San Elijo Lagoon has some fascinating forms of plants and wildlife in this lagoon, but some of the plants can be dangerous so here are just 3 plants that can cause some adverse effects if ingested or touched.
Jimson Weed (Datura stramonium) is a low growing plant that is native to this island but actually came from Mexico but somehow became a native plant. This is a dangerous plant as if you consume it can cause some hallucinogenic effect that can wreak havoc on your nervous system. This plant is also very toxic to pets as well. The name Datura comes from the name Dhatura in Arabic. This plant contains tropanes, such as atrophine. The name Jimson weed is noted when British soldiers ate this plant and acted like insane people.
Tree Tobacco (Nicotiana glauca).
Tree Tobacco is a shrub that goes up to 20′ long but is not actually native to the San Elijo Lagoon. The nectar also provides a nice treat for hummingbirds. This plant is popular with the native indians who like to smoke it and use to treat sore throats, however it should not be consumed raw.
Poison Oak (Toxicodendron diversilobum).
This is a very famous thing that you should avoid. If you touch this plant, you will most likely get a rash. This is a California native plant which grows in Riparian habitats. If you get a rash from this plant, you can easily use soap and water ASAP to try and get rid of it, but the local pharmacies also carry some cream that should be carried in order to help with the rash. Some transition zones have this plant. Poison Oak can even give you some issues if its burning.
These are just some of the dangerous plants or plants in general in the San Elijo Lagoon.