Xerophyte

Central Spines

3-4 very flattened, whitish, yellowish, brownish to almost black, often darker at the tip, directed upwards ± rigid, ferocious-looking, straight or curved, unequal with one very long (from 1 to 10 cm long) and 1-5 mm wide at the base

Seeds

1 mm long x 0,9 mm wide, pyriform to reniform, black. Head with celled and wavy wall.

Description

The standard Stenocactus arrigensSN|6244]]SN|6244]]is (syn

Flowers

Central, rather small, up to 4 cm long, funnel-shaped. Perianth segments in two series, pale pink with a purplish midrib, oblong-linear, acute. Flower tube well developed, covered with imbricating scales.

Blooming Season

Late spring to summer.

Ribs

Thin, more or less folded, very regularly and attractively waived, depressed in the region of areoles. The flattened, wavy or curled ridges of this species are characteristic of other kinds of Echinofossulocactus.

Stem

Fan shaped, up to 20 cm tall, 5-10 cm thick, bluish-green, dark matt green or dark olive-green.

Radial Spines

Usually 4 to 6 flattened, whitish to brownish, 0,5 to 1 cm long and about 0,6-1 mm wide at the base.

Fruits

8-12 mm long, 4-6 mm wide, obovoid reddish to greysh, dry at maturity.

Areoles

1 to 3 in each ribs, woolly in youth, later naked.