Subfamilies
Pooideae
- 1 or more florets per spikelet
- panicle infloresences (except Lolium and Triticeae)
- reduced floret above the perfect floret when present
- base chromosome number x = 7 (exceptions 8,9,10)
- embryo formula F + FF
- C3 photosynthetic pathway
Bambusoideae
- 1 or more florets per spikelet
- panicle or raceme inflorescences
- reduced floret above perfect floret when present
- base chromosome number x = 6, 12 (10, 11)
- embryo formula F + PP
- C3 photosynthetic pathway
Oryzoideae
- 1 floret per spikelet
- glumes absent
- chromosome number x = 6
- embryo formula F + FP, F + PP
- C3 photosynthetic pathway
Arundinoideae
- 1 or more florets per spikelet
- panicle inflorescences
- chromosome number x = 6 (exceptions 11)
- embryo formula P - PF, P + PP
- C3 (C4) photosynthetic pathway
Chloridoideae
- 1 - several florets per spikelet
- panicle inflorescence
- reduced floret above the perfect floret when present
- base chromosome number x = 9, 10 (exceptions 8)
- embryo formula P +PF
- C4 (C3) photosynthetic pathway
Panicoideae
- 2 florets per spikelet
- panicle inflorescence
- reduced flroet below the perfect flroet
- base chromosome number x = 9, 10
- embryo formula P - PP
- C4, (C3) photosynthetic pathway
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