====== Trichocereus macrogonus — Identification ======

**T. macrogonus** is a robust, glaucous, well-spined columnar cactus — and, under modern taxonomy, the **senior name** that absorbs much of what growers call //peruvianus// and //pachanoi//.

===== At a glance =====
^ Feature ^ T. macrogonus ^
| Ribs | ~7–9, robust |
| Spines | stout, well-developed |
| Epidermis | notably glaucous (blue-green) |
| Habit | thick, erect columns |
| Native | Peru / Bolivia (Andes) |

===== A note on the name =====
Recent revisions (e.g. Ostolaza) treat **//Trichocereus macrogonus//** as the correct name for a broad group, with **//T. macrogonus var. pachanoi//** covering San Pedro and much of "peruvianus" folded in. In the hobby, "macrogonus" is still commonly used as a label for **stout, blue, well-spined** plants. Expect the boundaries between macrogonus, peruvianus and pachanoi to be blurry — they intergrade.

===== Commonly confused with =====
  * **T. peruvianus** — historically near-synonymous; provenance labels dominate.
  * **T. pachanoi** — less spiny, less glaucous, but now often treated as a variety of macrogonus.

===== Examples from our archive =====
//Community-submitted clones identified as T. macrogonus. Click a clone for its full page.//

**Matucana × macrogonus** — [[clones:m:matucana_macrogonus|full page]]
{{clones:m:media:matucana_macrogonus:070348e460dda676.jpg?260}} {{clones:m:media:matucana_macrogonus:1299af5bc836dfe2.jpg?260}} {{clones:m:media:matucana_macrogonus:295543fd5b2b12d1.jpg?260}}

**Arid Art Macro**
{{clones:a:media:arid_art_macro:30920b4454172ce7.jpg?260}} {{clones:a:media:arid_art_macro:3d2a7b0d6c95d024.jpg?260}} {{clones:a:media:arid_art_macro:759dd521b1b19aea.jpg?260}}

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//Part of the [[species:start|Trichocereus Species & ID Guide]]. This is a horticultural ID reference, **not** definitive taxonomy — Trichocereus species intergrade and their classification is debated. Example photos are community-submitted clones from our archive; click a clone for its page.//