Trichocereus thelegonus

• Body: Dark green, prostrate, sometimes with erect branches to over 6.5' (2m.) long, to 3.1” (8cm.) diameter.
• Ribs: 12-13, broad, rounded, divided into distinctly 6 sided tubercles.
• Areoles/Spines: Circular, felted areoles. Spines brown at first, then gray, sometimes darker to blackish, sometimes yellowish. Six to 8 needle-like, more or less spreading radial spines to .8” (2cm.) long. One porrect center spine to 1.6” (4cm.) long.
• Flowers/Fruit: White flower to 8” (20cm.) long.
• Distribution: Northwestern Argentina.

Trichocereus totorensis

• Body: According to the Mesa Garden catalogue, “KK1368 'bertramiana', huge hairy white” flower.
• Ribs:
• Areoles/Spines:
• Flowers/Fruit:
• Distribution:

Trichocereus totorillanus

• Body: No description.
• Ribs:
• Areoles/Spines:
• Flowers/Fruit:
• Distribution: Bolivia.

Trichocereus trichosus

• Body: Grayish or bluish green, simple, columnar, more or less “clavate”, to only 3.2' (1m.) high.
• Ribs: 9, broad, rather obtuse, to .75” high.
• Areoles/Spines: Triangular, gray areoles to .75” (2cm.) broad, 2” (5cm.) apart (surmounted by a depression?). Spines gray, brown-tipped, thickened below, tapering to a fine point. Four to 6 radial spines to 1.4” (3.5cm.) long. One projecting central spine to 2.75” (7cm.).
• Flowers/Fruit: White flower to 9” (23cm.) long.
• Distribution: On the road between Lagunillas and Santa Cruz, Bolivia at about 2000' (600m.).