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| Plate 33.--Classification: SYSTEM Riverine, SUBSYSTEM Lower Perennial, CLASS Emergent Wetland, SUBCLASS Nonpersistent, DOMINANCE TYPE Peltandra virginica-Pontederia cordata, WATER REGIME Semipermanently Flooded, WATER CHEMISTRY Fresh-Circumneutral, SOIL Mineral. This wetland lies in a bay of the Chicopee River. (Hampden County, Massachusetts; July 1970; Photo by R. C. Smardon) |
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| Plate 34.--Two habitats are shown here. Classification of channel: SYSTEM Riverine, SUBSYSTEM Upper Perennial, CLASS Rock Bottom, SUBCLASS Bedrock, WATER REGIME Permanently Flooded, WATER CHEMISTRY Fresh. Classification of shore: SYSTEM Riverine, SUBSYSTEM Upper Perennial, CLASS Rocky Shore, SUBCLASS Bedrock, WATER REGIME Seasonally Flooded, WATER CHEMISTRY Fresh. (Penobscot County, Maine; October 1977; Photo by R. W. Tiner) |
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| Plate 35.--Classification: SYSTEM Riverine, SUBSYSTEM Upper Perennial, CLASS Rock Bottom, SUBCLASS Rubble, WATER REGIME Permanently Flooded, WATER CHEMISTRY Fresh. Many of the boulders in this river exceed 1 m (3.3 ft) in diameter. (Matanuska-Susitna Borough, Alaska; June 1985; Photo by F. C. Golet) |
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| Plate 36.--Classification: SYSTEM Riverine, SUBSYSTEM Upper Perennial, CLASS Unconsolidated Bottom, SUBCLASS Cobble-Gravel, WATER REGIME Permanently Flooded, WATER CHEMISTRY Fresh-Circumneutral. (Washington County, Rhode Island; July 1977; Photo by F. C. Golet) |