Do both Bidens and Pimelea have poisonous species in them?
Bidens:  The common names beggarticks, black jack, burr marigolds, cobbler's pegs, Spanish needles, stickseeds, tickseeds and tickseed sunflowers refer to the fruits of the plants, most of which are bristly and barbed, with two sharp pappi at the end. Bidens:  The generic name refers to the same character; "Bidens" comes from the Latin "bis" ("two") and "dens" ("tooth"). Pimelea:  Many of the species are poisonous to cattle and horses.
i don't know