A raceme is a type of flower arrangement where flowers are attached by short equal stalks at equal distances along a central stem, while a panicle features a branched cluster of flowers with flowers on branches of different lengths.

When the spikelets are attached to the rachis with short pedicels, the inflorescence is termed as raceme. When the spikelets are attached by means of a branch the inflorescence is said to be a panicle. pedicel: in grasses, a short stem segment supporting a spikelet.

In summary, the main difference between a raceme and a panicle is the branching pattern of the inflorescence. A raceme has a single central stem with flowers attached by individual stalks, while a panicle has a more complex, branched structure with multiple smaller stems and racemes.

A panicle features a branching structure where smaller branches stem off from a main axis. A raceme is a simpler structure, with flowers attached by short stalks along a central stem. Panicles often appear more complex and diffuse due to their branching pattern.

A Raceme is a flower spike where the flowers have stalks of equal length, and the tip of the stem continues to grow and produce more flowers. Flowers open from the bottom up. The example is Linaria vulgaris. A Panicle is a branched raceme, each branch having a smaller raceme of flowers.