. Carnegie Institution of Washington publication. ESPOSTOA. 61 1. Espostoa lanata (HBK.). Cactus lanatus Humboldt, Bonpland, and Kunth, Nov. Gen. et. Sp. 6: 68. 1823. Cereus lanatus De Candolle, Prodr. 3: 464. 1828. Pilocereus dautwitzn Haage, Card. Chron. 1873: 7. 1873. Pilocereus haagei Riimpler in Forster, Handb. Cact. ed. 2. 665. 1885. Pilocereus lanatus Weber, Diet. Hort. Bois 965. 1898. Cereus dautwitzii Orcutt, West Amer. Sci. 13: 63. 1902. Cleistocactus lanatus Weber in Gosselin, Bull. Mens. Soc. Nice 44: 37. 1904. Pilocereus lanatus haagei Jostmann, Monatsschr. Kakteenk. 21: 25. 1911.
. Carnegie Institution of Washington publication. ESPOSTOA. 61 1. Espostoa lanata (HBK.). Cactus lanatus Humboldt, Bonpland, and Kunth, Nov. Gen. et. Sp. 6: 68. 1823. Cereus lanatus De Candolle, Prodr. 3: 464. 1828. Pilocereus dautwitzn Haage, Card. Chron. 1873: 7. 1873. Pilocereus haagei Riimpler in Forster, Handb. Cact. ed. 2. 665. 1885. Pilocereus lanatus Weber, Diet. Hort. Bois 965. 1898. Cereus dautwitzii Orcutt, West Amer. Sci. 13: 63. 1902. Cleistocactus lanatus Weber in Gosselin, Bull. Mens. Soc. Nice 44: 37. 1904. Pilocereus lanatus haagei Jostmann, Monatsschr. Kakteenk. 21: 25. 1911. Oreocereus lanatus Britton and Rose, Stand. Cycl. Hort. Bailey 4: 2404. 1916. Plant simple, 2 to 4 meters high, sometimes with several strict branches or with a simple erect stem, 4 to 10 cm. in diameter, with many spreading branches at first nearly horizontal or curved upward and becoming erect near the tip, the tip hidden under a mass of hairs and brown bristles; ribs numerous, 20 to 25, low, 5 to 8 mm. high, rounded; areoles rather large, 5 to 6 mm. apart; radial spines numerous, acicular, 4 to 7 mm. long, brownish, intermixed with long white hairs; central spine solitary, yellow or brown to black, subulate, 2 to 5 cm. long; flowers borne on one side of the stem from a prominent pseudocephalium, to 5 cm. long; scales on the tube many, triangular- lanceolate, acute, about 6 cm. long; fruit 3 to 4 cm. long, juicy, edible, white except the small pinkish scales; seeds i mm. broad. Type locality: Near Rio Aranza and Guancabamba, Ecuador. Distribution: On the dry hills of northern Peru and Ecuador, altitude 1,200102,250 FIGS. 87 and 88.—Espostoa lanata. In 1918, while in Ecuador, Dr. Rose attempted to reach the exact locality of Humboldt's Cactus lanatus, but was unsuccessful. In the Catamayo Valley somewhat north of Humboldt's station and in what is doubtless a part of the same desert he collected this species and upon this our descrip- tion above is largely based
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