Its sister group is the subfamily Chloridoideae .
It belongs to the PACMAD clade of grasses , but unlike some other lineages in that clade , grasses in the Danthonioideae exclusively use the C photosynthetic pathway .
Danthonioideae 's sister group is the subfamily Chloridoideae .
It belongs to the PACMAD clade of grasses , but unlike some other lineages in that clade , grasses in the Danthonioideae exclusively use the C photosynthetic pathway .