Ferocactus emoryi subsp. rectispinus seeds grow into the straight-spined Emory's barrel cactus — a subspecies of Ferocactus emoryi (Engelm.) Orcutt native to the desert and dry shrubland biome of north-eastern Mexico. The subspecies epithet rectispinus means 'straight-spined' (from Latin rectus = straight + spinus = spine), referring to the exceptionally long, straight central spine. This subspecies holds the record for the longest spines of any cactus — the central spine can reach 25–32 cm, making them among the most dramatic spines in Cactaceae. Produces a large barrel body; 15–30 ribs; massive straight central spines to 32 cm. Cold-tolerant. Family Cactaceae.Full sun; very well-drained, rocky soils; drought-tolerant; cold-tolerant; NE Mexico desert conditions. 'Rectispinus' = straight-spined (Latin; the longest spines of any cactus — central spine to 25–32 cm — dramatic record in Cactaceae); NE Mexico; large barrel; 15–30 ribs; massive straight central spine; cold-tolerant Large barrel; 15–30 ribs; massive straight central spine to 32 cm (longest in Cactaceae!); NE Mexico; cold-tolerant NE Mexico — desert/dry shrubland biome; Ferocactus emoryi subsp. rectispinus; straight-spined; record-breaking spines to 32 cm Genus Ferocactus: SW USA to Mexico; Family Cactaceae; Order Caryophyllales Full sun; well-drained rocky soils; drought-tolerant; cold-tolerant; NE Mexico; record-length spines; Cactaceae Ferocactus emoryi subsp. rectispinus — the straight-spined Emory's barrel — holds the record for the longest spines of any cactus (to 32 cm); from north-eastern Mexico.IMPORTANT: Pictures show the adult plant, which is not for sale. The offer is only for seeds.