found: Work cat.: Fornara, D.A. Ungulate browsing as an ecosystem process, 2005:abstr. (Acacia nigrescens Miller)
found: GRIN-CA taxonomy, via WWW, Apr. 24, 2006(Taxon: Acacia nigrescens Oliv. Genus: Acacia. Common names: knobthorn; knoppiesdoring [Afrikaans])
found: The plants database, via WWW, Apr. 24, 2006(Acacia nigrescens Oliv., knobthorn)
found: The global compendium of weeds, via WWW, Apr. 24, 2006(Acacia nigrescens Oliver. Synonyms/other Latin names: Acacia mellifera sensu Henckel, Acacia pallens Rolfe, Acacia passargei Harms, Acacia schliebenii Harms. Common name(s): knob thorn, knoppiesdoring)
found: The unforgettable acacias : a large genus of trees & shrubs, via WWW, Apr. 24, 2006(knobthorn acacia (A. nigrescens))
found: Grassland species profiles, via WWW, Apr. 24, 2006(Acacia nigrescens Oliver. Synonyms: A. nigrescens Oliv. var. pallens Benth.; A. brosigii Harms)
found: Plants and floral diversity in the Kruger region, via WWW, Apr. 24, 2006(the "Knobby Thorn", Acacia nigrescens)
notfound: Horticopia on-line plant information, Apr. 24, 2006;The Plant Press dict. of common names, via WWW, Apr. 24, 2006;HortiPlex plant database, via WWW, Apr. 24, 2006;NatureServe explorer, via WWW, Apr. 24, 2006;ITIS, Apr. 24, 2006
