Summary ⁸

Cereus hildmannianus is a species of cactus from southern South America. Its distribution is uncertain but probably includes Brazil, Paraguay, Uruguay and Argentina.

Description ⁹

Cereus hildmannianus has a tree-like growth habit with a distinct trunk after which it branches freely up to 10 m (33 ft) high. Its stems are up to 15 cm (6 in) across, have 4–6 ribs and are divided into segments. The cylindrical, segmented, blue-green to cloudy green shoots are often blue-green in colour when young, becoming duller green with age. Stems are usually spineless (except in subspecies uruguayensis). They have a diameter of up to 15 centimeters. There are four to six sharp-edged ribs that are up to 3.5 centimeters high. The areoles on it are small. Thorns are usually not formed.

The white flowers are very large, up to 25–30 cm (10–12 in) long, and are followed by fruits which are red when ripe. Flowering appears when the plant is around 5 to 6 years old and is abundant during summer nights. The spherical fruits are colored red to yellow. They contain a white pulp .

Cultivation ⁹

It is necessary to water abundantly during the period of growth, and very little during the period of rest. The species can tolerate some cold, even a few degrees below zero, if the soil is dry. Young plants need shade, while adults need full sun.

Distribution ⁹

Cereus hildmannianus is thought to be widespread in Brazil, Mato Grosso do Sul, Paraguay, Uruguay, Bolivia and Argentina.

It is found in sandy, rocky soils, outcrops and on cliffs. It eventually occurs as an epiphyte over trees and shrubs. It blooms from October to February. The flower is nocturnal and closes in the morning. All parts of the plant are edible by the fauna. In Rio Grande do Sul, it is used as an ornamental and the fruits are appreciated by the population. It is commonly used by birds to build nests.

Sources and Credits

1. (c) Jaiane, some rights reserved (CC BY-NC), uploaded by Jaiane
2. (c) Adriana Nelly Correa Sandoval, some rights reserved (CC BY), uploaded by Adriana Nelly Correa Sandoval
3. (c) Martín Sánchez Vilchis, some rights reserved (CC BY-SA), uploaded by Martín Sánchez Vilchis
4. (c) Eduardo Castillo, some rights reserved (CC BY-NC), uploaded by Eduardo Castillo
5. (c) monica_montelongo, some rights reserved (CC BY-NC)
6. (c) Pablo González Maldonado, some rights reserved (CC BY-NC), uploaded by Pablo González Maldonado
7. (c) Daniela Guzmán, some rights reserved (CC BY-NC), uploaded by Daniela Guzmán
8. Adapted by Jeny Davis from a work by (c) Wikipedia, some rights reserved (CC BY-SA), https://en.wikipedia.org/wiki/Cereus_hildmannianus
9. (c) Wikipedia, some rights reserved (CC BY-SA), https://en.wikipedia.org/wiki/Cereus_hildmannianus

More Info

• iNat taxon page
• African Plants - a photo guide
• Atlas of Living Australia
• Biodiversity Heritage Library
• BOLD Systems BIN search
• eFloras.org
• Flora of North America (beta)
• Global Biodiversity Information Facility (GBIF)
• HOSTS - a Database of the World's Lepidopteran Hostplants
• IPNI (with links to POWO, WFO, and BHL)
• NatureServe Explorer 2.0
• SEINet Symbiota portals
• Tropicos
• USDA PLANTS database
• World Flora Online

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