Author:Sandra Knapp Treatments NNicotiana Nicotiana acuminata Nicotiana attenuata Nicotiana clevelandii Nicotiana glauca N cont.Nicotiana longiflora Nicotiana obtusifolia Nicotiana plumbaginifolia Nicotiana quadrivalvis Nicotiana repanda N cont.Nicotiana rustica Nicotiana sylvestris Nicotiana tabacum