Danthonioideae

Danthonioideae
Pampas grass (Cortaderia selloana)
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
(unranked):	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Danthonioideae Barker & H.P.Linder
Tribe:	Danthonieae Zotov

Danthonioideae is a mainly southern hemisphere subfamily of grasses, containing the single tribe Danthonieae and three unplaced genera, with altogether roughly 300 species.^[1] It includes herbaceous to partially woody perennial or annual (less common) grasses that grow in open grasslands, shrublands, and woodlands.^[2] It belongs to the PACMAD clade of grasses, but unlike some other lineages in that clade, grasses in the Danthonioideae exclusively use the C₃ photosynthetic pathway.^[3] Its sister group is the subfamily Chloridoideae.^[3]

There are 20 genera, 17 of which are placed in tribe Danthonieae, while three are as yet unplaced (incertae sedis).^[1] The relationships within the group are complicated; conflicting phylogenetic evidence from nuclear and chloroplast DNA suggests that hybridisation events played an important role in the Danthonioideae.^[4]

• incertae sedis:

  Alloeochaete, Danthonidium, Phaenanthoecium

• tribe Danthonieae:

  Austroderia, Capeochloa, Chaetobromus, Chimaerochloa, Chionochloa, Cortaderia (syn. Lamprothyrsus), Danthonia, Geochloa, Merxmuellera, Notochloe, Pentameris (syn. Pentaschistis, Poagrostis, Prionanthium), Plinthanthesis, Pseudopentameris, Rytidosperma (syn. Monostachya, Notodanthonia, Pyrrhantherea), Schismus (syn. Karroochloa), Tenaxia, Tribolium

References

1. 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. ISSN 1674-4918.
2. Grass Phylogeny Working Group; Nigel P. Barker; Lynn G. Clark; Jerrold I. Davis; Melvin R. Duvall; Gerald F. Guala; Catherine Hsiao; Elizabeth A. Kellogg; H. Peter Linder (2001). "Phylogeny and Subfamilial Classification of the Grasses (Poaceae)". Annals of the Missouri Botanical Garden (Missouri Botanical Garden Press) 88 (3): 373–457. doi:10.2307/3298585.
3. 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. ISSN 0028-646X. PMID 22115274.
4. Pirie, M. D.; Humphreys, A. M.; Barker, N. P.; Linder, H. P. (2009). "Reticulation, Data Combination, and Inferring Evolutionary History: An Example from Danthonioideae (Poaceae)". Systematic Biology 58 (6): 612–628. doi:10.1093/sysbio/syp068. ISSN 1063-5157.