Xerophyte

Description

Echinocereus rigidissimusSN|21789]]SN|8509]] is one of the most famous cactus species and a great favorite in collections. Each year’s growth is differentiated by differently coloured band of spines, hence the common name "Rainbow Cactus".

Crested Form

The crested form Echinocereus rigidissimus f. cristataSN|8509]]SN|21789]] - despite to its beauty - is still very rare and sought after by collectors, for its unique features. The more common crested form has amber/pink spines, but this plant is available in a large number of clones with spines ranging in colour from white to yellowish, pink, and purple-red. The new spines are often bright red or purple and contrast nicely with the older spines.

Flowers

Bright pink with much lighter white throat, 6-7 cm long, 6-10 cm in diameter when expanded. Perianth-segments oblong, 3 to 4 cm long, acute. Stamensnumerous, shorter than the style. Stigma lobes approx. 13 green. Areoles on ovary somewhat floccose, very spiny.

Blooming Season

It blooms in late spring summer (May-July).

Spines

No central spines.

Ribs

Low, slightly tuberculate, straight to somewhat undulate.

Stem

Fan-shaped, 4-11 cm wide, usually hidden by the closely set interlocking spines.

Radial Spines

16 to 22 stiff, rigid, pectinate, lying flat on the surface of the plant, straight or slightly curved toward stem, grey, reddish brown, bright pink or pink-and-white, somewhat translucent 5-10 mm long. Mature plants with a good light will generally have red to deep pink spines that band the stems.

Fruits

Globose, greenish or dark purplish brownish very spiny.

Areoles

Approximate almost touching or up to 2 cm apart, elliptic, 5 to 6 mm long.