Deamia

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Deamia
Strophocactus testudo13UE.jpg
Deamia testudo
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Echinocereeae
Genus: Deamia
Britton & Rose [1]
Species

See text.

Deamia is a genus of cacti. Its species are native from south Mexico through Central America to Nicaragua. Its species have been placed in Selenicereus and Strophocactus .

Contents

Description

Species of Deamia are climbing or pendent shrubs. Their flowers have hairs and spines and are followed by red fruit with clear pulp. [2]

Taxonomy

The genus was erected by Nathaniel Lord Britton and Joseph Nelson Rose in 1920, [3] with the single species Deamia testudo . The name honours Charles C. Deam, a plant collector who sent the plant to Britton and Rose. [4] It was treated as a distinct monotypic genus until 1965, when Franz Buxbaum merged it into Selenicereus. Alexander Doweld revived the genus in 2002, adding the species then treated as Selenicereus chontalensis. [2] Molecular phylogenetic studies in 2017 (based on the two species then known) and in 2018 (three species) confirmed the monophyly of the genus. [2] [5] It was placed in the tribe Echinocereeae, subtribe Pachycereinae. [5] It was one of the early diverging members of the tribe in the cladograms obtained in the 2018 study, with the species related as follows: [5]

Deamia

Deamia testudo

Deamia montalvoae

Deamia chontalensis

Deamia funis

Species

Two species were accepted in a 2017 study of the tribe Hylocereeae which revived the genus Deamia. [2] A third species was described in 2018. [5] A new species Deamia funis was discovered in 2022

ImageScientific nameDistribution
Deamia chontalensis (Alexander) Doweldsouthwestern Mexico and Guatemala
Deamia funis Hammel & S.AriasNicaragua
Deamia montalvoae Cerén, J.Menjívar & S.Ariassoutheastern Mexico, Guatemala and El Salvador.
Strophocactus testudo13UE adj.jpg Deamia testudo (Karwinsky ex Zuccarini) Britton & Rosesouthern Mexico through Central America to Nicaragua.

As of March 2021, Plants of the World Online still placed D. chontalensis in the genus Selenicereus. [1]

References

  1. 1 2 "Deamia Britton & Rose", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2021-03-09
  2. 1 2 3 4 Korotkova, Nadja; Borsch, Thomas & Arias, Salvador (2017), "A phylogenetic framework for the Hylocereeae (Cactaceae) and implications for the circumscription of the genera", Phytotaxa, 327 (1): 1–46, doi:10.11646/phytotaxa.327.1.1
  3. ↑ "Deamia Britton & Rose", The International Plant Names Index , retrieved 2021-03-12
  4. ↑ Britton, N.L. & Rose, J.N. (1920), "5. Deamia gen. nov.", The Cactaceae Vol. 2, Washington, D.C.: The Carnegie Institution, pp. 212–214, retrieved 2021-03-09
  5. 1 2 3 4 Cerén, G.; Cruz, M.S.; Menjívar, J. & Arias, S. (2018), "A new species of Deamia (Cactaceae) from the Mesoamerican region", Phytotaxa, 369 (4): 251–259, doi:10.11646/phytotaxa.369.4.2
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