I want to know too! Fwiw, before Google, a botanist at Pearl City at extension service told me it was gumi or goumi, a Japanese ornamental. Now that I search on that name, gumi looks nothing like this plant. Good thing I cut it down and yanked the root from my garden back then!

Cosmos is an annual and will selfseed here in my garden if allowed to go to seed. Different cultivars have differing heights and may vary some in the red, pink white spectrum, including bicolors. Started indoors a few weeks before last frost and it will bloom earlier than selfseeded plants.

That name is always causing confusion. It's Beauty BERRY, Callicarpa.

I’m no Colocasia expert, but there is a variety named “Violet Stem” that looks similar. There’s also “Red Stem” and “Rhubarb”...