Print Report

CEGL001218 Salix ligulifolia Wet Shrubland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Strapleaf Willow Wet Shrubland

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This association is a medium to tall (1.5-3 m [5-15 feet]) willow shrubland occurring in saturated areas at elevations of 1424 to 3295 m (4700 -10,800 feet). It occurs in the wettest part of the riparian zone, usually adjacent to the channel on low point bars, islands, and overflow channels. At higher elevations, it occurs in relatively broad valley bottoms along low terraces and floodplains, and along streambanks of narrower reaches. At lower elevations, it occurs generally directly in the stream channel, on the rims of slickrock potholes and other wet valley bottoms. Soils are saturated sandy loams and clay loams with a high organic matter content in the upper layers. Salix ligulifolia is found in mixed stands with other willows such as Salix monticola, Salix geyeriana, and Salix drummondiana. Salix ligulifolia is the key diagnostic species; other willows may have equal cover, but in general do not exceed that of Salix ligulifolia. The herbaceous undergrowth can be dense in undisturbed stands with Carex utriculata, Carex nebrascensis, Carex pellita, Juncus arcticus ssp. littoralis, and Calamagrostis canadensis. Forb cover is generally low. ~Salix exigua - Salix ligulifolia Wet Shrubland (CEGL002655)$$ is a closely related association occurring in the Colorado foothills at lower elevations.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: The stand at Florissant Fossil Beds National Monument is borderline between the foothills ~Salix exigua - Salix ligulifolia Wet Shrubland (CEGL002655)$$ and the montane ~Salix ligulifolia Wet Shrubland (CEGL001218)$$ in Colorado. The overwhelming abundance of Salix ligulifolia (60%) to relatively low cover of Salix exigua (<10%), and the elevation (2560 m [8400 feet]) place it in the upper elevation Salix ligulifolia shrubland.

Dorn (1995) has combined Salix lutea and Salix ligulifolia (as used in Colorado literature) into Salix eriocephala. Nearly all Colorado specimens called Salix lutea and Salix ligulifolia have been placed into Salix eriocephala var. ligulifolia, which Kartesz (1999) treats as Salix ligulifolia. Salix lutea specimens found in the extreme northwestern part of Colorado (north of Dinosaur National Monument) have been renamed Salix eriocephala var. watsonii (Dorn 1995), and Salix lutea specimens from extreme northeastern Colorado (along the South Platte River near Julesberg) have been renamed Salix eriocephala var. famelica (Dorn 1995). Kartesz (1999) accepts Salix lutea and Salix ligulifolia as valid species, and places Salix eriocephala var. watsonii and Salix eriocephala var. famelica into Salix lutea. Except for those found in the extreme northwest and northeast of Colorado, Colorado specimens of Salix lutea, Salix ligulifolia, and Salix eriocephala var. ligulifolia are called Salix ligulifolia by the Kartesz (1999) treatment.

Salix lutea (sensu Welsh et al. 1987) and Salix eriocephala (sensu Welsh et al. 2003) are, according to Welsh et al., Salix ligulifolia, and thus Salix eriocephala var. ligulifolia. Dorn (1995), however, places nearly all Utah specimens in Salix eriocephala var. watsonii. To keep with local consistency, we will follow Welsh et al.''s treatment, which by Kartesz (1999) would equal Salix ligulifolia.

Several closely related Salix lutea-dominated community types occur in Montana (Hansen et al. 1995), eastern Wyoming and western Idaho (Youngblood et al. 1985a), and in Nevada (Manning and Padgett 1995). These communities would be dominated by Salix eriocephala var. watsonii, if we apply Dorn''s (1995) nomenclature.

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: This association has a canopy dominated by 15-66% cover of Salix ligulifolia (= Salix eriocephala var. ligulifolia) usually mixed with several other willow species. Salix ligulifolia is the key diagnostic species; other willows may have equal cover, but in general do not exceed that of Salix ligulifolia. Other willows that may be present include Salix monticola, Salix geyeriana, Salix bebbiana, Salix lucida ssp. lasiandra, Salix exigua, Salix wolfii, and Salix planifolia. Additional shrubs that may be present include Alnus incana, Cornus sericea, and Dasiphora fruticosa ssp. floribunda (= Pentaphylloides floribunda). The herbaceous undergrowth can be dense in undisturbed stands with Carex utriculata (1-40%), Carex nebrascensis (1-5%), Carex pellita (= Carex lanuginosa) (1-3%), Juncus arcticus ssp. littoralis (= Juncus balticus) (1-20%), and Calamagrostis canadensis (1-27%). Forb cover is generally low. Forb cover is generally low, but some species are abundant, including Taraxacum officinale, Achillea millefolium, Thalictrum fendleri, and Fragaria virginiana.

