types of inflorescences
Inflorescence: the arrangement of flowers on the stem or twig of a plant.
corymb 
Inflorescence composed of a main axis and laterally borne flowers with pedicels of unequal length, all ending at the same height.
umbel 
Inflorescence composed of a main axis and laterally borne flowers with pedicels of equal length, all originating from the same point.
biparous cyme 
Inflorescence whose main axis ends in a flower under which two lateral twigs develop; the process is repeated under each terminal flower.
uniparous cyme 
Inflorescence whose main axis ends in a flower under which a single lateral twig develops; the process is repeated under each terminal flower.
spike 
Inflorescence composed of a main axis and laterally borne flowers with no pedicel.
raceme 
Inflorescence composed of a main axis and laterally borne flowers with pedicels of equal length.
spadix 
Inflorescence composed of flowers with no pedicel, all embedded in an elongated ovoid receptacle.
capitulum 
Inflorescence composed of flowers with no pedicel, all embedded in a flat receptacle.