Espostoopsis

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Espostoopsis
Espostoopsis dybowskii (Rol.-Gosselin) Buxbaum.jpg
Scientific classification OOjs UI icon edit-ltr.svg
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
Synonyms

Of the genus: [2]

  • GerocephalusF.Ritter

Of the species: [3]

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

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]

Contents

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. [4]

Taxonomy

The genus was first described in 1968 by Franz Buxbaum. [5] The specific epithet dybowskii honors the botanist and agricultural scientist Jean Dybowski. Its only species was first described in 1909 as Cereus dybowskii by Robert Roland-Gosselin. [6] Further nomenclature synonym are Cephalocereus dybowskii (Rol.-Goss.) Britton & Rose (1920), Austrocephalocereus dybowskii (Rol.-Goss.) Backeb. (1951), Austrocephalocereus dyhowskii (Rol.-Goss.) Backeb. (1951), Gerocephalus dybowskii (Rol.-Goss.) F.Ritter (1968) and Coleocephalocereus dybowskii (Rol.-Goss.) F.H.Brandt (1981).

The genus was formerly placed in subtribe Trichocereinae, but a 2023 molecular phylogenetic study found that it belonged to subtribe Cereinae. [7]

Distribution and habitat

Espostoopsis dybowskii is found growing in granite and quartz outcrops in northern Bahia, Brazil at altitudes of 300 to 750 meters. [8]

Related Research Articles

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References

  1. 1 2 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.
  4. ↑ Anderson, Edward F.; Eggli, Urs (2005). Das grosse Kakteen-Lexikon (in German). Stuttgart (Hohenheim): Ulmer. pp. 284–285. ISBN   3-8001-4573-1.
  5. ↑ "Au Cactus Francophone". Au Cactus Francophone (in French). Retrieved 2023-12-21.
  6. ↑ France., Société botanique de (1908). "Bulletin de la Société botanique de France". La Société. ISSN   0037-8941 . Retrieved 2023-12-21.
  7. ↑ Romeiro-Brito, Monique; Taylor, Nigel P.; Zappi, Daniela C.; Telhe, Milena C.; Franco, Fernando F. & Moraes, Evandro M. (2023). "Unravelling phylogenetic relationships of the tribe Cereeae using target enrichment sequencing". Annals of Botany. 132 (5): 989–1006. doi:10.1093/aob/mcad153.
  8. ↑ "Espostoopsis dybowskii". llifle.com. 2013-08-04. Retrieved 2023-12-21.
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