Dynamics:  Salix ligulifolia is highly palatable to livestock, therefore, season-long grazing, especially late summer and early fall browsing, should be avoided in order to maintain the vigor of woody species (Hansen et al. 1995). Overuse by livestock may cause the site to dry and become dominated by introduced grass species such as Poa pratensis or Bromus inermis (Manning and Padgett 1995). With continued overuse, the willow species will decline and eventually become eliminated from the site (Hansen et al. 1995). Beaver can be important in maintaining this plant association. Beaver dams raise the water table, which is beneficial to willow and sedge species as well as other hydrophytic plants. Beaver dams also help control bank erosion, channel downcutting, and the loss of sediment downstream (Hansen et al. 1995).

Prescribed fires may be useful for rejuvenating Salix ligulifolia since this willow vigorously sprouts after burning, especially in wetter areas (Hansen et al. 1995). Willow roots provide streambank stability and should be considered by managers for streambank restabilization projects and revegetation purposes (Hansen et al. 1995, Padgett et al. 1989).

This association appears to be long-lived, mid- to late-seral type since stands are associated with beaver activity and saturated soils throughout the growing season.

Environmental Description:  This willow association occurs in the southern Rocky Mountains and on the Colorado Plateau in moderately wide valleys along low terraces and floodplains, and streambanks of narrower reaches. The plant association occurs along reaches with vegetated islands between multiple channels below an active beaver pond (Rosgen''s Channel Type: D3), along slightly sinuous broad channels (Rosgen''s Channel Type: B2, B4), along more sinuous channels with well-developed floodplains (Rosgen''s Channel Type: C4), and along steep narrow gullies (Rosgen''s Channel Type: G3) (Rosgen 1996). Soils are saturated sandy loams and clay loams with a high organic matter content in the upper layers.

Geographic Range: This association occurs in the mountains of Colorado, on the high plateaus of southern Utah and lower elevations on the Colorado Plateau in central and eastern Utah.

Nations: US

States/Provinces:  CO, NM?, UT




Confidence Level: High

Confidence Level Comments: No Data Available

Grank: G2G3

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Salix eriocephala var. ligulifolia (Kittel et al. 1999b)
= Salix eriocephala var. ligulifolia / Mesic Graminoid Plant Association (Kittel et al. 1996)
= Salix ligulifolia (=S. eriocephala var. ligulifolia) Shrubland (Carsey et al. 2003a)
= Salix ligulifolia - Salix monticola Plant Association (Richard et al. 1996)
= Strapleaf willow (Salix eriocephala var. ligulifolia) Plant Association (Kittel et al. 1999a)
= Yellow willow (Salix eriocephala var. ligulifolia) Plant Association (Kittel et al. 1996)

