Peduncle
/pɪˈdʌŋkəl/
Definition
Peduncle refers to the main stalk that supports a flower, a cluster of flowers, or a fruiting structure. It arises from the stem and holds the reproductive structure above the rest of the plant. In an inflorescence, meaning a flower cluster, the peduncle is the primary stalk below the branches or individual flower stalks. This distinguishes it from a pedicel, which supports a single flower within the cluster.
Function in Plants
- Support for flowering and fruiting: The peduncle positions flowers or flower clusters where pollinators and wind can reach them more easily. After pollination, it also supports the developing fruit or seed-bearing structure.
- Pathway for transport: Inside the peduncle, vascular tissue carries water, minerals, and sugars between the main stem and the reproductive parts. This supply helps flowering, fruit set, and seed development proceed normally.
- Useful identification feature: Botanists often compare its length, branching, surface texture, and whether it is upright or drooping. Those traits can help distinguish species or describe inflorescence form, meaning the arrangement of flowers.
- Clue to plant condition: A weak, bent, or damaged peduncle can reduce flower display and may limit how well fruit is held. In gardening, this part is often checked for breakage, rot, or pest injury on flowering and fruiting plants.
Related Terms
Pedicel
Pedicel refers to the small stalk that supports a single flower, fruit, or seed-bearing structure within an…
Inflorescence
Inflorescence refers to the arrangement of flowers on a plant, or the complete flowering structure that bears a cluster…
Raceme
Raceme refers to a type of flower cluster, or inflorescence, with multiple stalked flowers attached along an elongated…
Panicle
Panicle refers to a branched flower cluster, or inflorescence, with a main stem and side branches that bear smaller…
Umbel
Umbel refers to a flower-cluster type, or inflorescence, in which several flower stalks arise from a single point at…
Spike
Spike refers to a type of inflorescence, or flower cluster, in which individual flowers are attached directly to the…
Head
In botany and gardening, a head is a compact, rounded cluster of plant parts, most often flowers or leaves, grouped…