| Espostoopsis | |
|---|---|
_Buxbaum.jpg) | |
Scientific 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 | |
| Synonyms | |
Of the genus:[2]
Of the species:[3]
| |
Espostoopsis is amonotypic genus ofcactus containing the singlespeciesEspostoopsis dybowskii. The generic name is formed fromGreekopsis meaning "view", referring to its resemblance to the genusEspostoa, with which it is often confused. The plant is only known from northernBahia,Brazil.[1]
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. Theareoles 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]
The genus was first described in 1968 byFranz Buxbaum.[5] The specific epithetdybowskii honors the botanist and agricultural scientistJean Dybowski. Its only species was first described in 1909 asCereus dybowskii by Robert Roland-Gosselin.[6] Furthernomenclature synonym areCephalocereus 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) andColeocephalocereus dybowskii (Rol.-Goss.) F.H.Brandt (1981).
The genus was formerly placed in subtribeTrichocereinae, but a 2023molecular phylogenetic study found that it belonged to subtribeCereinae.[7]
Espostoopsis dybowskii is found growing in granite and quartz outcrops in northernBahia, Brazil at altitudes of 300 to 750 meters.[8]
Media related toEspostoopsis at Wikimedia Commons
Data related toEspostoopsis at Wikispecies