found: Wikipedia, Apr. 28, 2014(Salix nigra (black willow) is a species of willow native to eastern North America, from New Brunswick and southern Ontario west to Minnesota, and south to northern Florida and Texas)
found: ITIS, Apr. 28, 2014(Salix nigra Marshall - accepted - black willow. Synonyms: Salix ambigua; Salix denudata; Salix dubia; Salix falcata; Salix flavovirens; Salix ligustrina; Salix ludoviciana; Salix purshiana; Salix nigra var. altissima; Salix nigra var. brevifolia; Salix nigra var. brevijulis; Salix nigra var. falcata; Salix nigra var. lindheimeri; Salix nigra var. longifolia; Salix nigra var. marginata)
found: GRIN taxonomy for plants, via WWW, Apr. 28, 2014(Salix nigra Marshall. Common name: black willow)
found: Plants database, Apr. 28, 2014(Salix nigra Marshall - Black willow. Synonyms: Salix ambigua Pursh, non Ehrh.; Salix nigra Marshall var. longifolia Andersson; Salix nigra Marshall var. brevifolia Andersson; Salix denudata Raf.; Salix falcata Pursh; Salix nigra Marshall var. altissima Sarg.; Salix nigra Marshall var. brevijulis Andersson; Salix ligustrina Michx. f.; Salix nigra Marshall var. falcata (Pursh) Torr.; Salix flavovirens Hornem.; Salix purshiana Spreng.; Salix nigra Marshall var. lindheimeri C.K. Schneid.; Salix dubia Trautv.; Salix nigra Marshall var. marginata (Wimm. ex Andersson) Andersson; Salix ludoviciana Raf)
