Subspecies, varieties, forms and cultivars of plants belonging to the Eriosyce taltalensis group

• Delaetia woutersiana Backeb.: has bristly more or less tortuous spines (= Eriosyce taltalensis subs. paucicostata). Distribution: Antofagasta?
• Delaetia woutersiana cv. Thin Petals (Backeb.): is an odd (monstrous) cultivars with very fine petals, cut into shreds. The flowers look quite different, but nice and bi-coloured, yellow and orange-red.
• Eriosyce cachytayensis hort.: Possibly a synonym of Eriosyce taltalensis, Erisyce paucicostata or Eriosyce neohankeana. Origin: Unknown.
• Eriosyce eriocephala (Backeb.): It may be recognized for the long white hairs under the flowers (particularly conspicuous in mature flowering specimens).
• Eriosyce intermedia (F.Ritter): Smaller form very similar, if not the same, to Eriosyce taltalensis var. pygmaea. Distribution: Chañaral.
• Eriosyce pulchella (Backeb.): Smaller form with white to pink flowers. It is not easily distingushable from Eriosyce taltalensis var. pygmaea. Distribution: Chañaral to Caldera.
• Eriosyce taltalensis (Hutchison) Katt.: (subsp. taltalensis) it is a variable species that has straight spines, red, pink, cream, or white flowers, and comprises two varieties. var. taltalensis has red or cream flowers; var. pygmaea has white or pink flowers.
• Eriosyce taltalensis subs. echinus (F.Ritter) Katt.: is a fiercely spined species, that has flowers white below, fuchsia red above, and comprises two varieties. var. echinus has stem tips with short wool; var. floccosa has stem tips with long tufts of wool.
• Eriosyce taltalensis var. floccosa (F.Ritter) Katt.: has stem tips with long tufts of wool.
• Eriosyce taltalensis subs. paucicostata (F.Ritter) Katt.: has grey-blue or grey-purple stems often cylindrical 6-8 cm in diameter and 15-30cm long with only 8-12 ribs. Flowers pale pink, cream-white or pale yellowish.
  
• Eriosyce taltalensis subs. paucicostata f. viridis (F.Ritter): The “viridis” form has grass green bodies with 10-13 ribs (whereas the standard form generally has grey-blue-green or grey-purple tinged stems) .
• Eriosyce taltalensis subs. pilispina (F.Ritter) Katt.: has twisted spines and white flowers.
• Eriosyce taltalensis var. pygmaea (F.Ritter) Katt.: has smaller stems and distinctive pale white to pink flowers. Distribution: North of Chañaral.