412 
4 joints 10 to 12.5 em. in diameter, ascending at base and curved out- 
ward at top when mature: ribs 4 to 7 (mostly 5), with areolw remote 
on sterile joints and crowded on floriferous ones: spines on sterile joints 
stout and short (6 to 8 mm.), consisting of 4 to 6 dusky radials and a 
single shorter dusky central; on floriferous joints 10 to 20, setaceous 
and flexuous, declinate and as if pendulous (forming a reddish-gray 
beard), the longer 2.5 to 10 em.: flowers somewhat hidden in the beard, 
3.5 to 4 em. long: fruit globose, 6 to 8 mm. in diameter, with scarlet 
pulp: seed obliquely obovate, shining, 2 to 2.4 mm. long. (Jl. Cact. 
Mex. Bound. t. 74, f. 16)—Type, Schott 855 in Herb. Mo. Bot. Gard. 
From southern Arizona to the Cape region of Lower California, 
Sonora, and San Luis Potosi. 
Specimens examined: ARIZONA (Schott of 1856): SONORA (Schott 855; 
Pringle of 1884): LOWER CALIFORNIA (G@abb 7 of 1867; Palmer of 1870; 
Brandegee of 1889, San Gregorio and Comondu): SAN LUIS POTOSI 
(Eschanzier of 1891). 
A variety of local names are reported, such as ‘‘zina,” ‘sina, ” ‘‘sinita,” “hombre 
viejo,” ‘cabeza viejo, ” the latter names referring to the resemblance of the long fine 
white spines at the top of the plant to a gray head. Often used to make fences. 
79. Cereus sargentianus Orcutt, Garden and Forest, iv, 486 (1891). 
Closely related to schottii and possibly a form of it: stems in clumps 
of 8 or more, the sterile ones 6 to 15 dm. high and 5- or 6-angled, the 
fertile ones 30 to 45 dm. high and erect: spines on sterile stems much 
longer (6 to 18 mm.) and stouter, more numerous (10 or more), and 
areole closer together; the long flexuous spines of the fertile stems 
about 50 in a cluster: flowers 2.5 em. long: fruit red, spineless, edible, 
much larger than in schottii. (IU. 1. ¢. 487)—Type in Herb. Orcutt. 
Lower California. 
Specimensexamined: LOWER CALIFORNIA ( Brandegee of 1890, Cedro),. 
Mr. Orcutt reports it also from San Quintin. Confused with schottii and called by 
the same local names. 
The following West Indian species were examined, and are added as 
likely to be found in Mexico. 
80. Cereus royeni armatus Otto; Salm, Cact. Hort. Dyck. 46 (1850). 
Cereus armatus Otto; Pfeiff. Enum. 81 (1837). 
Erect, pale-green, and scarcely glaucescent, 5 to 7.5 em. in diameter, 
with 7 or 8 subcompressed ribs, broad intervals, approximate woolly 
areolw, and 8 to 17 unequal, divergent, yellowish, rigid, and slender 
spines, 6 to 10 mm. long, in an erect-spreading cluster: flowers about 3 
em. long. 
Specimens examined: CuBA (Wright 2621). 
81. Cereus pellucidus Pfeiff. Enum. 108 (1837). 
Suberect, 20 to 30 dm. high, 2.5 to 3.5 em. in diameter, branching at 
base, pellucidly green, 5-angled, with younger ribs acute (almost mem- 
branaceous), older ribs obtuse and inflated below areolke which are 8 to 
