thumb|right|The [[inflorescence of a Phalaenopsis orchid is a typical raceme.]]
A raceme () or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the shoot grows in height, with no predetermined growth limit. Examples of racemes occur on mustard (genus Brassica), radish (genus Raphanus), and orchid (genus Phalaenopsis) plants.
Definition
A raceme or racemoid is an unbranched, indeterminate type of inflorescence bearing pedicellate flowers (flowers having short floral stalks called pedicels) along its axis. In botany, an axis means a shoot, in this case one bearing the flowers. In indeterminate inflorescence-like racemes, the oldest flowers grow close to the base and new flowers are produced as the shoot grows in height, with no predetermined growth limit. in which case the stalk supporting the cluster becomes the pedicel. A true spikelet comprises one or more florets enclosed by two glumes (sterile bracts), with flowers and glumes arranged in two opposite rows along the spikelet. Examples occur on rice (species Oryza sativa) and wheat (genus Triticum), both grasses.
Spadix
A spadix is a form of spike in which the florets are densely crowded along a fleshy axis and enclosed by one or more large, brightly colored bracts called spathes. Usually the female flowers grow at the base, and male flowers grow above. They are a characteristic of the family Araceae, for example jack-in-the-pulpit (species Arisaema triphyllum) and wild calla (genus Calla).
See also
- Inflorescence
- Glossary of botanical terms
References
sv:Blomställning#Typer av blomställningar