Xerophyte

Central Spines

3-4, up to 6(-12) cm long.

Seeds

Cap-shaped, nearly as broad as long, black, finely areolate-papillale.

Description

Rebutia fidaianaSN|14924]]SN|14924]], much better known under its old name Weingartia fidaianaSN|14930]]SN|14930]], is a very spiny and usually simple cactus sometime branched.

Flowers

One per areole nearly apical, approx 4- 5 cm tall 3,5-4,5 cm in diameter, narrow funnel-shaped with short tube, tepals yellow (occasionally white, ochre or red) with a neat staminal throat ring.

Blooming Season

Spring to early summer and remain open for five or six days.

Spines

Very dense, acicular, straight or curved, spreading or bundled, thin, rigid to somewhat elastic, interlacing and almost completely covering the stem, not easily distinguishable as centrals and radials creamy-grey, straw-coloured, brownish or black.

Ribs

7-10, completely divided into round spiraling tubercles.

Stem

About 10 to 30(-70) cm tall, 6 to 20 cm in diameter, spherical to short-columnar, yellowish-green to grey-green to purple tinged and connected though a thin neck to the strong tuberous root.

Radial Spines

7-9 similar to the central up to 4(-7) cm long.

Fruits

Small, depressed spherical-ovoidal or teardrop-shaped, olive green, reddish or tannish-brown, thin-skinned and dry at maturity, dehiscing basally or on the side, with few seeds.

Areoles

Large, felted and somewhat raised.