Espostoa nana F.Ritter

Description: Espostoa nana (= Espostoa melanostele subsp. nana) is a columnar cactus densely covered with white hair which distinguishes from the standard Espostoa melanostele for its smaller stems and the wool on the cephallum is white to pale yellow (mostly yellow-brown in Espostoa melanostele).
Habit: It is an attractive tall, greyish-green columnar cactus with much apical spination and pubescence.
Habit: Shrub-like reaching 1,5 m in height branching basally.
Stems: Cylindrical, green, 5-8 cm in diameter.
Ribs: About 16-2 low, blunt.
Areoles: Very numerous oval, white to yellow fairly close-set, with white to greys fine bristles or wool.
Spines: Numerous at first pale yellow.
Central spines: One.
Radial spines: 30 needle-like, shorter than the central to 8 mm long, straight, spreading.
Cephalium: Lateral, white or pale yellow.
Flowers: Bell shaped, 5-6 cm long.
Fruits: Tiny-hardly bigger than a grape (2,5-4 cmm across) bright green.

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