This crested form of a large tree cactus can reach pretty good proportions in a container (a couple feet tall in a 12 inch pot) and will grow a few feet tall in the ground. Like the parent, it has glaucous blue-green stems with sharp spines. There is more than one version of this mutation and some may be more stable than others (which may revert to partly or fully normal stems). Remove normal growth to favor the slower crested parts. This plant is sometimes found grafted but I don't think there's any particular advantage, given it roots fast and grows perfectly fine on its own roots. It will be limited by container size, and growers put it in the ground to avoid this effect. Provide strong light for best color and form.

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