far down as El Rosario, 

 but it probably extends very much farther down along the western 

 coast. 



Cereus Eruca Brandg. Proc. Cal. Acad. ser. 2, ii, 163, pi. vii, 

 1889. Of this species the flowers are still uncertain. It has been 

 growing in our garden for nearly three years ^ but has not flowered. 

 The color of the tissue of the plant is nearer orange than yellow. 

 The plant from Todos Santos,* doubtfully identified with this species 

 by Coulter, appears to be C. Brandegei. 



Cereus Schottii, at least the Lower Californian form, with C. 

 Sargentianus Orcutt, C. cochalf Orcutt and a plant from the vicinity 

 of Guaymas — perhaps C. alamosensis Coult. 1. c. 406 — form, with 

 perhaps several others, a remarkable section of Cereus distinguished 

 by numerous axillary buds. Flowei's are often produced side by 

 side as Mr. Orcutt notes, and as shown in some of Mr. Braudegee's 

 specimens of C cochal, but usually they appear in succession. Mr. 

 Brandegee notes, that "about Todos Santos C. Schottii runs into 

 some very peculiar forms, the tops of the stems differing in their 

 spines in no respect from the lower part,"| and Orcutt says, "So- 

 called 'sterile stems' produce flowers freely."§ 



Cereus Thurberi Engelm. Am. Jour. Sci., ser. ii, xvii, 234. 

 This species of the southern part of the peninsula is perhaps cor- 

 rectly identified, but I have not seen complete material from the 

 Sonoran type locality. 



Cereus Pringlei Wats. Proc. Am. Acad., xx, 368 (1885). 



Cereus pecten-aboriginum Engelm. in Wats. 1. c. xxi, 429 

 (1886). To these two species of Sonora and Chihuahua, without 



*There is apt to be some uncertainty as to the place meant by this 

 name. The Todos Santos of Mr. Brandegee's notes is between Magda- 

 lena Bay and Cape St. Lucas. Ensenada de Todos Santos, the Todos 

 Santos mentioned by Coulter under C pacificus, which is not a hundred 

 miles from San Diego, is called Ensenada. 



fMr. Orcutt, 1. c. 9, considers this identical with C. geomeirizans. 



tZoe, ii, 20. 



gOrcutt, 1. c. 29. 



