Xanthosoma sagittifolium
Common Name(s): Elephant ear
Non-Native to Florida
Origin: Northern South America1
This species appears on the following legally prohibited plant lists
| Federal Noxious Weed List | Florida Noxious Weed List | Florida Prohibited Aquatic Plants List |
| No | Yes | No |
UF/IFAS Assessment of Non-Native Plants in Florida’s Natural Areas
CATEGORY II on the Florida Exotic Pest Plant Council’s (FLEPPC) 2017 List of Invasive Plant Species
Download a page (PDF) from Identification and Biology of Nonnative Plants in Florida’s Natural Areas – Second Edition1
For brief control information, see Efficacy of Herbicide Active Ingredients Against Aquatic Weeds (EDIS Pub #SS-AGR-44)
Elephant ear & Taro
Management Plan
Introduction
Central and South Americans use the tubers of elephant ear tubers in various meals. The tuber is one of the most popular foods in the country and provides a basic diet for many. The tubers can be harvested and stored for several weeks if refrigerated. Elephant ear is cultivated in many of the Central and South American countries. Taro is native to Africa and was brought as a food crop for slaves. It is also widely eaten in many areas of the Pacific.
Description
Both elephant ear and taro are herbaceous perennials with large leaves up to 6 feet in length. The common name was given because of its large, elephant ear-like leaves. Taro can be distinguished from elephant ears by the attachment of the leaf from the petiole. In taro, the petiole attaches to the leaf several inches from the base of the ‘V’ of the leaf, while the petiole is attached directly at the base in elephant ears. The leaves are light green for elephant ear and darker green in color for taro. Both have arrow-shaped leaves with long petioles and wavy margins. Elephant ear plants can grow up to 9 feet in height, while taro is much shorter – rarely reaching 4 feet tall. Leaves are produced from corms which are underground bulblike structures. Rhizomes give rise to offshoots that extend from the corm.
Impacts
Both species are found in swamps and along stream banks. The large leaves may shade and prevent regeneration of desired species. Taro is more wide spread and can frequently be observed along the shorelines of many central Florida lakes.
Management
Preventative
The first step in preventative control of elephant ear and taro is to limit planting and removal of existing plants within the landscape.
Cultural
Plant native or non-invasive alternatives.
Mechanical
Dig out corms from the soil. Take care when cutting, as the leaves contain oxalic acid, which may cause irritation to exposed skin.
Biological
Elephant ear has no known biological control agents.
Chemical
Chemicals with known control are limited. Repeated applications of glyphosate (2% solution) with a surfactant may be effective, especially if coupled with other management strategies.
References and Useful Links
USDA Natural Resources Conservation Service. Plants Database
Invasive Plants of the Eastern United States
University of Florida Center for Aquatic and Invasive Plants
University of Florida’s Cooperative Extension Electronic Data Information Source
Langeland, K.A. and K. Craddock Burks. 1998. Identification and Biology of Non-Native Plants in Florida’s Natural Areas. IFAS Publication SP 257. University of Florida,
Gainesville. 165 pp.
The Plant Conservation Alliance’s Alien Plant Working Group. Weeds Gone Wild: Alien Plant Invaders of Natural Areas
Pacific Island Ecosystems at Risk (PIER). Plant Threats to Pacific Ecosystems
Excerpted from
University of Florida, IFAS Extension, Circular 1529, Invasive Species Management Plans for Florida, 2008 by
Greg MacDonald, Associate Professor Jay Ferrell, Assistant Professor and Extension Weed Specialist
Brent Sellers, Assistant Professor and Extension Weed Specialist
Ken Langeland, Professor and Extension Weed Specialist Agronomy Department, Gainesville and Range Cattle REC, Ona
Tina Duperron-Bond, DPM – Osceola County
Eileen Ketterer-Guest, former Graduate Research Assistant
Description modified January 2014 using Citation #1 below
More Resources
View the herbarium specimen image from the University of Florida Herbarium Digital Imaging Projects.
Citations
1. Identification and Biology of Nonnative Plants in Florida’s Natural Areas – Second Edition, by K.A. Langeland, H.M. Cherry, et al. University of Florida-IFAS Publication # SP 257. 2008.