| The proximal aulacophore is polymerous, rather than tetramerous and superficially similar to that of the earliest stylophoran, Ceratocystis. |
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| The perianth of Calceolariaceae is shown to be derived from a tetramerous condition, not from pentamery as traditionally believed. |
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| Next to the typical pentamerous flowers, some groups exhibit tetramerous morphology. |
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| However, there are details in floral development that differ among the tetramerous families. |
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| They usually have umbrella-shaped bodies and tetramerous symmetry. |
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| The stele is divided into three parts, the tetramerous proxistele closest to the theca tapering through the mesistele to the dimerous dististele furtherest from the theca. |
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| The stele is divided into three parts, the tetramerous proxistele closest to the theca tapering through the mesistele to the dimerous dististele furthest from the theca. |
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| The sections used for immunochemical staining were tissue microarrays with tetramerous for each case. |
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| The genus is characterized by tetramerous flowers with bithecal anthers, lack of pseudostaminodia, a capitate or poorly defined stigma, and pollen of the Amaranthus type. |
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| The species are distinguished from most other tetramerous beetles, by the thickened hinder thighs, by which they are enabled to leap to a considerable height into the air. |
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| Halenia is a herbaceous genus with tetramerous, mostly spurred flowers distributed in high-altitude areas of Asia and the Americas. |
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| As their name suggests, the crucifers have tetramerous flowers. |
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