This is one of the rarest and highly desirable of the living rock cactus, very characteristic and unmistakable. somewhat similar to Ariocarpus, it resembles an inverted green pine cone with a woolly centre.
Description: Obregonia is among the most famous of all cacti for is unique artichoke-shaped stem. It is the only representative of its monospecific genus and is related to Ariocarpus. It grows almost always as a solitary plant levelled with the ground, with the sunk and woolly apex. It is considered an intermediate form between Ariocarpus and Lophophora.
Stem: Solitary, globular-squashed resembling an inverted pine cone with a woolly centre, it grows up to 15 (or more) cm in diameter and is greyish green to dark green.
Tubercles: Arising in a rosette, not imbricate, arranged in a spiral, deeply cut like an artichoke, triangular, prominent, leaf like, flat above, keeled below and with a basal ridge.
Areoles: Small at the tips of the tubercles, with wool when young.
Spines: 2 to 4 whitish to brown about 5 to 15 mm long in the young tubercles, ± soft flexible, slightly curved and often rapidly shedding.
Roots: Thick taproot.
Flowers: The flowers grow between the wool of the apex, in the centre of the stem on young tubercles, they are funnel-shaped white diurnal, up to 2.5 cm in diameter, 2.5-3 cm long. External perianth segments greyish, pericarpel naked or with few scales. Filaments reddish purple or pink, anthers yellow, style white and stigma lobes white.
Blooming season: Summer.
Fruits: Hidden in the wool, pear-shaped, white naked, fleshy and edible that dry when mature. The withered flowers remaining attached.
Seeds: Large and black 1 to 1.4 mm long.
This is one of the rarest and highly desirable of the living rock cactus, very characteristic and unmistakable. somewhat similar to Ariocarpus, it resembles an inverted green pine cone with a woolly centre. Description: Obregonia is among the most famous of all cacti for is unique artichoke-shaped stem. It is the only representative of its monospecific genus and is related to Ariocarpus. It grows almost always as a solitary plant levelled with the ground, with the sunk and woolly apex. It is considered an intermediate form between Ariocarpus and Lophophora.Stem: Solitary, globular-squashed resembling an inverted pine cone with a woolly centre, it grows up to 15 (or more) cm in diameter and is greyish green to dark green.Tubercles: Arising in a rosette, not imbricate, arranged in a spiral, deeply cut like an artichoke, triangular, prominent, leaf like, flat above, keeled below and with a basal ridge.Areoles: Small at the tips of the tubercles, with wool when young.Spines: 2 to 4 whitish to brown about 5 to 15 mm long in the young tubercles, ± soft flexible, slightly curved and often rapidly shedding.Roots: Thick taproot. Flowers: The flowers grow between the wool of the apex, in the centre of the stem on young tubercles, they are funnel-shaped white diurnal, up to 2.5 cm in diameter, 2.5-3 cm long. External perianth segments greyish, pericarpel naked or with few scales. Filaments reddish purple or pink, anthers yellow, style white and stigma lobes white. Blooming season: Summer. Fruits: Hidden in the wool, pear-shaped, white naked, fleshy and edible that dry when mature. The withered flowers remaining attached.Seeds: Large and black 1 to 1.4 mm long.
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