Juncus effusus
Riparian zone flora is allowed establish in the only non-concrete bottom section of the channelized Los Angeles River. Native plants include: Arroyo Willows ("Salix lasiolepsis"), Cattails ("Typha dominguinsis"), Swamp sedge ("Carex senta"), Soft rush ("Juncus effusus"), Toad rush ("Juncus bufonius"), California endemic Wrinkled rush ("Juncus rugulosus"), and Watercress ("Rorippa nasturtium-aquaticum").