Solanum nodiflorum
[Black Nightshade]

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Close-up views:

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Seedling:

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For quite a long time, I had thought that this herb was Solanum nigrum (another Black Nightshade). After I started to grow it and did more detailed search on information related to this herb, its actual identity should be the American Black Nightshade (Solanum americanum). However, I came across a genetic study by Manoko [1] that made me deduced that the species seen in Singapore is more likely to be Solanum nodiflorum although some botanists treat Solanum americanum and Solanum nodiflorum as the same species. According to the publication, besides the genetic evidence, the flower of Solanum americanum has an exserted style (pillar-like stalk that connect to the ovary) while this feature is not presence in Solanum nodiflorum. The plant that I saw did not had an exserted style.

According to a plant virus website, this plant may be infected by mottle virus transmitted by beetles. One of the beetles indicated is Epilachna vigintioctopunctata, a synonym of Henosepilachna vigintioctopunctata (Hadda Beetle).

Reference:

[1] Manoko MLK, van den Berg RG, Feron RMC, van der Weerden GM, Mariani C. AFLP markers support separation of Solanum nodiflorum from Solanum americanum sensu stricto (Solanaceae). Plant Systematics & Evolution 2007;267:1-11. | Read article |

Online Resources: | Electronic Flora of South Australia | Alien Plants of Belgium | New Zealand Plant Conservation Network |

In 2012, I managed to collect some matured fruits from the wild and grew the plant in a pot. | Read more |

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