Calochortus indecorus - Ownbey & M.E. Peck
Sexton Mountain Mariposa Lily
Taxonomic Status: Accepted
Related ITIS Name(s): Calochortus indecorus Ownbey & M.E. Peck (TSN 42851)
Unique Identifier: ELEMENT_GLOBAL.2.158363
Element Code: PMLIL0D0L0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Lily Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Liliales Liliaceae Calochortus
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Calochortus indecorus
Taxonomic Comments: Recognized as a distinct species by Kartesz (1994 checklist and 8/98 review draft), and by various other publications.
Conservation Status
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NatureServe Status

Global Status: GX
Global Status Last Reviewed: 10Nov1997
Global Status Last Changed: 03Jan1986
Rounded Global Status: GX - Presumed Extinct
Reasons: Known only from the type collection made by Morton Peck in 1948 on Sexton Mountain in southern Oregon. Subsequent construction of Interstate 5 probably destroyed the population, which was almost certainly the only one in the world (the serpentine flora of Oregon has been quite well studied, and the species has never been found elsewhere). Botanists have made numerous intensive, but unsuccessful, attempts to relocate the species.
Nation: United States
National Status: NX

U.S. & Canada State/Province Status
United States Oregon (SX)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Only known from type locality (Sexton Mountain, Oregon), where last seen in 1948.

Number of Occurrences: 0 (zero)
Number of Occurrences Comments: No existing populations known.

Overall Threat Impact Comments: Construction of an interstate freeway (I-5) may have destroyed the population.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Only known from type locality (Sexton Mountain, Oregon), where last seen in 1948.

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States ORextirpated

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
OR Josephine (41033)*
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
17 Lower Rogue (17100310)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A perennial herb. The flowering stems were 8-12 cm tall, usually shorter than the single basal leaf and about the same height as the single stem leaf. The flower petals were showy, bright lavender-blue in color, and nearly hairless (unlike the conspicuously hairy petals of most species in the genus). Known to have been in flower in May.
General Description: This lily-like plant has one or two stout 3-5 inch tall (8-12 cm) bloom stalks with 2 to 3 bright lavender upright flowers on each. Short purple hairs are found near the base of the petals. Sepals have no distinct color. Capsules nod, are ovoid and less than 3/4 inch long. The basal leaf is as long as the bloom stalk and 1/3 inch wide (8-10mm). There is a stem leaf just below the blooms that is 3 to 4 inch long by 1/10 inch wide (3mm).
Technical Description: Bulb ovoid, with thick dark coat, 2-2.5 cm long; stem not bulbiferous, erect or ascending, 8-12 cm high below the inflorescence; basal leaf 2-2.5 dm long, 8-10 mm wide, long-acuminate, the single cauline leaf closely subtending the inflorescence, 8-10 cm long, about 3 mm wide; umbels commonly 2, 2- or 3-flowered, with sometimes a third umbel from the axil of the basal leaf; bracts about 2.5 and 6 cm long; pedicels rather stout, 4-5 cm long; sepals broadly lanceolate, somewhat shorter than the petals and without distinctive coloring; petals broadly obovate, finely erose, bright lavender, glabrous on the inner face except for a scant zone of short purple hairs above the gland; gland little depressed, covered below by the minutely denticulate membrane, but otherwise naked; anthers oblong, acutish or obtuse, much shorter than the slender filaments: capsule ovoid, 1.5-2 cm long, narrowly 3-winged, strongly nodding. (Peck, 1961)
Habitat Comments: Rocky, serpentine substrates. Probably in woodlands with grassy openings.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 03Jan1986
NatureServe Conservation Status Factors Author: Yamamoto, S. (1986), rev. Maybury/Vrilakas (1997)

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Flora of North America Editorial Committee. 2002a. Flora of North America North of Mexico. Vol. 26. Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York. xxvi + 723 pp.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Meinke, R.J. 1982. Threatened and Endangered Vascular Plants of Oregon: An Illustrated Guide. U.S. Fish and Wildlife Service, Region 1, Portland, Oregon. 326 pp.

  • Peck, M.E. 1954. Notes on certain Oregon plants with description of new varieties. Leaflets of Western Botany 7(7): 177-200.

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