| 1. | Spines, 6 to 12 of which grow from each areole.
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| 2. | Most species have at least one hooked spine at each areole.
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| 3. | Each areole produces 25 30 fine whitish spines, long.
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| 4. | Each areole also has many smaller white spines 1 or 2 centimeters long.
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| 5. | There are about 6-8 radial spines per areole which are acicular.
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| 6. | There are up to 90 on each areole.
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| 7. | Each areole bears up to 15 smooth white spines each measuring a few millimeters long.
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| 8. | In an areole, the nodes are so close together, they form a single structure.
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| 9. | Fore wing with very large areole.
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| 10. | There is a cluster of spines on each areole, surrounded by a tuft of white woolly hairs.
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