About Pilosocereus curtisii (Otto) A.R.Franck
Pilosocereus curtisii produces green stems, which are sometimes slightly glaucous, and bear 7 to 12 ribs. Its branches are often strictly upright. Areoles on this cactus hold spines that can grow up to 7 cm (2.8 in) long. Flowering areoles have dense tufts of silky hairs reaching up to 6 cm (2.4 in) long, while non-flowering areoles have few or no such silky hairs. Fully formed flowers measure 5–7 cm (2.0–2.8 in) long. The outer flower segments (tepals) are pinkish to light green, and sometimes slightly glaucous; the inner flower segments are white to pink. It produces red fruit. This species is native to Anegada, which is part of the British Virgin Islands in the northern Leeward Islands, and to the Lesser Antilles as defined as the section of the Leeward and Windward Islands stretching from Sombrero south to Grenada.