Trichocereus coquimbanus

• Body: Prostrate or decumbent to 4' (1.2m.) high forming dense thickets, stems to 4” (10cm.) diameter
• Ribs: 12-14.
• Areoles/Spines: Large, round, filled with short wool. Up to 20 spines, dissimilar sizes from .5” (12mm) to 3” (8cm.), center spine barely differentiated.
• Flowers/Fruit: Flowers to 4.75” (12cm.), white with scales of ovary and tube subtending black hairs.
• Distribution: From Coquimbo to Paposo, Chile.

Trichocereus courantii

• Body: Dull green body, erectly columnar to 13.75” (35cm.) high, although old plants can be up to 5' (1.5m.) high; stems over 2.75” (7cm.) diameter, offsetting from the base.
• Ribs: ~10
• Areoles/Spines: 9-11 radial spines, finally to 20, faded yellow to brownish; 1-4 center spines, darker and thicker below.
• Flowers/Fruit: Flower rose scented, to 9.5” (24cm.) long.
• Distribution: Bahia Blanca/Rio Negro/Rio Colorado, Argentina.

Trichocereus cuzcoensis

• Body: Densely branched body, erect to 20' (6m.), branches somewhat spreading, light green at first.
• Ribs: 7-8, low and rounded.
• Areoles/Spines: Areoles up to .6” (1.5cm.) apart. Up to 12 very stout spines, yellow, thickened below and tapering to a fine point, to 2.75” (7cm.)
• Flowers/Fruit: Flowers white, fragrant, to 5.5” (14cm.); flower tubes green to 2.5” (6cm.).
• Distribution: Cuzco region, Peru.

Trichocereus deserticolus

• Body: Branching from below, up to 5' (1.5m.).
• Ribs: 8-10, deeply incised, .6” (1.5cm.) to 1” (2.5cm.) high, with distinct furrows above the areole. See T. fulvilanus
.
• Areoles/Spines: Areoles up to .6” (1.5cm.) apart, covered with dark, wooly felt. Radial spines irregular, 15-25 thin, tapering to a fine point, dark to gray; from 1-3 center spines to 4.75” (12cm.) long, sometimes rather curving.
• Flowers/Fruit: Pure white flowers with dark wool outside to 3” (8cm.) long.
• Distribution: Near Tatal, Chile.