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Neolitsea cassia and Cinnamomum cassia

Delhi, India

Sorry this is not a general gardening question, but rather on identity of two distinct taxa. Perhaps taxonomists on this forum can help.

Cinnamomum cassia (L.) J. Presl (Chinese cinnamom, Chinese cassia) and Neolitsea cassia (L.) Kosterm (Grey bollywood, smooth-barb bollygum) are supposed to be two distinct plants, but both supposed to be based on same basionym Laurus cassia L.

http://www.tropicos.org/Name/50148283

GRIN cites Laurus cassia L. (basionym); Litsea zeylanica Nees & T. Nees and Neolitsea zeylanica (Nees & T. Nees) Merr. as synonyms of Neotitsea cassia (L.) Kosterm, but is silent on Cinnamomum cassia, except that it cites Cinnamomum cassia auct. as synonym of C. aromaticum Nees

The Plant list cites Laurus cassia L. as well as Cinnamomum aromaticum Nees as synonyms of Cinnamomum cassia (Nees & T. Nees) J. Presl, silent on combination C. cassia (L.) C. Presl but does not cite any synonym for Neolitsea cassia (L.) Kosterm (not even the basionym for combination is mentioned).

According to Flora of China Cinnamomum cassia (L.) D. Don is the accepted name with Laurus cassia L. Cinnamomum aromaticum Nees and Persea cassia (L.) Sprengel. as synonyms

I am at loss to comprehend how single binomial can be basionym for more than one distinct, accepted names. Any help in better understanding of situation?



Seattle, WA

I have a similar situation here regarding different genera. I photographed Hymenanthera crassifolia at the Botanical Gardens in Shoreline,WA around 3 weeks ago. When I came home and googled around some authorities listed it as an accepted genus Hymenanthera crassifolia while some other authorities treated it as a synonym of Melicytus crassifolius.

I still unable to determine which is the currently accepted one and which is the synonym.

Anyone here helps clarify would be greatly appreciated.

Thanks

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