

XLV] WALCHIA 277 



Zeiller from the Permian of France which he refers to Pagio- 

 phyllum in preference to Ullmannia, pointing out that the leaves 

 are relatively longer and less appressed to' the axis than in the 

 shoots known as U. Bronni Goepp. (fig. 750, D, E). Triassic 

 specimens from North Italy in the Bologna Museum named 

 Pagiophyllum Rotzoanum appear to be indistinguishable from the 

 English species. 



It is unnecessary to describe other examples of the genus as 

 the Pagiophyllum type is illustrated by many Mesozoic and 

 Tertiary species referred by authors to Sequoia, Geinitzia, Elatides, 

 Sphenolepidium, and other genera. The important point is that 

 in place of generic names connoting definite forms of cone, the 

 designation Pagiophyllum should be adopted for all foliage-shoots 

 of a certain habit which afford no satisfactory evidence as to the 

 nature of the reproductive shoots. 



PALAEOZOIC CONIFERS EXHIBITING CERTAIN FEATURES SUG- 

 GESTIVE OF ARAUCARIAN AFFINITY BUT WHICH CANNOT BE 



DEFINITELY ASSIGNED TO THAT OR TO ANY OTHER FAMILY 

 OF CONIFERALES ON THE EVIDENCE AT PRESENT AVAILABLE. 



WALCHIA. Sternberg. 



The name Walchia 1 is applied to foliage-shoots, occasionally 

 bearing terminal cones, from Permian and to a less extent Upper 

 Carboniferous rocks, which present a striking agreement in habit 

 with branches of Araucaria excelsa and other recent species of the 

 section Eutacta of Araucaria. Information with regard to repro- 

 ductive shoots is very incomplete and we have little more than 

 circumstantial evidence as to the anatomical features of the stem. 

 In many cases the ultimate branches bear terminal cones similar 

 to the megastrobili of Elatides 2 , but it is only in a few specimens 

 that seeds are preserved on the cone-scales : in some species, e.g., 

 W. frondosa Ren. and W . fertilis Ren. the fertile shoots appear to 

 be of a distinct type though the evidence is not wholly satisfactory. 

 It is probable, as several authors have suggested, that the species 

 included in Walchia, were our information fuller, would be referred 

 to more than one generic type. The resemblance of branches of 

 Walchia to the foliage-shoots of Lepidodendron, especially in the 

 1 Sternberg (26) A. p. xxii. 2 See page 272. 



