134 JklESOZOK' FLORAS OF UNITED STATES. 



PI. XXXM, Fig. 3, shows a small twig on which some of the leaves 

 are preserved entire. This is shown enlarged in Fig. 4. Fig. 5 shows one 

 of the stoutest twigs foimd. Fig. 6 represents a branch of the largest size 

 found, and it contains an attached cone. Fig. 7 gives an enlargement of 

 the principal branch, and Fig. 8 one of the cones and twigs attached. 



The plant is most abundant at locality No. 19, and is not rare at 

 locality No. 18. It occurs also at localities Nos. 1 and 13. 



Genus SAMAROPSTS Gopport. 



SaMAKOPSLS '( OREGONENSIS Foiitaiiio n. sp. 



PI. XXXVI, Figs. 9-12. 



Two small Ijony seeds were obtained from locality No. 7 that seem to 

 be of the same nature as the small seeds described by Heer from the 

 Jurassic of Siberia, and regarded l)y him as belonging to the fossil genus 

 Samaropsis." Although the>- are apparently nearer to these forms than 

 to any other previously described plants, they do not seem to be identical 

 wiih any of the species of Samaropsis described by Heer, and their true 

 position is doubtful. The two Oregon fossils differ somewhat in form, but 

 evidently are the seeds of the same genus if not the same species of plant. 

 They seem to have been winged seeds. The wings show only traces in a 

 marginal ring, the fossil being mainly the seed or nucleus to which the 

 wing was attached. Owing to the difference in their form 1 shall dis- 

 tinguish them as form a and form b. 



Both of these seeds have a smooth bony surface. They are sur- 

 rounded by a depressed line representing the attachment of the wing to the 

 seed. Outside of this there is a narrow border, less than 1 nma. wide, 

 which is all of the wing that remains, if it ever existed. 



Form a, represented in PL XXXVI, Fig. 9, enlarged in Fig. 10, is the 

 larger of the two. It is ol)long in form, abruptly rounded off at one end, 

 which seems to be the base. The same width is maintained to near the 

 opposite end, where it terminates in a lancet-shaped tip. This seed is 5 

 mm. long and a little over 2 mm. wide. Form b, given in Fig. 11, enlarged 

 in Fig. 12, is cylindrical in shape, slightly narrowed at the ends, and 



a Fl. Foss. Arct., Vol. IV, Pt. II, pp. 80-82. 



