Chimaphila umbellata

Flora of North America Editorial Committee (vol. 8, 2009) recognizes two varieties in Chimaphila umbellata: C. umbellata ssp. umbellata (the taxon which occurs across most of the species' range) and C. umbellata ssp. domingensis (of Hispaniola). FNA's C. umbellata ssp. umbellata includes C. umbellata ssp. acuta, C. umbellata ssp. cisatlantica, and C. umbellata ssp. occidentalis.

Chimaphila umbellata occurs in dry coniferous forests of North America, Eurasia, the West Indies (in Hispaniola), Mexico, and Central America. There are over 3,000 occurrences rangewide, which are threatened by logging, wildfire, over-collection for medicinal or commercial purposes, rights-of-way maintenance, invasive species, recreation, and development. Little is known about trends, but with a large range extent, high number of occurrences, abundant habitat, broad habitat preferences, and no obvious intrinsic vulnerabilities, this species is considered secure.

Chimaphila umbellata is widespread in North America, Eurasia, the West Indies (in Hispaniola), Mexico, and Central America (FNA 2009). In North America, it occurs from Alaska, Yukon, and the Northwest Territories east to Maine and Newfoundland, south to South Carolina, north to South Dakota, and in all western United States (FNA 2009, Weakley and the Southeastern Flora Team 2024). The range extent of Chimaphila umbellata was estimated to be well over 2.5 million square kilometers using herbarium specimens and photo-based observations documented between 1993 and 2024 (GBIF 2024, iNaturalist 2024, SEINet 2024). See individual entries for distribution details about the two subspecies.

By applying a 1 km separation distance to herbarium records and photo-based observations documented between 1993 and 2024, there are estimated to be over 3,000 occurrences (GBIF 2024, iNaturalist 2024, SEINet 2024).

Chimaphila umbellata requires an organic litter layer of needles or leaves and grows best in rich, undisturbed soils. Therefore, any activities resulting in soil disturbance or soil compaction can be a threat (Tilford 1998). Similarly, logging would be detrimental for this shade-loving plant. Chimaphila umbellata has a variable response to fire, depending on fire intensity and duration. Intense fires in the dry season could pose a formidable threat to this species, which is inherently slow-growing and slow-propagating (Matthews 1994, Vance et al. in press). Another potential threat to wild populations may be harvesting plants for flavorings for soft drinks. Reportedly, this species has been an ingredient in soft drinks and has been harvested from the wild in relatively large quantities (Tilford 1998, Moore 1978). It is also commercially available in the herbal and floral markets (Vance et al. in press). This species is on the United Plant Savers "To Watch" list. Some experts in the medicinal plant industry have suggested that trade is medium to large and demand has increased over the past ten years (Robbins 1999). Additional potential threats to this species include rights-of-way maintenance, invasive species, recreation, and development.