| Mammillaria, which are short, fat and hairy, and cereus, which are tall and stately, belong to which plant family? |
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| Mammillaria are fairly common cacti although there is plenty of varietion among varieties. |
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| It turns out that this is a succulent by the name of Mammillaria compressa. |
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| Seen here is a collection of Mammillaria which left to their own devices will grow into clumps. |
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| Assessing the ecological status of Mammillaria pectinifera Weber, a rare and threatened species endemic of the Tehuacan-Cuicatlan region of central Mexico. |
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