Cactus senilis Haworth 1824
Cereus senilis (Haworth) A. P. de Candolle 1828
Pilocereus senilis (Haworth) Lamaire 1839
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Cephalocereus senilis (Haworth) Pfeiffer 1838 Bunny cactus, old man cactus, old man of Mexico, veijo, white Persian cat cactus
These cacti are natives of the Mexican states of Hidalgo and Guanajuato. Identification: Forming tall columns up to 49′ (15 m) high, and branching only at the base, these cacti make an imposing statement. Columns contain 20-30 ribs, and are up to 12″ (30 cm) in diameter. Fine white spines in groups of 20-30, are 2-4½″ (6-12 cm) long. In addition, pseudocephalia resembling very fine dense white hair appears initially on one side, then covering the entire top of each column—hence the name "old man cactus." (There is another old man cactus too though.) Funnel-shaped flowers 2½-3½″ (7-9 cm) around are pink, tinged with yellow. Fruits are roughly oval, ⅞-1″ (2.5-3 cm) around. References:
Anderson, Edward F., The Cactus Family, Timber Press, 2001, p. 140 Online References:
The University of Connecticut Ecology and Evolutionary Biology Plant Growth Facilities Dr. Giuseppe Mazza's PhotoMazza.com site Cephalocereus senilis description by Thomas H. Kent, last updated 25 May 2020.
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2/24/2010 · San Diego (Quail) Botanic Garden, Encinitas, California
8/20/2023 · Islands in the Sea of Cortez, Mexico Range:
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