Tas. 5775. 
CEREUS LIVIDUS. 
Livid Cereus. 
Nat. Ord. CacTe.—IcosanpRIA Monoeynta. 
Gen. Char. (Vide supra, Tan. 5360.) 
Cereus lividus ; erectus, robustus, plumbaceo-viridis, caule elato remote 
articulato 4-6-costato, costis compressis 1-2 poll. profundis, obtusis, rec- 
tiusculis, areolis remotis leviter depressis sublanuginosis, aculeis 6-10 
rectis rigidis, 1-3 poll. longis, brunneis; floribus 10 poll. diametro, albis, 
calycis tubo glabro, sepalis cum petalis 30-40 lineari-oblongis patentibus 
obtusis, stigmatibus ad 18. 
Cereus lividus, Pfeiffer Enum. diagn. Cact.98. Labouret Monog. Cact. 359. 
C. Perotetti, Hort. (id. Pfeiffer.) 
One of the most striking of the columnar Cacti in the 
succulent house at Kew, and procured, I believe from Germany, 
as a small plant many years ago; since which time it has at- 
tained a height of twelve feet, and diameter of four to six inches. 
Though placed by Pfeiffer (who seems to have seen young 
plants only) in the section Cereastri, with inarticulate stems, 
it will be seen from the plate that when full-grown the stem 
is distinctly articulated at regular intervals, and it should 
hence probably be referred to his section Protracti. The 
specimen here figured is the largest hitherto described, and 
flowered for the first time in June, 1868. It is a native of 
Brazil, La Guayra, and Curacoa. 
Drscr. Stem tall, erect, simple or very sparingly branched, 
twelve feet high in our specimen, with about twelve narrow 
oblong joints in that space; of a dull leaden green colour, 
five to six angled (six to eight angled at the very base); angles 
produced into thick flat straight round-edged wings or ribs, 
one to one and a half inches deep. Areole on slight depressions 
of the wings, about one to one and a half inches apart, circular, 
_ ne-quarter inch diameter, grey, velvety, bearing six to eight 
JUNE Ist, 1869. 
