Spike
/spaɪk/
Definition
Spike refers to a type of inflorescence, or flower cluster, in which individual flowers are attached directly to the main stem without stalks. This stalkless arrangement distinguishes it from a raceme, where each flower has its own short stem. spikes may be dense or elongated and are common in many grasses and in plants such as plantain (Plantago), where they hold numerous small flowers along a central axis.
Botanical Significance
- Identification value: In plant identification, spike helps separate similar flowering forms because the flowers attach directly without individual stalks. This detail is commonly used in field guides and botanical keys.
- Pollination pattern: The arrangement can support efficient pollen transfer by presenting many flowers along one axis, especially in grasses and other wind-pollinated plants where exposure matters.
- Common in major plant groups: Spike appears in several important families, including grasses, where it may occur as a whole inflorescence or as part of a larger flowering structure. Its form can vary in density and length.
- Garden observation: Watching how flowers open along a spike can help with timing for pruning, seed collection, or display. In many species, blooming progresses from the base upward or from the outside inward.
Related Terms
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…
Head
In botany and gardening, a head is a compact, rounded cluster of plant parts, most often flowers or leaves, grouped…
Spathe
Spathe refers to a specialized bract, or modified leaf, that encloses or subtends a flower cluster. It is common in…