Xerophyte

Central Spines

4-9, pale yellow, pinkish, reddish or grayish lavender to maroon, becoming darker with age, straight to strongly decurved; abaxial central spine porrect, spreading, 3-4 cm long.

Description

Echinomastus johnsoniiSN|14880]]SN|14880]] is a small barrel cactus densely covered by yellow, pinkish, reddish or greyish lavender to maroon spines, with flowers ranging in colour from magenta to pink to greenish yellow. The yellow-flowered plants have been named Echinomastus johnsoniiSN|14880]]SN|14880]] var. lutescens.

Flowers

Funnelform, magenta, pink, or greenish yellow , basal portions blotched with maroon, 4-6 cm long, 5-7,5 cm in diameter. Stigma lobes yellowish white to green.

Blooming Season

(Feb-) Mar-May

Ribs

(13-)17-21, strongly indented above each tubercle and then rising gradually to the next. Tubercles distinct, about 6 mm high. Areoles 15-26 mm apart along ribs; areolar glands present at least seasonally.

Stem

Usually solitary, ovoid to cylindrical, 10-25 cm high, 5-10(-15 ) cm in diameter, densely covered by spines.

Radial Spines

9-10(-16) per areole, lighter in color, spreading, 1,2-2(-4) cm long; abaxial (shortest).

Fruits

Spherical 17-18 mm green, becoming tan at maturity, dehiscing vertically only along single, longitudinal split. Fruiting Apr-Jun.Chromosome number 2n = 22.