Alpine Sulphur-Tresses vs Common Dodder

Alectoria ochroleuca compared with Cuscuta gronovii

Taxonomic Classification

Rank	Alpine Sulphur-Tresses	Common Dodder
Kingdom	Fungi (Fungi)	Plantae (Plants)
Phylum	Ascomycota (Sac Fungi)	Magnoliophyta (Flowering Plants)
Class	Lecanoromycetes (Lecanoromycetes)	Magnoliopsida (Dicots)
Order	Lecanorales (Lecanorales)	Solanales (Solanales)
Family	Parmeliaceae	Convolvulaceae
Genus	Alectoria	Cuscuta
Species	Alectoria ochroleuca	Cuscuta gronovii

Conservation Status

Alpine Sulphur-Tresses

LC — Least Concern

Common Dodder

LC — Least Concern

Physical Characteristics

Attribute	Alpine Sulphur-Tresses	Common Dodder
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alpine Sulphur-Tresses

Habitat

Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Colombia, Norway, Sweden, and United States.

Common Dodder

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found across Europe (11 countries) and North America (United States).

Alpine Sulphur-Tresses

The Alpine Sulphur-Tresses (Alectoria ochroleuca) is a species in the genus Alectoria. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region. Distributed across Colombia, Norway, Sweden, and United States.

Common Dodder

<em>Cuscuta gronovii</em>, the common dodder, is a parasitic annual vine in the family Convolvulaceae. This species is distributed across eleven European countries as well as the United States, where it typically inhabits diverse terrestrial environments including wetland margins, roadsides, thickets, and disturbed vegetation. Unlike most plants, <em>Cuscuta gronovii</em> lacks chlorophyll and is entirely dependent on host plants for water and nutrients, which it extracts through specialized structures called haustoria. The common dodder typically has slender, twining orange or yellowish stems and produces small, clustered white or pale pink flowers in late summer. It often parasitizes a broad range of host species, including many herbaceous and shrubby plants. Once attached to a host, it typically sheds its connection to the soil and relies entirely on the host for sustenance. The species is assessed as Least Concern, reflecting its wide distribution and ability to colonize disturbed habitats. Its parasitic life history makes it ecologically notable among flowering plants.