Peltandreae is a

tribe The term tribe is used in many different contexts to refer to a category of human social group. The predominant worldwide use of the term in English is in the discipline of anthropology. The definition is contested, in part due to conflict ...

of plants in the

arum ''Arum'' is a genus of plants in the Araceae family; they are native to Europe, northern Africa, and western and central Asia, with the highest species diversity in the Mediterranean region. Frequently called arum lilies, they are not closely ...

family.

Distribution

The distribution is disjunct. ''Peltandra'' is native to Eastern North America and the Caribbean (Canada, USA, Cuba) and ''Typhonodorum'' is native to Africa (the Comoros, Madagascar, Mauritius, Tanzania).

Taxonomy

Taxonomic history

The tribe was first described in 1876 by the German botanist

Heinrich Gustav Adolf Engler Heinrich Gustav Adolf Engler (25 March 1844 – 10 October 1930) was a German botanist. He is notable for his work on plant taxonomy and phytogeography, such as ''Die natürlichen Pflanzenfamilien'' (''The Natural Plant Families''), edited with ...

(Engl.). Engler placed ''Typhonodorum'' in a separate tribe Typhonodoreae.Engler, A. (1876)
"Vergleichende Untersuchungen über die morphologischen Verhältnisse der Araceae (Vol. 3)."
Druck von E. Blochmann & Sohn für die Akademie in Commission bei Wilh. Engelmann in Leipzig.Boodle, L. A., & HILL, A. W. (1929)
"''Typhonodorum lindleyanum'': The development of the embryo and germination of the seed."
Annals of Botany, 43(171), 437-450.Engler, A. (1915)
"Araceae-Philodendroideae-Anubiadeae, Aglaonemateae, Dieffenbachieae, Zantedeschieae, Typhonodoreae, Peltandreae."
/ref> However, it is now included in Peltandreae.''Typhonodorum''. (n.d.). GBIF , Global Biodiversity Information Facility. Retrieved February 18, 2023, from https://www.gbif.org/species/103021699

Genera

Peltandreae consists of the following two genera:Renner, S. S., & Zhang, L. B. (2004). Biogeography of the ''Pistia'' clade (Araceae): based on chloroplast and mitochondrial DNA sequences and Bayesian divergence time inference. Systematic Biology, 53(3), 422-432. *''

Peltandra ''Peltandra'', the arrow arums, is a genus of plants in the family Araceae. It is native to the eastern United States, eastern Canada, and Cuba. ;Species # '' Peltandra sagittifolia'' - (Michx.) Morong - Spoon flower or the white arrow arum - s ...

'' Raf. *'' Typhonodorum'' Schott

Phylogeny

It is closely related to the European tribes Ambrosineae and Arisareae. These three tribes shared a common ancestor about 82.7 million years ago.Mansion, G., Rosenbaum, G., Schoenenberger, N., Bacchetta, G., Rosselló, J. A., & Conti, E. (2008)
"Phylogenetic analysis informed by geological history supports multiple, sequential invasions of the Mediterranean Basin by the angiosperm family Araceae."
Systematic Biology, 57(2), 269-285. 60 Million years old Peltandreae fossils have been found in Europe, North America, and Central Asia. Therefore, the group has existed for at least 60 Million years, as the evidence of the fossil record suggests, but the analysis of the

molecular clock The molecular clock is a figurative term for a technique that uses the mutation rate of biomolecules to deduce the time in prehistory when two or more life forms diverged. The biomolecular data used for such calculations are usually nucleot ...

suggests this group is about 82.7 million years old. The precise relationships are displayed in the following cladogram:

References

Aroideae Monocot tribes {{Araceae-stub