Elymus svensonii - Church
Svenson's Wild Rye
Taxonomic Status: Accepted
Related ITIS Name(s): Elymus svensonii G.L. Church (TSN 502281)
Unique Identifier: ELEMENT_GLOBAL.2.138939
Element Code: PMPOA2H0J0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Grass Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Cyperales Poaceae Elymus
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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: Elymus svensonii
Conservation Status
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NatureServe Status

Global Status: G3
Global Status Last Reviewed: 07Nov2003
Global Status Last Changed: 07Nov2003
Rounded Global Status: G3 - Vulnerable
Reasons: A regional endemic of riverbanks and limestone bluffs in central Kentucky and middle Tennessee. 25 new sites were discovered in 1995 along precipitous cliffs of the Kentucky River. Because of the difficultly in accessing these sites, it is uncertain whether these are a large continuous population (if so, the species may be fairly secure) or scattered, smaller populations.
Nation: United States
National Status: N3

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Kentucky (S2S3), Tennessee (S2)

Other Statuses

NatureServe Global Conservation Status Factors

Other NatureServe Conservation Status Information

Distribution
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U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
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U.S. & Canada State/Province Distribution
United States KY, TN

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
KY Adair (21001), Estill (21065), Fayette (21067), Franklin (21073), Garrard (21079), Jessamine (21113), Mercer (21167), Owen (21187), Woodford (21239)
TN Davidson (47037), DeKalb (47041), Hickman (47081), Putnam (47141), Smith (47159), Trousdale (47169)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
05 Upper Kentucky (05100204)+, Lower Kentucky (05100205)+, Upper Green (05110001)+, Upper Cumberland-Cordell Hull (05130106)+, Caney (05130108)+, Lower Cumberland-Old Hickory Lake (05130201)+, Lower Cumberland-Sycamore (05130202)+, Stones (05130203)+
06 Lower Duck (06040003)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A tuft-forming perennial grass, 7-11 dm tall.
General Description: A tuft-forming, perennial grass, 7-11 dm tall, growing from diffuse-fibrous roots. The leaves are smooth, bluish-waxy looking, 6 to 8 per culm. The sheaths are mostly overlapping, pale green to straw-colored to pink; blades are 1.5-3 dm long, spreading or erect. The flowers are arranged in spikelets attached directly to the stem in pairs, in a spike- like inflorescence about 10-17 cm long and 0.5-1.0 cm thick. The fruit is an oblong brown grain about 0.5 cm long.
Technical Description: A tuft-forming, non-rhizomatous, perennial, glaucous grass, 7-11 dm tall, from diffuse-fibrous roots. The leaves are smooth, bluish-waxy looking, 6 to 8 per culm, the sheaths mostly overlapping, pale green to straw-colored to pink; blades 1.5-3 dm long, spreading or erect, the lowest withered by bloom-time, flat except for the long, slender rolled tips; the margins minutely rough; upper surface deep green, the lower paler, smooth, finely raised-ribbed. The flowers consist of a series of specialized leaves or bracts arranged in spikelets, these numerous, attached directly to the stem in pairs, in a spike-like inflorescence about 10-17 cm long and 0.5-1.0 cm thick (not including the spreading awns); the spikelets 4- or 5-flowered, erect (paralleling the stem), only 3 of the 4 fertile, the upper one sterile. The fruit is an oblong brown grain about 0.5 cm long.
Habitat Comments: Limestone bluffs in areas of shallow soils, especially on rocky slopes and ledges where it gets full sun or perhaps some light shade. Often found along river corridors. Will also occupy freshly disturbed areas such as road cuts.
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: 25Nov1996
NatureServe Conservation Status Factors Author: M. Pyne, D. White, K. Maybury (1996)

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
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  • Chester, E.W., B.E. Wofford, R. Kral, H.R. DeSelm, and A.M. Evans. 1993. Atlas of Tennessee vascular plants: Vol. 1. Pteridophytes, Gymnosperms, Angiosperms: Monocots. Austin Peay State Univ., Clarksville, Tennessee. 118 pp.

  • Church, G.L. 1967. Taxonomic and genetic relationships of the eastern North American species Elymus with setaceous glumes. Rhodora 69(778): 121-162.

  • 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.

  • Kral, R. 1983a. A report on some rare, threatened or endangered forest related vascular plants of the south. USFS technical publication R8-TP2, Atlanta, GA. Vol. 1: 718 pp.

  • Kral, R. 1983c. A report on some rare, threatened, or endangered forest-related vascular plants of the South. U.S. Dept. of Agriculture Forest Service Technical Publication R8-TP2, Athens, GA. 1305 pp.

  • Pyne, M., M. Gay, and A. Shea. 1995. Guide to rare plants - Tennessee Division of Forestry District 4. Tennessee Dept. Agriculture, Division of Forestry, Nashville.

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