Chisos hedgehogs grow to 8 inches tall, but seldom more than 2 inches in diameter. They are usually single, but branch out occasionally above the ground. Each plant has 13–16 ribs composed of quite distinct tubercles, almost completely separated from each other by broad valleys. The surface is bluish-green to deep green. There are ten to fifteen spines growing from each areole, most of which lie flat on the stem. The flowers are about 2 1/2 inches long and 1–2 inches across and never open wide. The base of the petals is deep red followed by a pinkish-white band, with the upper portion pink to rose-colored. Stamens are cream-colored, and the pistil has several green lobes.
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