384 Systematic Paleontology 



IsTageiopsis longifolia Fontaine ' 

 Plate LXI 



Nageiopsis longifoUa Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 1889, 



p. 195, pi. Ixxv, fig. 1; pi. Ixxvi, figs. 2-6; pi. Ixxvii, figs. 1, 2; pi. 



Ixxviii, figs. 1-5; pi. Ixxix, fig. 7; pi. Ixxxv, figs. 1, 2, 8, 9. 

 Nageiopsis crassicaulis Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 



1889, p. 198, pi. Ixxix, figs. 2, 6; pi. Ixxxii, fig. 1;' pi. Ixxxiv, figs. 3, 



9, 11. 

 Nageiopsis longifoUa ? Font., 1894, in Diller and Stanton, Bull. Geol. Soc, 



Am., vol. V, p. 450. 

 Angiopteridium strictinerve Fontaine, 1894, in Diller and Stanton, loc. cit. 

 Nageiopsis longifoUa ? Font., 1896, in Stanton, Bull. U. S. Geol. Surv., No. 



133, p. 15. 

 Angiopteridium strictinerve Fontaine, 1896, in Stanton, loc. cit. 

 Nageiopsis longifoUa Fontaine, 190G, in Ward, Mon. U. S. Geol. Surv., vol. 



xlviii, 1905, pp. 259, 311, 484, 491, 510, 528, 548, 557; pi. Ixviii, figs. 9- 



12; pi. Ixxiii, fig. 9 (non pi. xlv, figs. 1-5). 

 Nageiopsis longifoUa ? Knowlton, 1908, in Diller, Bull. Geol. Soc, Am., vol. 



xix, p. 386. 

 Nageiopsis longifoUa Berry, 1910, Proc. U. S. Natl. Mus., vol. xxxviii, p. 189. 



Description. — Branching leafy twigs of large size, stout and thick, 

 apparently branched in approximately one plane. Leaves linear-lanceo- 

 late, often slightly curved, somewhat inequilaterally narrowed into a 

 short slightly twisted petiole; above, gradually narrowed to the acute 

 or subacute tip. Length 8 to 20 cm. ; width 5 mm. to 1.3 cm. The leaves 

 are not crowded and usually appear opposite or sub-opposite as if inserted 

 on the lateral margins of the stem although at times they seem to be 

 attached to its upper or lower side. As previously remarked none of 

 the material is conclusive in regard to the phyllotaxy. Veins 9 to 12 in 

 number, usually 10, forking only at the base and running parallel until 

 they abut against the leaf margin, about .7 nun. apart, somewhat 

 coarser in calibre than in the other members of the genus, distinct on 

 both surfaces of the lamina and apparently not immersed. Leaf sub- 

 stance not coriaceous. 



^ Irites alaskana Lesq. is made a synonym of this species in Monograph 

 xlviii. According to the principles so often set forth by Prof. Ward this 

 species should be renamed if Irites alaskana is included in it, since the latter 

 was published 3 years before Nageiopsis longifoUa. As the Alaska remains 

 are not those of a Nageiopsis this name is omitted from the synonymy. 



