Mats of bur-reed leaves
USDA Ecological Section Map
- Primary Life FormHerb
- Elevation0-3700 m
- State RarityS3?
- Global RarityG4
- DistributionCAN: BC?. USA: CA, CO, ID, OR, WA, WY (NatureServe)
- Endemic to CaliforniaNo
- Endemic to California Floristic Province and DesertsNo
- Date Added1995/11/01
- Sparganium angustifolium > 50% relative cover on the water surface (Keeler-Wolf et al. 2003b).
Other Habitat, Alliance and Community Groupings
|MCV (1995)||Bur-reed series|
|NVCS (2009)||Sparganium angustifolium permanently flooded herbaceous alliance|
|Holland||Montane freshwater marsh|
|WHR||Fresh emergent wetland|
|CDFW CA Code||52.010.00|
National Vegetation Classification Hierarchy
|Formation Class||Hydromorphic Vegetation (Aquatic Vegetation)|
|Formation Subclass||Freshwater Aquatic Vegetation|
|Formation||Freshwater Aquatic Vegetation|
|Division||North American Freshwater Aquatic Vegetation|
|Macro Group||Western North American Freshwater Aquatic Vegetation|
|Group||Temperate Pacific freshwater aquatic bed|
Sparganium angustifolium is a relatively invariable species that forms fertile hybrids with S. emersum. Flat to convex leaves and contiguous staminate heads distinguish S. angustifolium. Leaves that are triangular, at least at the base, and numerous staminate heads, at least some of which are not contiguous, distinguish S. emersum. S. eurycarpum grows along the coast and inland in California, but not in salt marshes. S. natans grows in cool, quiet, slightly acidic to somewhat basic waters of bays, pools, ditches, and fens (Kaul 2000). The vegetational relationships among the bur-reeds need clarification.
Sparganium angustifolium is common in California’s mountain lakes, regularly forming stands in the middle of small ponds and near lake shorelines. The habitat setting is similar to that of Nuphar lutea, but S. angustifolium typically occupies shallower water that may fluctuate more widely during the growing season.
Life History Traits of the Principal Species
|Life forms||Polycarpic perennial; herb|
|Mode of dispersal||Animal; water/hydrological|
|Mode of sprouting||Underground structures (rhizomes)|
|Survivability after fire/disturbance||Fire-hardy; no/low sprouter to high sprouter|
|Reproductive range||Life of plant|
|Fire return interval||—|
The range of Sparganium species includes the Central California Coast (261A), Central California Coast Ranges (M262A), Modoc Plateau (M261G), Northern California Coast Ranges (M261B), Sierra Nevada Foothills (M261F), Southern California Coast (261B), and Southern California Mountains and Valleys (M262B).
- Great Valley (262Al). Stands of Sparganium eurycarpum occur in the Sacramento-San Joaquin River delta (Hickson and Keeler-Wolf 2007).
- Klamath Mountains (M261Ad, Ag, Aj, Ap, At). Mats of S. angustifolium occupy lakes and ponds at montane elevations.
- Northern California Coast (263Ak). Stands of S. eurycarpum occur at Point Reyes National Seashore and other locations in the section.
- Sierra Nevada (M261Ee, Eh, Ej-m, Eo, Eq, Et-u). Mats of S. angustifolium occur in lakes and ponds at montane elevations in Yosemite National Park and environs (Keeler-Wolf et al. 2003b). Stands of S. eurycarpum also exist in this section.
- Southern Cascades (M261Df, Dm). Mats of S. angustifolium exist in lakes and ponds at montane elevations.
- Sparganium angustifolium 
-  Keeler-Wolf, T.;Schindel, M.;San, S.;Moore, P.;Hickson, D. 2003b
- Anderson, M.K. 2003b
- Barry, W.J. 1989a
- Barry, W.J. 1989b
- Cheatham, N.H.;Haller, J.R. 1975
- Mason, H.L. 1957