Early Middle Ordovician evidence for land plants in Argentina (eastern Gondwana) Rubinstein, C. V. ; Gerrienne, P. ; de la Puente, G. S. ; Astini, R. A. ; Steemans, P. Abstract Commentary p306 Publication: New Phytologist Pub Date: October 2010 DOI: 10.1111/j.1469-8137.2010.03433.x Bibcode: 2010NewPh.188..365R