Spikelets (kinds of cluster)

                   

solitary                                                           in pairs, 1 sessile and fertile, the other pedicelled        in 3's

      

clustered at each node                                    in a cluter of closely packed nodes                  subtended by an involucre

in pairs

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith