NOTES ON CACTEiE. 119 



a plant which apparently belongs here, although the lower central 

 is much flattened and longer proportionately than in the type. It 

 has not yet flowered. 



Cereus mamillatus Eugelm. in Coult. 1, c. 405. The type of 

 this is only a few cm. long and consists apparently of a rib sliced 

 off so near the surface, that the tubercles are almost disconnected, and 

 pressed quite flat from the side. Some error is to be suspected in 

 the description as to ''ribs 20-25," for it otherwise agrees well with 

 a csespitose plant brought by Captain Porter from the vicinity of 

 La Paz. It has not yet flowered. The "mamillae" in the growing 

 plant are not nearly so disconnected as is described. When the 

 plant ceases growing or dies, the intervals between the areolae be- 

 come much depressed. Notes of distance between areolse and pro- 

 jection of tubercles are of very little value, depending^ as they 

 largely do^ou the state of growth^^and the texture of the tissue of the 

 particular species. 



Cereus maritimus Jones, Am. Nat. xviii, 973, 1883. In the 

 original diagnosis the flowers are described truly as "light yellow." 

 In Professor Coulter's paper the species was redescribed, evidently 

 in ignorance of the original publication, as having "red" flowers. 

 Cereus fiavifiorus Engelm. in Coult. 1. c. 391 is without doubt the 

 same. 



Cereus Engelmanni Parry, Am. Jour. Sci., ser. 2, xiv, 338. 

 From the center of the peninsula northward in the more elevated 

 parts. It is reported from Cedros Island by Professor Greene, and 

 a short spined specimen growing in our garden is said to have come 

 from that place. These reports still require verification, the plant 

 not having been seen on the island by Mr. Anthony or by Mr. 

 Brandegee. 



Cereus polyacanthus Engelm. of Coulter's report is a doubt- 

 ful species. Mr. Orcutt's plant I have not seen. Mr. Brandegee's 

 plant from La Paz, so referred by Coulter, appears to be C. mamil- 

 latus. 



Cereus Pacificus Coult. 1. c. 397; C. phcenieeus pacificus En- 

 gelm. in Orcutt West. Am. Sci. ii. 46 (1886). The type came 

 from north of Ensenada not 100 miles below the boundary. Mr. 

 Brandegee found it on the slopes of San Pedro Martir at about 

 7,000 feet elevation. Of the plants from Comondu Cliffs, and 



