References
Goodspeed, T. H. 1954. The genus Nicotiana: origins, relationships and evolution of its species in the light of their distribution, morphology and cytogenetics. Chronica Botanica Co., Waltham, Mass. 536 pp. Google Scholar
Goodspeed, T. H. 1954. The genus Nicotiana: origins, relationships and evolution of its species in the light of their distribution, morphology and cytogenetics. Chronica Botanica Co., Waltham, Mass. 536 pp. Google Scholar