Christmas Green vs Zeiller'S Clubmoss

Diphasiastrum complanatum compared with Diphasiastrum zeilleri

Key Differences

Christmas Green is Least Concern while Zeiller'S Clubmoss is Vulnerable.

Taxonomic Classification

Rank	Christmas Green	Zeiller'S Clubmoss
Kingdom same	Plantae (पादप)	Plantae (पादप)
Phylum same	Tracheophyta	Tracheophyta
Class same	Lycopodiopsida (Lycopodiopsida)	Lycopodiopsida (Lycopodiopsida)
Order same	Lycopodiales (Lycopodiales)	Lycopodiales (Lycopodiales)
Family same	Lycopodiaceae	Lycopodiaceae
Genus same	Diphasiastrum	Diphasiastrum
Species	Diphasiastrum complanatum	Diphasiastrum zeilleri

Evolutionary Relationship

Christmas Green and Zeiller'S Clubmoss share a common ancestor at the Genus level: Diphasiastrum.

View Genus: Diphasiastrum

Conservation Status

Christmas Green

LC — Least Concern

Zeiller'S Clubmoss

VU — Vulnerable

Physical Characteristics

Attribute	Christmas Green	Zeiller'S Clubmoss
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Christmas Green

Habitat

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

Range

Widely distributed across Europe (France, Luxembourg, Norway), North America (Canada, United States), and South America (Colombia).

Zeiller'S Clubmoss

Habitat

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

Range

Distributed across Canada, Norway, and United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Christmas Green

Christmas green (Lycopodium obscurum) is a terrestrial clubmoss in the family Lycopodiaceae, native to eastern North America and parts of eastern Asia. It is one of the most recognizable clubmosses in North American forests, forming upright, tree-like shoots that superficially resemble miniature conifer saplings. The species grows in moist, cool deciduous and mixed forests, often on acidic, humus-rich soils. Lycopodium obscurum reproduces via spores produced in terminal strobili — cone-like structures at the tips of upright branches. Clubmosses are ancient vascular plants with a lineage extending back over four hundred million years, representing one of the earliest groups of land plants to evolve vascular tissue. They are not true mosses but belong to the lycophytes, a separate lineage from ferns and seed plants. Christmas green has historically been harvested extensively for holiday decorations and wreaths due to its evergreen, decorative appearance and the fact that cut branches remain fresh for extended periods. Over-harvesting in the twentieth century significantly reduced populations in accessible areas of the eastern United States. Clubmosses reproduce and grow slowly, making them vulnerable to over-collection. Ethical wildcrafting guidelines recommend sparing collection to allow populations to recover.