Anomochlooideae

Anomochlooideae
Drawing of Anomochloa
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Anomochlooideae Pilg. ex Potztal
Type genus
Anomochloa Brongn.[1]
Tribes
Anomochloeae C.E.Hubb Streptochaeteae C.E.Hubb
Synonyms[2]
Streptochaetoideae Butzin (1965)

Anomochlooideae is a subfamily of the true grass family Poaceae. It is sister to all the other grasses. It includes perennial herbs that grow on the shaded floor of forests in the Neotropics. There are two genera, Anomochloa and Streptochaeta, each in its own tribe.

Description

Anomochlooideae are terrestrial,[3] rhizomatous, perennial herbs with pseudopetiolate, broad leaves.[4]

Cytology

The diploid chromosome count of Anomochloa is 2n = 36, and the chromosome count of Streptochaeta is 2n = 22.[4]

Taxonomy

It was validly published in 1957 by Eva Hedwig Ingeborg Potztal based on previous work from Robert Knud Friedrich Pilger.[5] The type genus is Anomochloa Brongn.[1][5]

Evolutionary relationships

This subfamily is the most early-diverging lineage of the grasses:[6]

Poaceae	Anomochlooideae Pharoideae Puelioideae BOP clade PACMAD clade

Conservation

Anomochloa marantoidea is almost extinct in the wild.[4]

References

1. Missouri Botanical Garden. (n.d.-d). Anomochlooideae Pilg. ex Potztal. Tropicos. Retrieved January 3, 2025, from https://www.tropicos.org/name/50063069
2. Soreng, Robert J.; Peterson, Paul M.; Romaschenko, Konstantin; Davidse, Gerrit; Zuloaga, Fernando O.; Judziewicz, Emmet J.; Filgueiras, Tarciso S.; Davis, Jerrold I.; Morrone, Osvaldo (2015). "A worldwide phylogenetic classification of the Poaceae (Gramineae)". Journal of Systematics and Evolution. 53 (2): 117–137. doi:10.1111/jse.12150. hdl:11336/25248. ISSN 1674-4918. S2CID 84052108.
3. Anomochlooideae in Flora e Funga do Brasil. Jardim Botânico do Rio de Janeiro. Available at: https://floradobrasil.jbrj.gov.br/FB102235 Accessed on: 04 Jan. 2025
4. Kellogg, E.A. (2015). I. Subfamily Anomochlooideae Pilg. ex Potztal (1957). In: Flowering Plants. Monocots. The Families and Genera of Vascular Plants, vol 13. Springer, Cham.
5. subfam. Anomochlooideae Pilg. ex Potztal. (n.d.). International Plant Names Index. Retrieved January 4, 2025, from https://www.ipni.org/n/321655-2
6. Grass Phylogeny Working Group II (2012). "New grass phylogeny resolves deep evolutionary relationships and discovers C₄ origins". New Phytologist. 193 (2): 304–312. doi:10.1111/j.1469-8137.2011.03972.x. hdl:2262/73271. PMID 22115274.