. The Cactaceae : descriptions and illustrations of plants of the cactus family. APPENDIX. 271 Also add to illustrations: Zeitschr. Ges. Erdk. 1916: f. 6, in part; Contr. U. S. Nat. Herb. 16: 131, a; 132, a; Karsten and Schenck, Vegetationsbilder 13: pi. 13, asPachycereus calvus; Contr. U. S. Nat. Herb. 16: pi. 131, b, as P. titan; Ann. Rep. Smith. Inst. 1908: 553- f- 17-. (3- — Pachycereus prinfjle On page 71, vol. 11, under Pachycereus pecien-aborig-inum, add to illustrations: Engler and Drude, Veg. Erde 13: 297. f. 9; Watson, Cact. Cult. ed. 2. 246. f. 92; ed. 3. f. 17; Karsten and Schenck,
. The Cactaceae : descriptions and illustrations of plants of the cactus family. APPENDIX. 271 Also add to illustrations: Zeitschr. Ges. Erdk. 1916: f. 6, in part; Contr. U. S. Nat. Herb. 16: 131, a; 132, a; Karsten and Schenck, Vegetationsbilder 13: pi. 13, asPachycereus calvus; Contr. U. S. Nat. Herb. 16: pi. 131, b, as P. titan; Ann. Rep. Smith. Inst. 1908: 553- f- 17-. (3- — Pachycereus prinfjle On page 71, vol. 11, under Pachycereus pecien-aborig-inum, add to illustrations: Engler and Drude, Veg. Erde 13: 297. f. 9; Watson, Cact. Cult. ed. 2. 246. f. 92; ed. 3. f. 17; Karsten and Schenck, Vegetationsbilder i: pi. 48, as Cereus pecten-aboriginuni; Karsten and Schenck, Vegetationsbilder 13: pi. 14; Contr. U. S. Nat. Herb. 16: pi. 132, b. On page 71, vol. 11, under Pachycereus gaumeri, add additional characters: Ribs sometimes only 3, thin, 3 to 4 cm. high; areoles sometimes cm. apart; fruit becoming dry, globose, 3 to 4 cm. in diameter, scales at base of fruit small, becoming long and foliaceous above, fleshy at base but tips thin and soon drying black; axils of scales felted, with a cluster of about 8 very short black spines; seeds numerous, brown, 4 mm. long. The above description is drawn from specimens sent by Dr. Gaumer to Washington in June 1922. On page 73, vol. 11, under Pachycereus chrysomallus, add to illlustrations: Reiche, Elem. Bot. 226. f. 162, as Pilocereus; Mollers Deutsche Gart. Zeit. 29: 297. f. 5; U. S. Dept. Agr. Bur. PI. Ind. Bull. 262: pi. 13, f. i, as Pilocereus fulviceps; Floralia 42: 377; Belg. Hort. 3: pi. 57, as P. chrysomallus; Mollers Deutsche Gart. Zeit. 25: 473. f. 5, No. i. On page 74, vol. 11, under Pachycereus marginatus, insert: The two varieties, Cereus marginatus nionstrosus (Monatsschr. Kakteenk. 19: 62. 1909) and C. marginatus cristatus (Monatsschr. Kakteenk. 4: 194. 1894) occur in the trade. Also add to illustrations: West Amer. Sci. 13: 6; Mollers Deutsche Gart. Zeit. 25: 472. f. 2, No. 15; De Laet, Cat. Gen. f. 23;
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