The "Crested" form of Pachycereus pringlei, commonly known as the Cardón cactus, is a unique and visually striking mutation of this species. Pachycereus pringlei is a tall and columnar cactus native to the Baja California Peninsula in Mexico and is one of the largest cacti in the world. Here are some key characteristics and information about the crested form of Pachycereus pringlei:

1. Appearance: The crested form of Pachycereus pringlei is characterized by its abnormal growth pattern. Instead of growing as a single, tall columnar stem, the crested version exhibits fan-shaped or "crested" growth. The stems are contorted and appear flattened or ribbon-like, with numerous undulating ridges and folds.

2. Growth Habit: Crested cacti are a result of a genetic mutation or injury to the growing tip of the plant. This mutation causes the cactus to produce multiple stems that grow in a fan-shaped or crest-like pattern, rather than the typical upright growth of Pachycereus pringlei.

3. Spination: The spination of the crested Pachycereus pringlei can vary, but it typically retains the spines found on the regular form of the species. These spines may be shorter or less pronounced due to the crested growth.

4. Cultivation: Crested cacti are often cultivated by cactus enthusiasts and collectors for their unique and ornamental appearance. They require well-draining soil, plenty of sunlight, and protection from frost. Due to their unusual growth habit, they make eye-catching additions to cactus gardens and collections.

5. Landscape Use: Crested cacti, including crested Pachycereus pringlei, are sometimes uséd in xeriscaping and arid landscaping to add visual interest and architectural appeal to garden designs.

6. Propagation: Crested forms of cacti can be propagated through cuttings taken from the crested portion of the plant. These cuttings can be rooted to grow new crested cacti.

7. Rare and Collectible: Crested cacti are considered rare and collectible by many enthusiasts due to their unique growth patterns. They are often sought after by collectors of unusual and visually striking cacti.

8. Maintenance: Crested cacti require relatively low maintenance, as they are adapted to arid conditions. They should be watered sparingly, allowing the soil to dry out between waterings.

Crested cacti, including the crested form of Pachycereus pringlei, are prized for their abnormal and captivating growth patterns. They make excellent additions to cactus collections and can serve as focal points in arid gardens. Their unusual appearance adds a touch of intrigue and fascination to any landscape or collection.