Multiple routes underground? Frost alone cannot explain the evolution of underground trees

Affiliations

• ¹ Department of Biology, McGill University, 1205 ave Docteur Penfield, Montreal, H3A 0G4, Quebec, Canada.
• ² African Centre for DNA Barcoding, Department of Botany & Plant Biotechnology, University of Johannesburg, PO Box 524, Auckland Park, 2006, Johannesburg, Gauteng, South Africa.
• ³ Department of Plant Sciences, University of Pretoria, Private Bag X20, Hatfield 0028, Pretoria, South Africa.
• ⁴ Department of Biological Sciences, University of Cape Town, Rondebosch, 7701, Western Cape, South Africa.
• ⁵ South African Environmental Observation Network, University of Cape Town, Rondebosch, 7701, Western Cape, South Africa.