This inflorescence of the terrestrialorchidSpathoglottis plicata is a typical raceme.
A raceme is a type of inflorescence that is unbranched and indeterminate and bears pedicellateflowers (having short floral stalks called pedicels) along the axis. In botany, axis means a shoot, in this case one bearing the flowers. In a raceme, the oldest flowers are borne near the base.
A spike is a type of raceme in which the individual flowers are sessile (that is, lack pedicels). The term spikelet can refer to a small spike, although is also used to refer to the ultimate flower cluster unit in the grasses (Family Poaceae) and sedges (Family Cyperaceae), in which cases the stalk supporting the cluster becomes the pedicel.
Each of the units radiating outward in this inflorescence of a Cyperus (sedge) is a spikelet composed of small flowers arranged in two ranks
A spadix is a form of spike in which the florets are densely crowded along the axis.
Raceme (spray) yield was recorded weekly for K706-18 progenies from July 1990 until December 1993, while progenies of the other three amphidiploids were observed from June 1993 to June 1996.
Scape length was measured from the point of attachment to the pseudobulbs to the lowest flower, while raceme length was measured from the point of attachment to the pseudobulbs to the tip of the raceme.
Mean raceme yield per plant from July 1990 to December 1993, scape length, raceme length, and number of flowers per raceme of K706-18 progenies.
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