II 



296 CONIFERALES INCERTAE SEDIS 



with those of Cryptomeria and VoUzia but mentions the presence 

 of a single seed as an important distinguishing feature. To 

 unite Swedenborgia with VoUzia would be misleading, and there 

 is no valid reason for replacing Nathorst's term by Potonie's 

 genus Voltziopsis. 



Strobilites. Strobilites laxus Seward. 



This name was applied to a lax strobilus, 30 cm. long and 1-3 cm. 

 broad at the base, from Rhaetic beds on the Orange River, South 

 Africa 1 , which may be allied to VoUzia, though in the absence of 

 seeds its position cannot be determined. The sporophylls consist 

 of a lamina with a rounded distal edge and a radially folded surface 

 attached by a short horizontal stalk resembling the seed-bearing 

 scales of VoUzia heterophylla, V. coburgensis, and to some extent 

 Heer's Jurassic Leptostrobus. 





ULLMANNIA. Goeppert. 



Goeppert 2 in his description of Ullmannia refers to the extensive 

 literature on the fossils from the Permian copper mines of Frank- 

 enberg on which the genus was founded: the most complete of 

 these earlier accounts is that of Ullmann. In habit similar to 

 Walchia, Ullmannia is represented by various forms of foliage- 

 shoots and impressions of buds and cones, but the data are in- 

 sufficient to settle its position in the Coniferales. Ullmannia 

 Bronni (fig. 750, D), the type-species, is practically identical in 

 leaf-form and habit with the Mesozoic genus Pagiophyllum, while 

 the species U. frumentaria (fig. 750, A) agrees closely with such 

 recent Conifers as Araucaria excelsa and A. Bidwilli. The branches 

 bear spirally disposed crowded leaves with a median vein and 

 numerous longitudinal striations on the lamina. The association 

 of impressions of foliage-shoots with wood having the Araucarian 

 type of pitting 3 affords contributory evidence, though by no 

 means proof , of Araucarian affinity. In the absence of any definite 

 information as to the structure of the reproductive shoots Ull- 

 m,annia must be left for the present as a Conifer which cannot be 

 assigned with certainty to a systematic position. Tuzson 4 uses 



1 Seward (08) B. p. 101, text-fig. 7; PL v. fig. 3. 2 Goeppert (50) p. 185. 



3 Solms-Laubach (84) PL in. fig. 16; Schimper and Schenk (90) A. p. 275, figs. 

 190, 191. 4 Tuzson (09) p. 23. 



