398 
* * * Stems short-cylindrical, 4- to 6-ribbed, jointed, procumbent: flowers purple. 
42. Cereus berlandieri Engelm. Syn. Cact. 286 (1856). 
Subterete, jointed, very branching, spreading and procumbent, with 
erect branches, joints or branches 3.5 to 15 em. long, 2 to 2.5 em, in 
diameter: ribs 5 or 6, with distinet conical tubereles and areolie 8 to 
12mm, apart: radial spines 6 to 8, setaceous, white, radiant, 8 to 10 mm. 
long; central solitary, yellowish-brown, 10 to 25 mm. long: flowers 
purple, 5 to 10 cm. long: fruit ovate, green, nearly dry, densely covered 
with mottled bristles, 18 mm. long: seed obovate-subglobose, strongly 
tuberculate, 1 mm. long. (J/l. Caet. Mex. Bound. t. 58)—Type, Ber- 
landier 2425 in Herb. Mo. Bot. Gard. 
Southeastern Texas; found originally on the Nueces. 
Specimens examined: TEXAS (Berlandier 2423; Wright 993; Haege 
of 1866): also cultivated in Breslau Bot. Gard. in 1866; in Harvard 
Bot. Gard. in 1871 and 1882; in Mo. Bot. Gard. in 1845, and growing in 
same garden in 1892 and 1893, 
Very closely allied to C. pentalophus DC., but Salm cultivated both species and con- 
idered them distinct. 
43. Cereus procumbens Engelm. Pl. Fend1. 50 (1849). 
Subterete or 4- or 5-angular, very branching and diffuse, joints or 
branches much contracted at base, 1.2 to 10 em. long, 12 to 16 mm. in 
diameter: tubercles distinct, 8 to 10 mm. apart, in 4 or 5 rows: spines 
slender, rigid, dark-tipped; radials 4 to 6 (mostly 5), white, radiant, 2 
to 4 mm. long; central solitary, stouter, dark, directed upward, 4 to 
6 mm. long, often wanting: flower delicate purple, over 7.5 cm. long: 
fruit ovate, green, 12 to 16 mm. long: seed lenticular, lightly verrucose, 
0.8 to 1.0 mm.in diameter, (JU, Cact. Mex. Bound. t. 59, f. 1-11)— 
Type, ‘‘St. Louis Volunteers” of 1846 in Herb. Mo. Bot. Gard. 
On the Rio Grande below Matamoras, Tamaulipas. 
Specimens examined: TAMAULIPAS (St. Louis Volunteers” of 1846): 
also cultivated in Harvard Bot. Gard, in 1848, 1871 and 1882; growing 
in Mo. Bot. Gard. in 1893, 
xe * Stems very slender-cylindrical, S-ribbed, erect: flowers rose-color: roots tuberous. 
44. Cereus poselgeri, nom. nov. 
Cereus tuberosus Poselger, Allg. Gart. Zeit. xxi, 135 (1853), not Pfeiff. Enum. 102 
(1837). 
Very slender from a tuberous root, terete, woody below, thickened 
upward, sparsely branching, weak, erect or reclined, joints or branches 
30 to 60 em, long, 8 to 16 mm. in diameter: ribs 8, scarcely prominent, 
with small crowded areole: spines minute and setaceous; radials 9 to 
12, white, straight and appressed, hardly 2 mm. long; central solitary 
whitish or brown-tipped or all brown or black, appressed upward, 4 to 
6 min. long: flowers rose or purple, 5 cm. long and broad: fruit nearly 
dry, covered with long wool and black and white bristles: seed obliquely 
obovate, contluently tuberculate, 0.8 mm. long. (Jil. Caet. Mex. Bound. 
t. 59, tf. 12)—Type, Poselger of 1853 in Herb. Mo. Bot. Gard. 
