Xerophyte

Flowers

Diurnal, silver-yellow, shining, outer tepals are bronze, diameter and height

Forma Aurea

The schizochromic form (Echinopsis bonnieae f. aurataSN|15820]]SN|26109]]) has pale yellow stems due to the absence (or reduced production) of chlorophyll pigments

Blooming Season

May.

Spines

About 10, pectinate pink-brown that turn grey, 1-1,5mm long.

Stem

Thin, cylindrical, yellow, usually not branched, with a constant diameter. 10(-40) cm in height, diameter 1,5-2,5cm. The apex is depressed.

Areoles

On small tubercles, arranged in about 30 spiral lines whit short white hairs.