Monarch butterfly caterpillars are commonly found on all the milkweeds, including the heart-leaf milkweed. Adult viceroys nectar on milkweeds, thistles and other common flowers. Popular sources of nectar include milkweeds ("Asclepias") and western soapberry trees ("Sapindus saponaria"). They would boil down and eat wild onions, leeks, milkweeds, and dandelions. This plant contains ouabain, which is a cardiac glycoside, oleander, and milkweeds. It is in the genus "Asclepias", the milkweeds. The name comes from the type genus "Asclepias" (milkweeds). Flowers are actively visited and fed on by butterflies, similar to other milkweeds. The queen larvae feed on Apocynaceae (milkweeds and dogbanes). The orange-belted bumblebee forages on "Rubus", goldenrods, "Vaccinium", and milkweeds found throughout the colony's range. This is regularly seen in plants such as orchids and many species of milkweeds (Asclepiadoideae). Members of the genus are known generally as climbing milkweeds or caustic bushes. Toxic compounds in milkweeds are also sequestered, giving this insect its toxicity. Some, but not all, milkweeds also reproduced by clonal (or vegetative) reproduction. Translations of the name include both "among the milkweeds" and "slippery elms".