Some manifestations of toxicity are subtle. Some examples of species with narrow leaves would include the Asclepias verticillata, or whorled milkweed and the Asclepias linaria, or pine needle milkweed. Asclepias incarnata (Swamp weed); Asclepias (Milkweed); Asclepias syriaca (Common milkweed); Asclepias tuberosa L. (Butterfly weed). When the plants are pollinated, they produce pods filled with flat brown seeds. But butterfly weed (Asclepias spp.) LockA locked padlock | The information contained herein is provided as a public service with the understanding that Colorado State University makes no warranties, either expressed or implied, concerning the accuracy, completeness, reliability, or suitability of the information. Poisoning also may occur if animals are fed hay containing large amounts of milkweed. Hay contaminated with milkweed should not be fed to sheep or cattle. This transfers the toxin to their bodies and, in turn, makes them poisonous to most, but not all, predators. If so,, are there any milkweeds that we could include? Causes of Milkweed Poisoning in Dogs If you decide to keep a plant in the house thats poisonous to pets, there are steps you can take to keep it out of reach. Difficulty in breathing with expiratory grunting sounds, Rapid, weak pulse or other cardiac arrhythmias. Follow all precautions for handling herbicides. The Milkweed Plant and Its Relation to the Monarch Butterfly The milkweed is a hardy, perennial plant that is found all over the USA. Milkweed is a popular plant among gardeners as it attracts butterflies. When an animal goes off feed, loses weight or appears unhealthy, poisonous plants may be the cause. Common milkweed (Asclepias syriaca ) is an erect-stemmed, herbaceous perennial plant from the Apocynaceae family.It is often thought of as a weed, due to its ability to spread rapidly through underground rhizomes. Several species of milkweed are poisonous to range animals. PLEASE NOTE: "Poisonous" does not mean deadly. Milkweed produces a milky white sap that contains a mild poison; its bitter taste warns away many of the animals and insects that try to eat its tender leaves. Just make sure its far from bookcases and other areas easily accessible to cats. Here are some or all of the milkweeds that I would like to include (or others if you recommend them). Milkweed poisoning is a well-known problem with grazing livestock, and it can kill if eaten in bulk. As is the case with many plant poisonings, preventing consumption of the plant is the only guaranteed means of avoiding toxicity and potential death. Milkweed gets its name from the milky sap contained in its leaves and stems. Common milkweed produces cardiac-glycosides that are toxic to horses and might cause depression, irregular heartbeat, diarrhea, overall weakness, and … Colorado State University web pages do not endorse any commercial providers or their products. Although many milkweeds contain resinoids, most of th… Greenish-white flowers are borne in umbrella-like clusters. Common milkweed is a perennial, herbaceous plant that grows to heights of 2 to 6 feet on solitary stalks. Recognizing poisonous plants and properly managing animals and pastures will help minimize the potential of poisoning animals. Other species in order of toxicity include western whorled milkweed (A.subverticillata), woollypod milkweed (A. eriocarpa), and Mexican whorled milkweed (A. fascicularis).