Floral diagram
- Contents
- Floral formula (花式)
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A method of recording floral structure, in particular, configuration of floral organs, expressed by a series of symbols, letters, and numbers
Abbreviations
Ca (or K), calyx or whorl of sepals
Co (or C), corolla or whorl of petals
CaCo, perianth, if sepals and petals are alike
A, androecium, or whorl of stamens
G, gynoecium (pistil), or ovary bearing carpelsn
n, number of organs
Ca3, three sepals
Cam-n, sepals ranging from m to n
Ca∞, numerous sepalsKeys
fully distinct or fused 
fully fused or connate, especially for the carpels of the gynoecium 
basally fused or connate 
apically fused or connate ♂ male unisexual flower ♀ female unisexual flower 
hermaphrodite bisexual flowers * staminode; a sterile stamen 
ovary inferior to insertion point of the other whorls. The floral whorls are epigynous to the gynoecium 
ovary superior to insertion point of other floral whorls. The floral whorls are hypogenous to the gynoecium 
ovary inferior to superior, with variations - Floral diagram (花式図)
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A stylized representation of flower structure in which the whorls of floral parts are shown as a series of concentric circles. All floral segments arising at the same level are placed, in their correct relative positions, in the same circle. When appropriate, fusion of parts is also indicated. The ovary is represented in cross section in the center of the whorls.
Magnolia stellata (シデコブシ) [Magnoliaceae] 
Lamium album var. bartatum [Lamiaceae] 
Ornithogatum umbellata [Liliaceae] ●: floral axis or rachis
Poaceae c: calyx, a: androecium, p: petal, b: bract, l: lemma, s: stamen
Oxalis corniculata L. [Oxalidaceae]
Kerria japonica (L.) DC. [Rosaceae]
Robinia pseudoacacia L. [Fabaceae]
Leucanthemum vulgare [Asteraceae] - References
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- Engler's syllabus (エングラー体系)