Seeds black, maybe 2 mm long Whole plant (as I saw it) maybe 16" tall, none of the individuals I saw had branching stems. Any ideas ? Thanks, Matt
That's what I'd say, too. They're a nuisance weed for me, and I have both the white and pink flowered varieties.
http://thisonething.typepad.com/pho.../08/29/lwg_annuals_madagascar_periwinkle1.jpg Spot on guys ! In France we have Vinca "Periwinkle" as an invasive herb - growing in carpets in a similar fashion to Catharanthus. I think this is the first real Catharanthus I have seen, funny to see solitary plants. Thank you both, Matt