| Haageocereus | |
|---|---|
 | |
| Haageocereus pseudomelanostele | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Cactaceae |
| Subfamily: | Cactoideae |
| Tribe: | Cereeae |
| Subtribe: | Trichocereinae |
| Genus: | Haageocereus Backeb. [1] |
| Type species | |
| Haageocereus pseudomelanostele | |
| Species | |
| Synonyms [1] | |
| |
Haageocereus is a genus of cacti endemic to the lower elevations of the extremely dry desert along the coast of Peru and northern Chile.
The species of the genus Haageocereus grow like a shrub to tree-like, with outstretched and creeping, lengthwise, ascending or upright shoots. The shoots usually consist of many ribs, with closely spaced areoles from which numerous thorns arise. Areoles from which flowers arise often have additional bristles.
The tubular to bell-shaped flowers are white to pink or red, open at night and remain open until the next day. The flower tube is strong and fleshy. The flower cup and the flower tube are covered with numerous scales and few to many hairs. The stamens are in a single circle.
The fleshy, spherical fruits are green to red and have a few scales and hairs. The rest of the flowers are perennial. The egg-shaped seeds are shiny black and irregularly pitted. [2]
As of October 2023 [update] , the accepted species are: [3] [1]
| Image | Scientific name | Distribution |
|---|---|---|
 | Haageocereus acranthus (Vaupel) Backeb. | Peru |
 | Haageocereus decumbens (Vaupel) Backeb. | Chile North, Peru |
 | Haageocereus fascicularis (Meyen) F.Ritter | S. Peru to Chile (Tarapacá) |
 | Haageocereus platinospinus (Werderm. & Backeb.) Backeb. | Peru |
 | Haageocereus pseudomelanostele (Werderm. & Backeb.) Backeb. | Peru |
| Haageocereus repens Rauh & Backeb. | Peru | |
| Haageocereus tenuis F.Ritter | Peru | |
 | Haageocereus versicolor (Werderm. & Backeb.) Backeb. | Peru |
| Image | Scientific name | Parentage | Distribution |
|---|---|---|---|
 | Haageocereus × comosusRauh & Backeb. | Peru | |
Acanthocalycium is a genus of cactus consisting of several species from Argentina, Bolivia, Brazil, Paraguay and Uruguay. The taxon name comes from Greek akantha and kalyx, which refers to the spines on the floral tubes.
Gymnocalycium, commonly called chin cactus, is a genus of about 70 South American species of cactus. The genus name Gymnocalycium refers to the flower buds bearing no hair or spines. In a 2023 classification of the tribe Cereeae, it was placed as the only genus in the subtribe Gymnocalyciinae, having formerly been placed in the subtribe Rebutiinae.
Browningia is a genus of cacti, comprising 11 accepted and 3 unresolved species. It is named for Webster E Browning (1869-1942), director of the Instituto Inglés, Santiago, Chile.
Brasilicereus is a genus of cacti known only from east Brazil and comprising three species.
Cephalocereus is a genus of slow-growing, columnar-shaped, blue-green cacti. The genus is native to Mexico.
Mitrocereus is a monotypic genus of cacti. Its sole species is Mitrocereus militaris, native to Mexico.
Pterocereus is a monotypic genus of cactus containing the sole species Pterocereus gaumeri.
Polaskia is a genus of tree-like cacti reaching 4–5 m high, comprising 2 species. Both present primitive characteristics, but Polaskia chichipe is nearer to Myrtillocactus while Polaskia chende is nearer to Stenocereus. The genus is found in the Mexican states of Puebla and Oaxaca.
Arthrocereus is a genus of cactus, native to southeast and west-central Brazil.
Discocactus is a genus of tropical cacti. Discocactus plants are endemic to southern Brazil, eastern Bolivia, and northern Paraguay. These species are in the risk of extinction in the wild.
Espostoopsis is a monotypic genus of cactus containing the single species Espostoopsis dybowskii. The generic name is formed from Greek opsis meaning "view", referring to its resemblance to the genus Espostoa, with which it is often confused. The plant is only known from northern Bahia, Brazil.
Rauhocereus is a monotypic genus of cacti. Its only species is Rauhocereus riosaniensis, which has nocturnal flowers. It is known from northern Peru.
Samaipaticereus is a monotypic genus of cactus containing the sole species Samaipaticereus corroanus. It is known only from East Andean Bolivia and Peru.
Weberbauerocereus is a genus of ceroid cactus, considered to be intermediate between the genera Trichocereus and Cleistocactus. The genus is named after Augusto Weberbauer because of his extensive research in the Peruvian Andes. The genus is native to Bolivia and Peru.
Brasiliopuntia is a genus in the cactus family, Cactaceae. It contains only one species, Brasiliopuntia brasiliensis.
Praecereus is genus of cactus. It is sometimes included in the genus Cereus.
Acanthocalycium thionanthum is a species of Acanthocalycium from Argentina.
Soehrensia huascha, is a species of Soehrensia in the Cactaceae family, found in north western Argentina. First published in Cactaceae Syst. Init. 29: 5 in 2013.
Soehrensia hahniana is a species of Soehrensia found in Paraguay.
Soehrensia walteri is a species of Soehrensia found in Argentina.
Media related to Haageocereus at Wikimedia Commons
Data related to Haageocereus at Wikispecies