keel [
PO:0025327; plant anatomy term ]
A boat-shaped collective phyllome structure (PO:0025023) that consists of the two lowest petals (PO:0009032) of a papilionaceous corolla (PO:0009059).
More Synonyms: 竜骨(イネ科)、舟弁(マメ科) (Japanese), quilla (Spanish)
Comments: The two petals of the keel are often fused at the apex and free at the base. The keel projects toward the front of the flower. Found in the flowers of some Fabaceae.
keel petal [
PO:0025326; plant anatomy term ]
A petal (PO:0009032) that is one of the two lowest petals of a papilionaceous corolla (PO:0025324).
More Synonyms: carina, carinae, pétalo quilla (Spanish), 杯状花弁、竜骨弁 (Japanese)
Comments: The keel petals are usually larger than the adjacent wing petals. They are often partially fused to each other. Each petal is shaped like half a boat and projects toward the front of the flower.