Cuscuta campestris Yunck

Дата канвертавання22.04.2016
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Cuscuta campestris Yunck.

Current Status


Proposed Status (click for definitions)


Proposed by:

Daisy Daeschler, Ann Rhoads, and Tim Block

Morris Arboretum of the University of Pennsylvania


Cuscuta campestris is a parasitic flowering plant that grows on other herbaceous species including Lythrum salicaria, Artemisia vulgaris, Persicaria hydropiperoides, Persicaria pensylvanica, Persicaria punctata, Schoenoplectus pungens, Amaranthus cannabinus, Boehmeria cylindrica, Urtica dioica, Humulus japonicus, Acalypha rhomboidea, Conyza canadensis, Bidens spp., Ambrosia artemisifolia, Helenium autumnale, Hedyoma pulgeoides, Perilla frutescens, and Lycopus sp. It typically grows in open shoreline situations or other open habitat that is moist to seasonally wet.

Estimated number of extant occurrences

(30) 35 – 60 (50)

Estimated number of extant individuals

(30) 50 – 100 (50) Genets

Factors that increase conservation concern

Habitat very susceptible to degradation due to non-native, invasive species

A trend toward tidiness i.e. excessive mowing in public areas could reduce habitat.

Although several sites along the Delaware River are small public parks, mowing or "weed control" along edges could eliminate habitat for Cuscuta.

Populations tend to be very small, often a single colony about 1 meter square. It is impossible to determine how many genets a colony represents.

Additional factors not logically included on other worksheets


Factors that decrease conservation concern

Habitat is mostly wetlands or riparian areas.

Cuscuta campestris parasitizes a wide variety of native and non-native herbaceous plants.

Cuscutas are difficult to identify to species and may have been under collected in the past for that reason; however, C. gronovii has been widely collected in PA (see Rhoads and Klein 1993).

Cuscuta campestris is the most widespread dodder in the world; it is the only example of a parasitic weed of North America that has spread to the Old World (Duke, S. 1994. Reviews of Weed Science Vol. 6. Weed Science Society of America, Champaign, Il).

Protection of wetlands and riparian areas should provide stability.

General interest in protecting and even restoring riparian corridors should work in favor of this species.

Additional factors not logically included on other worksheets


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