Haageocereus lachayensis Rauh & Backeb.

국표에 없다.

Origin and Habitat: Lomas de Lachay, South of Huacho, Lima, Peru.
Altitude: Around 100-800 metres above sea level.
Habitat: It grows in very dry coastal desert and lower stony part of canyons with fog playing a fundamental rule regarding the area's vegetation. The Haageocereus lachayensis form extensive colonies in the lower, rocky areas. The endemic bird 'cactus canastero' (Asthenes cactorum), relies on this vegetation for survival.

Description: Haageocereus lachayensis is one of the geographical form of the widespread and morphologically variable Haageocereus acranthus, of its morphological and geographical variant was early classified as different independent species, but nowadays all this plant are considered part of a multiform species, where each form is linked to others by populations of plants with intermediate characteristics. Haageocereus lachayensis has a very distinctive thick spination, spines on stem apexes are golden yellow but year after year they become more and more dark and at the base of the plant they are almost black creating an extraordinary contrast of colours.
Habit: It is a columnar succulent with upright stems which normally do not branch, but over time new stems arise from the base to form a clump.
Stems: Green erect or curving or upright, to 1-2(-3) m tall, 7-10 cm in diameter.
Ribs: 12-14 somewhat tuberculate near the stem tips.
Areoles Closely set, yellow to dark brown with yellowish woolly hairs. Flowering areoles well differentiated, woolly, white, generally disposed in ring-like pseudo- cephalia
Spines: Very coarse, continuing to grow on the trunk throughout the life of the cactus, yellow at first, then turning progressively to an almost black colouration.
Central spines: Principal central spines one, sometimes up to 3, downward pointing, very stout 2-4 cm long
Radial spines: 20-30(-40), in 2-3 series, the outermost about 1 cm long.
Flowers: Greenish white 6-8 cm long, 5-6 cm wide. Tube flared in upper half, greenish and covered by abundant white trichomes. Perianth-segments white or pale pink.
Flowering Time: Early summer.
Fruit: Round, green.

Haageocereus lachayensis (llifle.com)

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