Xerophyte

Central Spines

1, very long ( 9-25 cm long × 2.5-4 mm. in cross section ), never hooked (or slightly hooked, but only on relatively young plants), roughly cylindrical, annulate, all robust and rigid. Reddish, reddish grey, or horn coloured.

Seeds

2 mm in diameter, black.

Description

Ferocactus rectispinusSN|21500]]SN|21500]] is a solitary barrel cactus except in case of injury to the growing tip.

Flowers

Large, light yellow, 6-7.5 long, 5-7.5 cm in diameter.

Blooming Season

Summer.

Ribs

15-21, shallowly notched immediately above each areole.

Stem

Erect, globular when young to a stout cylinder when older, 30-200 tall, 30-60 cm across; tubercled when young later forming ribs.

Radial Spines

5 to 9, spreading, not hooked, 2.5 to 7 cm long, with the upper 3 larger.

Fruits

Persistent, oblong, scaled, 2,5-5cm long × 25-35 mm long in diameter with the dried remains of the flower atop, ± readily dehiscent through basal pore, bright yellow.

Areoles

Oval with brown wool, 3-4 cm apart.