Species: Spiranthes diluvialis

Ute Ladies'-tresses
Species
Plants

Ute Ladies' Tresses is a perennial orchid with usually 1 stem that is 20-50 cm tall and arising from tuberously thickened roots. Its narrow leaves are 1 cm wide, can reach 28 cm long, are longest at their base, and persist during flowering. The inflorescence consists of few to many white or ivory flowers clustered in a spike of 3-rank spirals at the top of the stem. The sepals and petals are ascending or perpendicular to the stem. The lateral sepals often spread abruptly from the base of the flower, and sepals are free or only slightly connate at the base. The lip petal is somewhat constricted at the median.

Source: Encyclopedia of Life

Kingdom
Plantae
Phylum
Anthophyta
Class

Monocotyledoneae

Order

Orchidales

Family

Orchidaceae

Genus

Spiranthes

Natureserve Explorer
Source:
ELEMENT_GLOBAL.2.129296
Classification
Other Global Common Names
Ute ladies'-tresses - spiranthe des terrains inondés
Informal Taxonomy
Plants, Vascular - Flowering Plants - Orchid Family
Formal Taxonomy
Plantae - Anthophyta - Monocotyledoneae - Orchidales - Orchidaceae - Spiranthes - Taxonomic studies have confirmed hybrid origin and taxonomic distinctiveness (Arft and Ranker 1998, Szalanski et al. 2001).

Ute Ladies' Tresses is a perennial orchid with usually 1 stem that is 20-50 cm tall and arising from tuberously thickened roots. Its narrow leaves are 1 cm wide, can reach 28 cm long, are longest at their base, and persist during flowering. The inflorescence consists of few to many white or ivory flowers clustered in a spike of 3-rank spirals at the top of the stem. The sepals and petals are ascending or perpendicular to the stem. The lateral sepals often spread abruptly from the base of the flower, and sepals are free or only slightly connate at the base. The lip petal is somewhat constricted at the median.

Source: Encyclopedia of Life

Short General Description
A perennial herb with a flowering stem, 2-5 dm tall, arising from a basal rosette of grass-like leaves. The flowers are ivory-colored, arranged in a spike at the top of the stem. Blooms mainly from late July through August.
Reproduction Comments
Across its range <i>Spiranthes diluvialis</i> blooms from early July to late October. Asynchronous maturation of flowers promotes outcrossing, but flowers are self-compatible (Fertig et al. 2005).
NatureServe Global Status Rank
G2G3
Global Status Last Reviewed
2008-05-06
Global Status Last Changed
2008-05-06
Other Status

LT - LT: Listed threatened - 1992-01-17

Conservation Status Map
<img src="http://www.natureserve.org/explorer/servlet/GetMapGif?CA.BC=S1&US.CO=S2&US.ID=S1&US.MT=S1&US.NE=S1&US.NV=S1&US.UT=S1&US.WA=S1&US.WY=S1" alt="Conservation Status Map" style="width: 475px; height: auto;" />
Global Range
Adapted from Fertig et al. (2005): Known from northern and south-central Utah, central to north-central and northwestern Colorado, east-central and southeastern Wyoming, eastern Idaho, southwestern Montana, eastern Nevada, western Nebraska, and central to north-central Washington, as well as British Columbia, where recently discovered (J. Penny, pers. comm. 2008). Occurs in at least 33 counties in the United States as well as at one site in British Columbia. Utah has the largest number of extant EOs and the highest number of reported plants, followed by Colorado. Using a minimum convex polygon to estimate the range (i.e. without attempting to exclude "extreme discontinuities"), range extent is approximately 900,000 square km.
ELEMENT_GLOBAL.2.129296