From Backebergs Trichocereus Lexicon, T. thelegonus (Web.) Br. &R. (1)
Ba. prostrate and ± ascending, dark green; St. to 2 as long., to 8 cm 25; Ri. 12—13, broad, rounded, divided into distinctly 6-sided Tub.; Ar. round; Rap. 6—8, acicular, ± spreading, 1—2cm long.; Csp. 1, porrect, 2—4 cm long.; Sp. brown at first, then grey, sometimes darker, to blackish, sometimes yellowish; H. c. 20cm long., white, with lax light H.; Fr. c. 5 cm long., red, dehiscing laterally.—NW. Argentina (Catamarca; Tucuman).
Got this off a private collector. Both are the same plant just cut in half. Very different looking cacti ~*
Ba. prostrate and ± ascending, dark green; St. to 2 as long., to 8 cm 25; Ri. 12—13, broad, rounded, divided into distinctly 6-sided Tub.; Ar. round; Rap. 6—8, acicular, ± spreading, 1—2cm long.; Csp. 1, porrect, 2—4 cm long.; Sp. brown at first, then grey, sometimes darker, to blackish, sometimes yellowish; H. c. 20cm long., white, with lax light H.; Fr. c. 5 cm long., red, dehiscing laterally.—NW. Argentina (Catamarca; Tucuman).
Got this off a private collector. Both are the same plant just cut in half. Very different looking cacti ~*
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