234 Dr. Englemannon the Cereus giganieus of California. 
with Mr. Thurber’s meagre notes, (other specimens unfortunately 
having been lost,) I have ventured to make out the following — 
description : a 
Cereus Tuursert (n. sp.): erectus, elatior, e basi ramosus sub- 
14-costatus, sulcis param profundis, aculeis brevibus nigricanti- 
bus; floribus tubuloso-campanulatis virescenti-albidis ; ovario 
globoso sepalis 80-100 carnosis squamiformibus triangularibus 
acutis imbricatis ad axillam villosis stipato ; sepalis tubi inferiori- 
bus 24 lanceolatis acutiusculis axilla nudis, superioribus 20-25 
orbiculato-obovatis obtusis ; petalis 16-20 obovato-spathulatis 0 
tusis crassis. : 
Collected in June 1851, in a rocky caiion near the mountain 
ss of Bacuachi, a small town on the road to Arispe, in Sonora; 
afterwards found with Cereus giganteus, near Santa Cruz: tt 
abounds also near Magdalena and Ures. Santa Cruz appears to 
be the northern limit of this species, which does not extend to 
the Gilariver, Stems 4 to 12 feet high, many from the same base, 
6 to 10 inches in diameter, sometimes articulated, occasionally 
branching above, with about 14 ribs and shallow grooves. Flow- 
ers greenish white, borné about a foot below the summit of the 
stem. Dried flower 22 inches long ; the tube narrower, and more 
elongated than in,C. giganieus ; the globose ovary and the naked 
and staminiferous part of the tube each about 3 inch long; free 
part of petals of the same length, and 4 lines wide. Anthers 
much larger than in the foregoing species, 1-3 to 1-4 lines long. 
Style not seen. 
I have dedicated this to the collector, Mr. George Thurber, of 
Rhode Island, an excellent botanist, who has kindly furnished me 
with the materials for this article. : 
Cereus Thurberi aud C. giganteus appear to be closely allied 
species. ‘They have high and erect stems, flowers with @ short 
tube, half of which is naked, the filaments occupying only the up 
per half of the tube; both have short and fleshy sepals on the oF 
ry, with short wool in their axils, unaccompanied by any bristles 
or spines; in both the petals are whitish, obtuse, and fleshy. ‘ 
th, and especially C. giganteus, stand very near the Piloceré 
on account of the great height of the stem, the short ventricose o 
of the flower, and the thick petals ; but they have not the z0° 
indication of a cephalium (or woolly head) nor of any particular 
development of wool; their flowers spring from the axils of f 
ordinary and unaltered areole ; and the seed is quite differeos 
at least. from that of Pilocereus senilis, the ouly species of tha 
genus, I believe, which has been well examined ; these seeds ve 
said to be obliquely thimble shaped, densely dotted, and to awe 
an embryo with thick globose cotyledons. It is also said 
the filaments cover the whole inside of the tube of the foweh 
