Espostoopsis

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.[1]

Espostoopsis
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cereeae
Subtribe: Cereinae
Genus: Espostoopsis
Buxb.
Species:
E. dybowskii
Binomial name
Espostoopsis dybowskii
(Rol.-Goss.) Buxb.
Synonyms

Of the genus:[2]

  • Gerocephalus F.Ritter

Of the species:[3]

  • Austrocephalocereus dyhowskii (Rol.-Goss.) Backeb.
  • Cephalocereus dybowskii (Rol.-Goss.) Britton & Rose
  • Cereus dybowskii Rol.-Goss.
  • Coleocephalocereus dybowskii (Rol.-Goss.) F.H.Brandt
  • Gerocephalus dybowskii (Rol.-Goss.) F.Ritter

Description

Espostoopsis dybowskii grows shrubby and branches from the ground, reaches heights 2 to 4 meters. Their cylindrical trunks have 20 to 28 ribs, reaches up to a diameter of 8 centimeters and completely covered by white hairs. The areoles are covered with dull, yellowish wool and abundant white hairs. The 2 to 3 protruding, needle-like central spines are yellow and 2 to 3 centimeters long. The numerous, short and thin radial spines are hidden in the hairs of the areoles. The cephalium arises laterally and has a length of up to 60 centimeters.

The flowers are white and short tubular to bell-shaped, open at night and are up to 4 centimeters long. The flower tube covered with very small scales. The fruits are almost glabrose, pink fruits with persistent, blackening flower remains are broadly ovate in shape and have a diameter of up to 2.5 centimeters. Fruits contain white flesh and do not tear open. The black, rough-warty seeds are oval to pear-shaped.

References
  1. Taylor, N.P. (2017). "Espostoopsis dybowskii". IUCN Red List of Threatened Species. 2017: e.T40933A121501760. doi:10.2305/IUCN.UK.2017-3.RLTS.T40933A121501760.en. Retrieved 18 November 2021.
  2. "Espostoopsis Buxb." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-10-08.
  3. "Espostoopsis dybowskii (Rol.-Goss.) Buxb." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2023-10-08.



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