396 ABIETESTEAE [CH. 



This author examined the American specimen, which she regards 

 as a fertile shoot of a three-needled Pine : the strobilus is 35 mm. 

 long and from it mnged pollen-grains were isolated. In its unusual 

 length the strobilus resembles the male flowers of Pinus australis 

 from Florida. 



PITYOSPERMUM. Nathorst. 



The few specimens chosen for description afford examples of 

 some of the oldest records of fossils, agreeing in the form of the wing 

 with recent Abietineous seeds and, as far as I know, none have been 

 discovered in strata below the Rhaetic. From Tertiary rocks 

 numerous winged seeds are recorded, but these are of no special 

 interest and they are usually accompanied with foliage-shoots, 

 cones, or other fossils which afford more trustworthy data as to 

 relationship. 



Pityospermum Lundgreni Nathorst. 



Nathorst described several winged seeds from the Rhaetic beds 

 of Scania as Pinus Lundgreni^; they are 9 — 11 mm. long and 4 mm. 

 broad, the actual seeds being 3 — 4 mm. in 

 length . Two examples from Stabbarp in the 

 Stockholm Museum are represented in fig. 

 788. To the same species Nathorst referred 

 some imperfect cylindrical cones bearing — ' 



thin imbricate scales and reaching a length Fig. 788. Pityospermum 

 of 3 — 5 cm. and a diameter of 1-2 — 2 cm.; Lundgreni. From Stab- 

 ly i i J ii, 'vi'j- ii, J- barp in Scania; Rhaetic. 



he also suggested the possibility that some /c* vu i m 

 short shoots and long needle-like leaves de- nat. size.) 

 scribed as Schizolepis Follini Nath. may 



belong to the plant which bore the cones and seeds. In a later 

 account of Schizolepis^ he expressed the opinion that in the 

 absence of any proof of actual connexion the leaves and short 

 shoots should be separated from Schizolepis and included in 

 Pinites. These leaf-fascicles are described under the name Pityo- 

 phyllum and the seeds, which occur as separate fossils, are alone 

 included in Pityospertnum Lundgreni. The striking resemblance 

 of the seeds to those from Franz Josef Land (fig. 789) and recent 



1 Nathorst (78) B, p. 31, PI. xiv. figs. 9 a, 1.3—17; PI. xv. figs. 1—2. 



2 Ibid. (97) p. 38. 



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