Micrairoideae

Micrairoideae is a subfamily of the grass family Poaceae, distributed in tropical and subtropical regions.^[1] Within the PACMAD clade, it is sister to subfamily Arundinoideae.^[2]

Micrairoideae
Isachne globosa spikelets
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Poaceae
Clade:	PACMAD clade
Subfamily:	Micrairoideae Pilg. (1956)
Tribes
Eriachneae Isachneae Micraireae

It includes roughly 190 species in nine genera. A phylogenetic classification of the grasses recognises four main lineages, classified as tribes. Only species in tribe Eriachneae (genera Eriachne and Pheidochloa) have evolved the C₄ photosynthetic pathway.^[3]

Phylogeny

Relationships of tribes in the Micrairoideae according to a 2017 phylogenetic classification,^[4] also showing the Arundinoideae as sister group:

	Arundinoideae
Micrairoideae	Micraireae Eriachneae Isachneae