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Cuscuta Linnaeus. Dodder.

Key to Cuscuta

A genus of about 200 species, parasitic, achlorophyllose annual or perennial herbs, nearly cosmopolitan. Variously treated as a monogeneric family, or as a component of the Convolvulaceae; Neyland (2001) and Stefanović, Krueger, & Olmstead (2002) provide molecular evidence for the treatment of Cuscuta as a derived member of Convolvulaceae. Hadač & Chrtek (1970) suggested that Cuscuta should be separated into 4 genera based on chromosome number, morphology, and distribution; if followed, all our native species would be in Grammica and Cuscuta, with Monogynella represented by a few introduced species.

Key advice:Corolla measurements are from the base to the sinuses of the corolla. The infrastaminal scales are transparent structures at the base of the stamens.

Ref: Costea & Nesom (2023) In Flora of North America Editorial Committee (2023c); Costea et al. (2023); Costea, Nesom, & Stefanović (2006a); Costea, Nesom, & Stefanović (2006b); Costea, Nesom, & Stefanović (2006c); Floden & Brant (2018); Gandhi, Thomas, & Hatch (1987); Hadač & Chrtek (1970); Musselman (1986); Neyland (2001); Spaulding (2013a); Stefanović, Krueger, & Olmstead (2002); Williams, Tippery, & Les (2022); Yuncker (1921); Yuncker (1965). Show full citations.

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Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Keith Bradley | Cuscuta pentagona | Original Image ⭷
image of plant© Gary P. Fleming | Cuscuta coryli | Original Image ⭷
image of plant© Richard & Teresa Ware | Cuscuta harperi CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Keith Bradley | Cuscuta compacta | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Nathan Aaron, some rights reserved (CC BY), uploaded by Nathan Aaron | Cuscuta glomerata source | Original Image ⭷
image of plant© Stan Gilliam | Cuscuta gronovii | Original Image ⭷
image of plant© Alan M. Cressler | Cuscuta rostrata | Original Image ⭷
image of plant© Keith Bradley | Cuscuta americana | Original Image ⭷
image of plant© Gary P. Fleming | Cuscuta compacta | Original Image ⭷

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