Cuscuta cephalanthi Engelm. - Buttonbush Dodder


 

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Cuscuta cephalanthi - (image 1 of 3)

 

Taxonomy

Family: Convolvulaceae

Habitat

Low, wet areas including fens.

Associates

Parasitic on Cephalanthus occidentalis (hence the common name), Justicia americana, Aster puniceus, Aster simplex, and Salix interior. Swink and Wilhelm (1994) also list several weedy species on which this plant has been found, including Campsis radicans, Daucus carota, and Solanum dulcamara.

Distribution

ME west to WA, south to FL and NM.

Morphology

Achlorophyllous, parasitic annual. Stems yellow to orange, glabrous, infecting host with haustoria. Leaves absent. Flowers sessile in compact clusters; perianth dull, mostly 4-merous; corolla lobes obtuse, erect, persisting on capsule; sepals united above their bases; calyx not subtended by bracts. Capsules wider than long.

Notes

Flowers August to September

Wetland Indicator: Facultative Wetland

Endangered in NY and NJ but considered a weed in many others (presumably because it is parasitic).

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY

 

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.

 

USDA, NRCS. 2002. The PLANTS Database, Version 3.5 (http://plants.usda.gov).

National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

 


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 Michael Hough 2009