Xerophyte

Flowers

Mostly deep red.

Forma Aurea

The schizochromic form (Echinopsis tiegelianaSN|20965]]SN|20965]] var. pusilla f. aurea|SN|26122]]) has pale yellow stems due to the absence (or reduced production) of chlorophyll pigments

Spines

Arranged like little spiders, cream coloured, yellowish or brownish, turning greyish eventually.

Stem

Yellow, spherical more or less flattened usually less than 4 cm tall in habitat (but often larger in cultivation). It has up to 20 ribs, with raised tubercles between which the areoles appear. The tubercles are spirally arranged on the stem's surface.