E-Flora BC: Electronic Atlas of the Flora of British Columbia

Spiranthes diluvialis Sheviak
Ute lady's tresses
Orchidaceae (Orchid family)

Introduction to Vascular Plants

Distribution of Spiranthes diluvialis
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Introduction

There are two species of ladies' tresses in British Columbia: hooded ladies' tresses (Spiranthes romanzoffiana) and Ute ladies' tresses (S. diluvialis). Ute ladies' tresses is a recent addition to the flora of British Columbia and Canada. It was first reported for the province by Curtis Bjork and Terry McIntosh on the east shore of Lake Osoyoos in 2008. It had been found previously by O. and G. Westby at Mahoney Lake in 2006, but not recognized at the time as a distinct species. Along Osoyoos Lake, it grows in association with Carex viridula Michx. and/or Eleocharis rostellata (Torr.) Torr. (Bjork et al. 2008). It is also found within a band of grasses and sedges along Mahoney Lake.

Note Authors: T. McIntosh and R. Klinkenberg.

Similar Species

Spiranthes diluvialis is most similar to Spiranthes romanzoffiana. It may be distinguished by "its longer and denser hairs in the inflorescence, and its lack of a distinctly flared distal portion of the lip (Sheviak & Brown 2002)" (Bjork et al. 2008). Unlike Spiranthes romanzoffiana, it grows in diverse habitats. However it shows preference for calcareous or moderately saline, seasonally wet soils: it is not found in bogs or fens (Bjork et al. 2008)

Note Authors: T. McIntosh and R. Klinkenberg.

Status Information

Origin Status	Provincial Status	BC List (Red Blue List)	COSEWIC
Native	S1	Red	E (Dec 2018)

BC Ministry of Environment: BC Species and Ecosystems Explorer, the authoritative source for conservation information in British Columbia.

Synonyms and Alternate Names

Spiranthes romanzoffiana var. diluvialis (Sheviak) S.L. Welsh

Taxonomic and Nomenclatural Links

Flora North America treatment for Orchidaceae
Flora North America treatment for Spiranthes diluvialis
Genetic information (NCBI Taxonomy Database)
International Plant Names Index
Taxonomic Information from the World Flora Online
Integrated Taxonomic Information System

Additional Range and Status Information Links

Burke Museum of Natural History (Washington State records)
CalFlora
Consortium of Pacific Northwest Herbaria records
Jepson Interchange
NatureServe Explorer
USDA

Additional Photo Sources

Images From CalPhoto
UT Austin's Native Plant Database
Google Image Search
Flickr Image Search

Species References

Bjork, Curtis, Terry McIntosh and Ron Hall. 2008. Vascular plants new to British Columbia from the southern Okanagan Valley. Botanical Electronic News 391.

General References

Google Scholar Search
Family References
General Botanical References for BC

Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2024-05-16 9:15:59 PM ]

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