Abstract
Seedlings from the Cerro Cuadrado (Jurassic) Petrified Forest in Argentina have been shown to be comparable to extant araucarian seedlings from the sections Eutacta, Bunya and Colombea. Anatomically they are compared to the cone axes and embryos in the fossil cones of Araucaria mirabilis and Pararaucaria patagonica. Two seedlings previously described by Wieland are shown on pith structure to belong to P. patagonica. The remaining turbinate to top-shaped structures are compared with first year extant Bunya and Columbia seedlings and the cone A. mirabilis. Corm-like structures may represent an older seedling stage. From earlier work on the embryonic anatomy and germination stages described here, P. patagonica is deduced to have been epigeal and A. mirabilis hypogeal.
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