Caesarweed USDA PLANTS Symbol: URLO
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Urena lobata L.

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Taxonomic Rank: Magnoliopsida: Malvales: Malvaceae
Synonym(s): Caesarweed, aramina, Caesar weed, chosuched e kui, dadangsi apaka, hibiscus burr, jute africain

Appearance
Urena lobata is an erect shrub that grows up to 10 ft. (3 m) in height. The plant is single stalked, with free-branching stems that comprise a bushy appearance. It grows as an annual species in many areas of Florida but may perennate in south Florida.
Foliage
The leaves are palmately lobed, pubescent with stellate hairs, and 1.6-3.1 in. (4-8 cm) long.
Flowers
Flowers are borne in axillary clusters, pinkish-violet, about 0.4 in. (1 cm) across.
Fruit
Fruit is pubescent with hooked bristles or barbs that cling to clothing or fur.
Ecological Threat
Urena lobata invades disturbed areas, pastures, eroded areas, and perennial crop plantations. Urena lobata tolerates salt spray but does not grow in saturated soils. Having an aggressive habit, this weed grows rapidly and can reach 2-7 ft. (0.6-2.1 m) by the end of the first year.

Identification, Biology, Control and Management Resources

Selected Images from Invasive.orgView All Images at Invasive.org


Plant(s);
Tony Pernas, USDI National Park Service, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Tony Pernas, USDI National Park Service, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Vladimir Dinets, University of Miami, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

U.S. National Parks where reported invasive:
Haleakala National Park (Hawaii)



Invasive Listing Sources:
Archbold Biological Station
Faith Campbell, 1998
Florida Exotic Pest Plant Council
Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
University of Hawaii, Botany Department, Hawaiian Alien Plant Studies, 1998