Common Honeysuckle [image credit: iStock] 3. The name says it all — both the foliage and the berries of this plant are extremely toxic. Common Honeysuckle (Lonicera poericlymenum) Berries are poisonous if ingested. The wild birds eat the berries and distribute the seeds around in their poop. Ingestion of the berries can lead to cardiac arrest (heart attack) and death. Here are 10 tasty wild berries to try — and 8 poisonous ones to avoid. These fruits are poisonous to humans when ingested, but are favorites of birds. Many berries are commonly available in grocery stores, but other, equally delicious ones are abundant in the wild. The scientific name for this plant is Celastrus scandens. Similarly, is Bittersweet poisonous to humans? According to the US Department of Agriculture the American Bittersweet (Celastrus scandens) plant has a toxicity level of “None”. American bittersweet is the only species of Celastrus native to North America. Poisonous to Humans Problem for Cats Problem for Dogs Problem for Horses; Poisonous to Humans: Poison Severity: Low Poison Symptoms: vomiting, diarrhea, loss of consciousness, seizures Poison Toxic Principle: Cardenolides, alkaloids Causes Contact Dermatitis: No Poison Part: Bark Flowers Fruits Leaves Roots Sap/Juice Seeds Stems Pokeweed (Phytolacca Americana) Berries, seeds, and root are poisonous if ingested raw. Additional names for this plant include Bittersweet, Climbing Bittersweet, False Bittersweet, Oriental Bittersweet, Shrubby Bittersweet, and Waxwork. Here’s some common plants with poisonous berries. Oriental Bittersweet [image credit: iStock] 2. Bittersweet nightshade belongs to the nightshade family, which is known for being poisonous. All parts of the plant can be toxic to humans … Celastrus orbiculatus is a woody vine of the family Celastraceae. These vines all have very recognizable leaves, but importantly for winter identification, they also all have tendrils on their vines. This vine is invasive in parts of North America. It has colorful, orange fruits that are the size of a pea. It is commonly called Oriental bittersweet, as well as Chinese bittersweet, Asian bittersweet, round-leaved bittersweet, and Asiatic bittersweet.It is native to China, where it is the most widely distributed Celastrus species, and to Japan and Korea. The flowers, fruits, and seeds are poisonous to humans, cats, and dogs if ingested.   Many yards across North America have some bittersweet nightshade weeds growing in them, typically along a fence. There are three other common vines in our forests: Virginia creeper, woodbine (often confused with Virginia creeper) and poison ivy. While not as toxic as its cousin belladonna, bittersweet nightshade is poisonous to pets and can be deadly to children who eat its brilliant red berries. The fruit and seeds have a somewhat confirmed history of being mildly toxic for humans, while rabbits, squirrels and birds can eat them with impunity. Solanum dulcamara is a species of vine in the potato genus Solanum, family Solanaceae.Common names include bittersweet, bittersweet nightshade, bitter nightshade, blue bindweed, Amara Dulcis, climbing nightshade, fellenwort, felonwood, poisonberry, poisonflower, scarlet berry, snakeberry, trailing bittersweet, trailing nightshade, violet bloom, and woody nightshade. 1 Oriental Bittersweet (Celastrus orbiculatus) The flowers, fruits, and seeds are poisonous to humans, cats, and dogs if ingested. Older bittersweet vine bark is sometimes confused with ash tree bark. The berries contain cardiogenic toxins—the most poisonous part of the plant—which can have an immediate sedative effect on cardiac muscle tissue. Melanie Shaw / Flickr / CC BY-ND 2.0. 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