Calyx and corolla. Term used especially when petals and sepals are not easily distinguished from each other.
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Article from Bean's Trees and Shrubs Hardy in the British Isles
Recommended citation 'Dirca' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/dirca/). Accessed 2023-12-10.
A genus of two species, both natives of N. America. Dirca is closely allied to the daphnes, from which it differs in the indistinctly lobed perianth-tube and the exserted stamens.