This appendix contains three sections. Section 2 is a list of plants that commonly occur in wetlands of a given region. Users will be furnished all appropriate regional lists. Section 3, which is presented herein, describes morphological, physiological, and reproductive adaptations that can be observed or are known to occur in plant species that are typically adapted for life in anaerobic soil conditions. Section 3 Morphological, Physiological, and Reproductive Adaptations of Plant Species for Occurrence in Areas Having Anaerobic Soil Conditions Morphological adaptations 3.
Many plant species have morphological adaptations for occurrence in wetlands.
These structural modifications most often provide the plant with increased buoyancy or support. This adaptation is a strong indicator of hydrophytic vegetation in nontropical forested areas. These modified roots may serve as respiratory organs in species subjected to frequent inundation or soil saturation. These usually develop during periods of sufficiently prolonged soil saturation to destroy most of the root system. For example, aerial roots on woody vines are not normally produced as a response to inundation or soil saturation.