Differences between T. Pachanoi, T. Peruvianus, and T. Bridgesii
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trichocereuscultivationguide
One of the most frequently asked questions we receive is how to distinguish between the three main species of Trichocereus. Although they share many characteristics, there are clear differences that allow for their identification.
T. Pachanoi (San Pedro)
- →Ribs: 6-8, shallow and rounded
- →Spines: Short or absent in many varieties
- →Color: Bright bluish-green
- →Growth: Fast, up to 30 cm/year
- →Areoles: Small, regularly spaced
T. Peruvianus (Peruvian Torch)
- →Ribs: 6-8, deeper and more angular
- →Spines: Long and prominent, up to 4 cm
- →Color: Grayish-green with bluish hues
- →Growth: Moderate to fast
- →Areoles: Large, with abundant wool
T. Bridgesii (Achuma)
- →Ribs: 4-8, very deep
- →Spines: Variable, from short to long
- →Color: Dark green
- →Growth: Fast
- →Areoles: Large with brown wool
- →Unique characteristic: Sections that narrow and widen
In summary
If the cactus has few spines and a bluish color, it is likely a Pachanoi. If it has long and prominent spines, a Peruvianus. If the ribs are very deep and the color is dark green with variable sections, a Bridgesii.