| Pygmaeocereus bylesianus | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Cactaceae |
| Subfamily: | Cactoideae |
| Tribe: | Cereeae |
| Subtribe: | Trichocereinae |
| Genus: | Pygmaeocereus |
| Species: | P. bylesianus |
| Binomial name | |
| Pygmaeocereus bylesianus Andreae & Backeb. | |
| Synonyms [2] | |
| |
Pygmaeocereus bylesianus, synonym Haageocereus bylesianus, is a critically endangered species of cactus from Peru. [2] [1] [3]
Pygmaeocereus bylesianus has spherical to short cylindrical dark green shoots up to 8 cm (3.1 in) long and 2 cm (0.79 in) in diameter. The shoots branch from the base and form small pads. There is a fleshy tap root. The 12 to 14 ribs are initially notched and later divided into clear cusps. The 10 to 15 radiating dark thorns turn gray with age. They are 3 to 7 mm (0.12 to 0.28 in) long and usually not distinguishable into central and radial spines. Occasionally 1 to 2 cm long central spines are formed. [4] The broad, funnel-shaped, scented, white flowers are around 15 cm long. They have a very slim and long flower tube. They only last 24h and open at night. [5] The spherical fruits are red and about 15 mm (0.59 in) in size. They are thick-walled and tear open lengthways or dry up. The plants grow very slowly and in cultivation require very well-draining growth media to avoid rots. [5]
The first description was in 1957 by Wilhelm Andreae and Curt Backeberg. The epithet of the species is named after the British cactus collector Ronald S. Byles. [4]
Pygmaeocereus bylesianus is common in the Peruvian region of Arequipa at altitudes of 50 to 1000 m. This ground is extremely dry and condensation of fog is the major source of water. [5]
In the IUCN's Red List of Threatened Species, the species is classified as "Critically Endangered (CR)". [6]
Kadenicarpus pseudomacrochele, synonym Turbinicarpus pseudomacrochele, is a species of plant in the family Cactaceae.
Lobivia backebergii is a species of flowering plant in the cactus family Cactaceae, native to eastern Bolivia and southern Peru.
Armatocereus rauhii is a tall, branched columnar species of cactus endemic to the north of Peru on the western slopes of the Andes.
Gymnocalycium andreae is a species of Gymnocalycium from Argentina.
Weberbauerocereus rauhii is a species of Weberbauerocereus from Peru.
Oreocereus trollii, commonly known as the Old Man of the Andes cactus, is a species of cacti native to Argentina and Bolivia. Though listed as Least Concern by the IUCN, the plant is collected extensively, and in some areas is threatened.
Lobivia hertrichiana is a species of Lobivia found in Bolivia and Peru.
Lobivia schieliana, is a species of Lobivia found in Bolivia and Peru.
Haageocereus decumbens is a species of Haageocereus found in S. Peru to Chile (Tarapacá)
Haageocereus pseudomelanostele is a species of Haageocereus found in Peru.
Armatocereus procerus is a species of Armatocereus found in southern Peru.
Neowerdermannia chilensis is a species of Neowerdermannia found in Argentina, Bolivia, Chile, and Peru.
Browningia hertlingiana is a species of Browningia found in Peru.
Matucana weberbaueri is a species of Matucana found in Peru.
Haageocereus versicolor is a species of Haageocereus found in Peru.
Haageocereus acranthus is a species of Haageocereus found in Peru.
Oroya borchersii is a species of cacti, originating from Peru
Haageocereus platinospinus is a species of Haageocereus found in Peru.
Lobivia tegeleriana is a species of Lobivia found in Peru.
Soehrensia smrziana is a species of Soehrensia found in Argentina.
