Biology:Euphorbia regis-jubae

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Short description: Species of flowering plant

Euphorbia regis-jubae
Teguise - Camino de Teguise al las Nieves - Euphorbia regis-jubae 08 ies.jpg
In habitat, Teguise, Lanzarote
CITES Appendix II (CITES)[1]
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Euphorbiaceae
Genus: Euphorbia
Species:
E. regis-jubae
Binomial name
Euphorbia regis-jubae
J.Gay[2]
Synonyms[2]
  • Euphorbia capazii Euphorbia lamarckii subsp. regis-jubae
  • Tithymalus regis-jubae (J.Gay) Klotzsch & Garcke
  • (J.Gay) Maire J.Gay) Oudejans
  • Euphorbia mauritanica Euphorbia virgata subsp. regis-jubae
  • Webb ex J.Gay Caball.
  • Euphorbia obtusifolia subsp. regis-jubae (J.Gay) Soldano
  • H.Lindb. Euphorbia pseudodendroides

Euphorbia regis-jubae is a species of flowering plant in the family Euphorbiaceae, native to the eastern Canary Islands, western Morocco, north-western Western Sahara.[2] In Spanish, it is known as tabaiba morisca.[3] It has often been confused with Euphorbia lamarckii.

Description

Euphorbia regis-jubae is a shrub, up to 2 m (7 ft) tall. It has light brown stems and terminal rosettes of leaves that are narrow and oblong, with a pointed or somewhat blunt apex. The inflorescences are pedunculate, umbel-like, usually simple with five to eight rays, more rarely compound. The greenish-yellow floral bracts are large, not joined at the base, and persist when the fruit has formed. The fruit capsules are light brown or red. The seeds have a stalked elaiosome (caruncle).[4][3]

Taxonomy

Euphorbia regis-jubae was first described by Jaques Étienne Gay in 1847.[2] It has been treated as a subspecies of other Canary Island euphorbias under the names E. obtusifolia subsp. regis-jubae and E. lamarckii subsp. regis-jubae.[2]

E. regis-jubae has regularly been misidentified. The illegitimate name Euphorbia obtusifolia Poir. has been used "indiscriminately" for two species found in the Canary Islands: the eastern E. regis-jubae, and the western E. lamarckii. In 2003, David Bramwell listed seven publications from 1847 to 1993 that gave the wrong names or the wrong distributions for these two species.[5]

Distribution

Euphorbia regis-jubae is native to the eastern Canary Islands – Gran Canaria, Lanzarote and Fuerteventura, western Morocco and north-western Western Sahara.[2] Its distribution differs from that of E. lamarckii, with which it has often been confused; E. lamarckii is found in the western Canary Islands – Tenerife, north-western La Gomera, La Palma and El Hierro.[6]

References

Wikidata ☰ Q5851909 entry