New vehicle fuel efficiency (based on model year production) and CAFE standards: U.S. Department of Transportation, National Highway Traffic Safety Administration, Summary of Fuel Economy Performance (Washington, DC: Annual Issues), available at http://www.nhtsa.gov/fuel-economy as of Mar. 3, 2016.
Thorns. Though the berries are the most toxic portion of the foxtail fern, the plant itself is dangerous for animals to eat because of its spiky, thorny structure. Its thorns and spiky leaves can scape the inside of an animals mouth and throat.ymptoms if Ingested. Though the berries are more poisonous than the plant itself, neither should be ingested by an animal. Common symptoms after ingesting foxtail fern include diarrhea, vomiting, and abdominal pain.
10 Reasons to Love the Foxtail Fern. 1  There is no trimming or pruning (as is necessary for hedges or roses). 2  A mature plant will grow to 6 to 8 feet across, but new plants will stay about 3 or 4 feet across for 12 years or more. 3  For the 32 years I have had my plant (pictured), pests have not attacked or diminished its health.