Rapicactus beguinii aka Rapicactus Beguinii

Rapicactus beguinii is a cactus from northeastern Mexico. Kew puts it in Cactaceae, the cactus family. It calls the plant a succulent subshrub. Its broad range of wild sites includes desert and dry scrub. LLIFLE gives a wider range that reaches into central Mexico. It lists Coahuila, Zacatecas, San Luis Potosí, and Hidalgo. These records place its native range in Mexico, not Britain. The RHS says it is not native to Britain or Ireland.

The sources use several names for the same plant. LLIFLE links Rapicactus beguinii with two other names. These are Thelocactus beguinii and Turbinicarpus beguinii. It treats this same taxon as Turbinicarpus mandragora subsp. beguinii. It also lists Neolloydia glassii as a name for it. These names show different ways to group the same plant. The RHS uses Thelocactus beguinii but marks the name as unresolved. Keep this in mind when matching labels with care records. Pages on other named subspecies do not describe this taxon.

LLIFLE reports small groups spread across sites in the mountains. It lists warm grasslands, pine woods, and scrub as wild sites. These lie about 6,230–6,890 feet [1,900–2,100 metres] above sea level. The plants grow in lime-rich soil with much organic matter. This means the ground holds much material from living things. The soil is mildly alkaline, or just above neutral. This adds detail to Kew's broad account of dry sites. It shows that some of the sites have woods, too. Neither source states how much light garden plants need. Wild soil records alone do not give a potting mix recipe.

LLIFLE says these sites can be hard to reach. It names fire as the main threat to them. The supplied species pages give no formal rating of extinction risk. They give no garden care guide for this species, either. They do not state its full height, width, or growth rate. Nor do they describe its stems, flowers, or fruit. The full notes on spines, blooms, and watering cover other subspecies. Those details cannot safely fill the gaps for this plant. No supplied evidence for this species sets frost limits or watering needs. Nor do the records show if it is food or toxic. Its identity, range, and wild sites remain the best-supported facts.