Concept Author(s): L. Tasker

Author of Description: L. Tasker, G. Kittel and K.A. Schulz

Acknowledgements: No Data Available

Version Date: 02-24-09

  • Baker, W. L. 1989b. Classification of the riparian vegetation of the montane and subalpine zones in western Colorado. Great Basin Naturalist 49(2):214-228.
  • Bourgeron, P. S., and L. D. Engelking, editors. 1994. A preliminary vegetation classification of the western United States. Unpublished report. The Nature Conservancy, Western Heritage Task Force, Boulder, CO. 175 pp. plus appendix.
  • CNHP [Colorado Natural Heritage Program]. 2006-2017. Tracked natural plant communities. Colorado Natural Heritage Program, Colorado State University, Fort Collins. [https://cnhp.colostate.edu/ourdata/trackinglist/plant_communities/]
  • Carsey, K., G. Kittel, K. Decker, D. J. Cooper, and D. Culver. 2003a. Field guide to the wetland and riparian plant associations of Colorado. Colorado Natural Heritage Program, Fort Collins, CO.
  • Coles, J., A. Tendick, G. Manis, A. Wight, G. Wakefield, J. Von Loh, and A. Evenden. 2009a. Vegetation classification and mapping project report, Arches National Park. Natural Resource Technical Report NPS/NCPN/NRTR--2009/253. National Park Service, Fort Collins, CO. 544 pp.
  • Dorn, R. D. 1995. A taxonomic study of Salix section Cordatae subsection Luteae (Salicaceae). Brittonia 47(2):160-174.
  • Dorn, R. D. 1997. Rocky Mountain region willow identification field guide. Renewable Resources R2-RR-97-01. USDA Forest Service, Rocky Mountain Region, Denver, CO. 107 pp.
  • Hansen, P. L., R. D. Pfister, K. Boggs, B. J. Cook, J. Joy, and D. K. Hinckley. 1995. Classification and management of Montana''s riparian and wetland sites. Miscellaneous Publication No. 54. Montana Forest and Conservation Experiment Station, School of Forestry, University of Montana. 646 pp. plus posters.
  • Kartesz, J. T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: J. T. Kartesz and C. A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, NC.
  • Kittel, G. M., and N. D. Lederer. 1993. A preliminary classification of the riparian vegetation of the Yampa and San Miguel/Dolores river basins. Unpublished report prepared for Colorado Department of Health and the Environmental Protection Agency by The Nature Conservancy, Colorado Field Office, Boulder.
  • Kittel, G., E. Van Wie, M. Damm, R. Rondeau, S. Kettler, A. McMullen, and J. Sanderson. 1999b. A classification of riparian and wetland plant associations of Colorado: A user''s guide to the classification project. Colorado Natural Heritage Program, Colorado State University, Fort Collins CO. 70 pp. plus appendices.
  • Kittel, G., E. Van Wie, M. Damm, R. Rondeau, S. Kettler, and J. Sanderson. 1999a. A classification of the riparian plant associations of the Rio Grande and Closed Basin watersheds, Colorado. Unpublished report prepared by the Colorado Natural Heritage Program, Colorado State University, Fort Collins.
  • Kittel, G., R. Rondeau, and A. McMullen. 1996. A classification of the riparian vegetation of the Lower South Platte and parts of the Upper Arkansas River basins, Colorado. Submitted to Colorado Department of Natural Resources and the Environmental Protection Agency, Region VIII. Prepared by Colorado Natural Heritage Program, Fort Collins. 243 pp.
  • Manning, M. E., and W. G. Padgett. 1995. Riparian community type classification for Humboldt and Toiyabe national forests, Nevada and eastern California. USDA Forest Service, Intermountain Region. 306 pp.
  • Owns, T., project coordinator, et al. 2004. U.S. Geological Survey and National Park Service Vegetation Mapping Program: Florissant Fossil Beds National Monument. U.S. Geological Survey and National Park Service. 390 pp.
  • Padgett, W. G., A. P. Youngblood, and A. H. Winward. 1989. Riparian community type classification of Utah and southeastern Idaho. Research Paper R4-ECOL-89-0. USDA Forest Service, Intermountain Forest and Range Experiment Station, Ogden, UT.
  • Richard, C., G. Kittel, and S. Kettler. 1996. A classification of the riparian vegetation of the San Juan National Forest. Draft 1 report. Colorado Natural Heritage Program, Colorado State University, Fort Collins.
  • Rosgen, D. 1996. Applied river morphology. Wildland Hydrology, Pagosa Springs, CO.
  • Welsh, S. L., N. D. Atwood, S. Goodrich, and L. C. Higgins, editors. 1987. A Utah flora. Great Basin Naturalist Memoirs 9. Provo, UT. 894 pp.
  • Welsh, S. L., N. D. Atwood, S. Goodrich, and L. C. Higgins, editors. 2003. A Utah flora. Third edition revised. Brigham Young University Press, Provo, UT. 912 pp.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.
  • Youngblood, A. P., W. G. Padgett, and A. H. Winward. 1985a. Riparian community type classification of eastern Idaho-western Wyoming. R4-Ecol-85-01. USDA Forest Service, Intermountain Region, Ogden, UT. 78 pp.