CYTOGENETICS AND EVOLUTION OF THE GRASS FAMILY 



177 



PANICOID CHLORIDOID FESTUCOID BAMBUSOID 



Spikelet 

 structure 



Lodicules 



^i ^^ 



Caryopses 



Embryos 



Fig. 4. Chart showing the differences between the four largest subdivisions of 

 the grass family with respect to four reproductive characteristics. Diagrams show- 

 ing mode of reduction and abortion of florets of the spikelets (all from Prat, 1936). 

 Lodicules and caryopses: Sorghum halepense {original, from University of Calif or- 

 7ua campus, Davis) ; Eleusine indica (origimil, from Story County, Iowa, Caldwell 

 no. 60, University of California Agronomy Herb.) ; Agropyron junceum {from Hub- 

 bard, 1948); Arundinaria japonica {from Hubbard, 1948). Embryos: Sorghum 

 vulgare, Chloris verticillata, Fesfuca elatior {all from Reeder, 1953); Arundinaria 

 tecta {original drawing of J. R. Reeder). Magnifications various. 



