Xerophyte

Habit

Frailea perumbilicataSN|3675]]SN|3675]] is a very small cactus that remains solitary or (occasiaonally) somewhat cespitose.

Central Spines

Usually absent, occasionally one stouter than the radials.

Roots

Fat central tap root.

Flowers

Sulphur yellow, infundibuliform, 3,4-4 cm long, often cleistogamous (Even when their flowers do not open, they still form fruits with many seeds)

Blooming Season

Flowers will open only in great heat, in the hottest, brightest, afternoon sun, if at all.

Ribs

Usually 15, divided into rounded tubercles.

Stem

It is diminutive in size, 2-3 cm high and in diameter, depressed globular and somewhat flattened and umbilicate above, (wider than taller). Dull yellowish-green, green or olive green.

Radial Spines

About 6 to 10 needle-like, twisted, spreading, more or less appressed and reflexed 2-3 mm long tannish-brow in colour.

Fruits

Dry, indehiscent, that detach easily, yellowish, pericarp membranous, fragile that break easily, releasing the seed.

Areoles

Placed on the upper side of the tubercles.