APPENDIX. 269 
On page 44, vol. 1, under Cephalocereus nobilis, add the synonyms Cereus polyptychus 
Lemaire, Cact. Gen. Nov. Sp. 56. 1839; Pilocereus polyptychus Riimpler in Forster, Handb. 
Cact. ed. 2. 680. 1885. : 
Insert: The plant upon which this name was based was a small, barren one of unknown 
origin. 
Insert: Pilocereus houlletianus niger (Forster, Handb. Cact. ed. 2. 676. 1885) is only 
a name given as a synonym of P. niger, while P. niger aureus is briefly described on the 
same page. 
Add to illustrations: Méllers Deutsche Gart. Zeit. 25: 473.f.5, No.4, as Pilocereuscurtist. 
On page 47, vol. u, under Cephalocereus polygonus, add the synonym: Cephalocereus 
_ Schlumbergeri Urban, Symb. Antill. 8: 464. 1920. 
On page 49, vol. 11, under Cephalocereus lanuginosus, add the synonym: Pilocereus 
lanuginosus virens Salm-Dyck in Forster, Handb. Cact. ed. 2. 672. 1885. 
Insert: Curran reports that this fruit is edible (Inventory No. 50. p. 50. U. S. Dept. 
Agr. Bur. Plant Industry). 
On page 51, vol. 11, under Cephalocereus royenit, add to illustrations: Journ. N. Y. 
Bot. Gard. 15: pl. 133, 134. 
On page 52, vol. 11, under Cephalocereus leucocephalus, add to illustrations: Watson, 
Cact. Cult. 145. f. 56; Deutsche Gart. Zeit. '7: 312, as Pilocereus houlletianus; Gard. Chron. 
1. 29: f. 79, as P. houlletianus leucocephalus; Mollers Deutsche Gart. Zeit. 25: 473. f. 5, 
No. 14, as P. cometes; De Laet, Cat. Gén. No. 51, 52, 53; Méllers Deutsche Gart.- Zeit. 
25: 473. f. 5, No. 7; Bliihende Kakteen 2: pl. 79; West Amer. Sci. 13: 24; Schelle, Handb. 
Kakteenk. 1o1. f. 40. as P. houlletit; Gard. Chron. ll. 32: 253, as Cereus houlleti. 
On page 56, vol. 11, under Cephalocereus 
purpusit, insert: Wilhelm Weingart, under date 
of June 18, 1921, wrote of this species as 
follows: 
“Cephalocereus pur pusii sp. nov. was collected 
by C. A. Purpus in 1902 near Mazatlan, was sent 
to me February 18, 1907, and bloomed in Darm- 
stadt in 1918.” 
Figures 240 and 241 are reproduced from 
a drawing furnished by Wilhelm Weingart. 
On page 56, vol. 11, under Cephalocereus 
catingicola, add to illustrations: Vegetations- 
bilder 6: pl. 14, as Cereus catingicola; Engler, y 
Bot. Jahrb. 40: Suppl. pl. 5, as C. catingae. 
On page 58, vol. 11, insert: 
49. Cephalocereus collinsii sp. nov. 
About 3 meters high with few slender, elongated 
branches, these 3 to 4 cm. in diameter; ribs about Fics. 240, 241.—Cephalocereus purpusii, flower. 
7, obtuse; tubercles about 1.5 cm. apart, circular, 
long-woolly as well as spiny; flowering areoles not much more woolly than the others; spines 
numerous, acicular, longer ones 3 to 4 cm. long; flowers borne near ends of branches, about 5 cm. 
long; fruit somewhat depressed, about 3 cm. broad; seed shining, black, 1.5 to 2 mm. broad. 
Common in thickets near Tehuantepec, Oaxaca, Mexico. The type was collected 
by Dr. C. A. Purpus near Gerénimo in April 1923. It was reported by O. F. Cook and G. 
N.Collins from this region in 1902. The plant is named for Mr. Collins, who first brought it 
to our attention more than 20 years ago while carrying on field work in southern Mexico 
for the U. S. Department of Agriculture. 
