Portulacaria

Portulacaria
Portulacaria afra
Mature Portulacaria afra
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Didiereaceae
Subfamily: Portulacarioideae
Genus: Portulacaria
Jacq.

Portulacaria is a genus of succulent plant, classified in its own subfamily Portulacarioideae in the family Didiereaceae. It is indigenous to southern Africa.

Taxonomy

The genus was previously placed in the family Portulacaceae, but according to molecular studies is part of Didiereaceae.

It has further been revised when phylogenetic tests showed conclusively that genus Ceraria was located within Portulacaria, and all Ceraria species have consequently been renamed and moved into this genus.[1]

Species

Portulacaria pygmaea (formerly Ceraria pygmaea)

As of March 2024, Plants of the World Online accepted the following species:[2]

Uses

Portulacaria afra normally uses C3 (or Hatch-Slack) carbon fixation but is also able to switch to CAM carbon fixation when drought stressed.

It is a local delicacy and its leaves are eaten by the local peoples. It is also popular internationally as a garden plant.[3] Because of its superficial resemblance to some species in the family Crassulaceae, most of which are toxic,[4] the two are readily, and possibly dangerously, confused by people unaware of the differences.

References

Wikimedia Commons has media related to
Portulacaria.
  1. ^ P.Bruyns, M.Oliveira-Neto, G.F. Melo de Pinna, C.Klak: Phylogenetic relationships in the Didiereaceae with special reference to subfamily Portulacarioideae. Taxon 63 (5). October 2014. 1053-1064.
  2. ^ "Portulacaria Jacq." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2024-03-17.
  3. ^ Guralnick, L. J.; Ting, I. P. (1987). "Physiological Changes in Portulacaria afra (L.) Jacq. during a Summer Drought and Rewatering". Plant Physiology. 85 (2): 481–6. doi:10.1104/pp.85.2.481. PMC 1054282. PMID 16665724.
  4. ^ Watt, John Mitchell; Breyer-Brandwijk, Maria Gerdina: The Medicinal and Poisonous Plants of Southern and Eastern Africa 2nd ed Pub. E & S Livingstone 1962

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