sentence: Some species are toxic.
sentences_before: Milkweeds are an important nectar source for bees and other nectar eaters, and a food source for caterpillars. These insects are able to feed on the plants despite their chemical defences. Milkweed is named after its milky sap, which contains alkaloids, latex, and several other complex compounds.
concept_name: specie
headings: Milkweed
categories: Flowering plants