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Trichocereus

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    Trichocereus candicans (Gillies) Britton & Rose


      Synonymity according to Britton & Rose:

        Cereus candicans tenuispinus Pfeiffer, Enum. Cact. 91. 1837.
        Cereus gladiatus Lemaire, Cact. Aliq. Nov. 28. 1838.
        Cereus candicans robustior Salm-Dyck, Cact. Hort. Dyck. 1849. 43. 1850.
        Echinocereus candicans Rümpler in Forster, Handb. Cact. ed. 2. 832. 1885.
        Echinocereus gladiatus Rümpler in Forster, Handb. Cact. ed. 2. 833. 1885.
        Echinopsis candicans Weber, Diet. Hort. Bois 471. 1896, as synonym.
        Cereus candicans courantii Schumann, Gesamtb. Kakteen 70. 1897.
        Cereus candicans gladiatus Schumann, Gesamtb. Kakteen 70. 1897.

        Schumann describes 3 varieties, all apparently from Mendoza, Which we have merged into the species. Plants as seen in the field show even greater variation than is called for in Schumann's descriptions, but they all evidently grade into one another.

        Cereus montezumae Hortus (Pfeiffer, Enum. Cact. 91. 1837, as synonym), C. dumes­nilianus Haage (Schumann, Monatsschr. Kakteenk. 4: 172. 1894, as a probable variety of C. candicans}, C. dumesnilianus Monville (Weber, Diet. Hort. Bois 279. 1894, as synonym), Echinopsis dumesniliana Cels (Schumann, Gesamtb. Kakteen 69. 1897, as synonym; C. candi-cans dumesnilianus Zeissold, Monatsschr. Kakteenk. 3: 140. 1893), and Echinocereus candi-cans tenuispinus Pfeiffer (Förster, Handb. Cact. ed. 2. 833. 1885) are usually referred here.
        Echmocactus candicans (Pfeiffer, Enum. 91. 1837) is a synonym only.
        Cereus candicans spinosior Salm-Dyck (Walpers, Repert. Bot. 2:276. 1843), undescribed, belongs here.

        Schumann refers Echmocactus auratus Pfeiffer (Abbild. Beschr. Cact. 2: under pi. 14. 1846 to 1850) and its synonym Echinopsis amata Salm-Dyck (Cact. Hort. Dyck. 1849. 39. 1850) to Cereus candicans, but this can not be, for the descriptions are very different. The former was described as depressed, 12 to 15 inches in diameter, only 4 to 5 inches high, and with 28 ribs. The type locality was Bellavista, Chile. It should be compared with Eriosyce sandillon and its relatives.*
        Echinopsis dumeliana Cels (Salm-Dyck, Cact. Hort. Dyck. 1849. 39. 1850) is given as a synonym only; it is doubtless the name referred to by Schumann, but with different spelling.