Ute Ladies’ Tresses-Orchids in Utah

Orchids in Utah: Ute Ladies' Slippers (Spiranthes diluvialis) Courtesy of the U.S. Fish and Wildlife Service, Lindstrom, Photographer
Ute Ladies’ Slippers (Spiranthes diluvialis)
Courtesy U.S. Fish and Wildlife Service
Lindstrom, Photographer
What is it about orchids in our desert state that excites me so? Perhaps its finding them so far removed from their usual tropical biome, or their uncommon beauty. I was surprised to discover that Utah has at least 16 native species of orchids. Most occur in moist, higher elevations, but a few are found in our valley bottoms.

I rejoice at spotting the first white bog orchid or striped coral root as I hike mountain trails. In the Uintah’s you may find the gorgeous Calypso orchid- also called lady slipper, perhaps my favorite. Now, the late season rattlesnake plantain is in full bloom.

Further, I was amazed to find orchids species diversity second only to the composites with orchids hosting 28 thousand species!

Last evening, I joined 8 others with the Bear River Land Conservancy near Mendon to survey a wet meadow for the late blooming Ute Ladies Tresses, a fragile beauty placed on the EPA Threatened Species list in 1992. Shrinking habitat, limited reproduction, over collection, competition from exotic weeds, and herbicides are the main threats. Other threats include impacts from recreation; mowing for hay production, grazing by cattle or horses; hydrology alteration, herbivory by native wildlife (especially meadow voles); reduction in the number and diversity of insect pollinators; drought; and conflicting management with other rare species.

Regarding reproduction, their minute seeds contain little stored food to sustain embryos and are probably short-lived in the soil. Recent attempts to germinate them took up to 1.5 years. It is hypothesized that germinated seedlings must quickly establish a symbiotic relationship with mycorrhizal soil fungi in order to survive. The absence or rarity of appropriate fungal symbionts in the soil may be a major factor limiting the establishment of new Ute ladies’- tresses populations. On a more positive note, under favorable conditions, they have extreme longevity living beyond 50 years.

Bees are their primary pollinators, particularly solitary bees in the genus Anthophora, bumblebees, and occasionally non-native honeybees. Long-term monitoring studies indicate that the relative abundance and composition of the available bee fauna varies from year to year, which may impact overall fruit production rates for the Ladies Tresses.

Orchids have vast cultural connections in art a literature. They are revered as the national flower for several countries and cities. Reading “The Orchid Thief” by Susan Orlean gave me insights into the very lucrative business world surrounding this coveted flower.

For more, visit The Utah Orchid Society and Utah Native Plant Society websites for further information and plan to join them for their frequent outings.

This is Jack Greene reading and writing for Wild About Utah.

Images: Courtesy and Copyright
Text: Jack Greene, Bridgerland Audubon Society
Additional Reading:

MOUNTAIN PLANTS OF NORTHEASTERN UTAH, Original booklet and drawings by Berniece A. Andersen and Arthur H. Holmgren, https://forestry.usu.edu/files/uploads/hg506.pdf


US Wildflower’s Database of Wildflowers for Utah, https://uswildflowers.com/wfquery.php?State=UT

Spiranthes diluvialis Sheviak (Ute lady’s tresses), USDA Plants Database,

Spiranthes diluvialis (Ute ladies’-tresses), Lady Bird Johnson Wildflower Center,

Spiranthes diluvialis, Missouri Botanical Garden, (Temporarily unavailable) https://www.facebook.com/missouribotanicalgarden/posts/pfbid02LUT74wA4PBr45myWNMkbSyaXmb1hUe2bnydmrCMhsKA31sobcZGUAQHrWfPJXq7tl

Spiranthes diluvialis, Intermountain Regional Herbarium Network, SEINet,

Ute ladies’-tresses (Spiranthes diluvialis), ECOS Environmental Conservation Online System, USFWS, https://ecos.fws.gov/ecp0/profile/speciesProfile?spcode=Q2WA

Conserving Rare Plants and Private Wetlands in Cache Valley, Thursday, Jun. 02, 2016, https://www.usu.edu/today/?id=55893

Spiranthes diluvialis Sheviak, Streambank Lady’s Tresses, Ute Lady’s Tresses, North American Orchid Conservation Center, https://goorchids.northamericanorchidcenter.org/species/spiranthes/diluvialis/