Comparison of Grass Subfamilies

8/6/09 Pooideae Chloridoideae Panicoideae Arundinoideae Bambusoideae Centothecoideae Danthonioideae Aristidoideae Enrhartoideae
base chromosome number x=7 [exception Meliceae (x= 8, 9, or 10) and Stipeae (x=11)] x=9 or x= 10 [exception Erioneuron (x=8)] x= 9 or x= 10 x = 6 x=6 [exception Bambuseae (x= 10 and 11)] x= 6, 12 x= 6, 7, 9 x= 11, 12 x = 12
photosynthetic pathways C3 C4(C3) C4(C3) C3(C4) C3 C3 C3 C4 C3
embryo formula F + FF P+ PF P-PP P-PF F+ PP, F + FP P+PP P-PF, P-PP P-PF, P-FF F-PP, F+FP
bicellular microhairs absent present present present or absent present present present (rarely absent) present present or absent
spk dissarticulation/ glumes above above (below Unioleae) below above above above above above above
position red. Flt. (when present)/ glumes above (Phalaris ex.) above [below and above Unioleae] below below above above/below above absent below
tribes Aveneae, Brachyelytreae, Brachypodieae, Bromeae, Hainardieae, Meliceae, Poeae, Stipeae, Triticeae Cynodonteae, Eragrosteae, Pappophoreae, Unioleae Andropogoneae, Paniceae Arundineae Bambuseae, Diarrheneae Centotheceae Danthonieae Aristideae Ehrharteae, Oryzeae