PLANTS FROM ALASKA. 167 



PoDOZAMiTES GRANDiFOLius Foiitaine ? 



PI. XLIV, Fig. 1. 



1888. Baiera palmata Heer. Lesquereux: Proc. U. S. Nat. Mus., Vol. XI, p. .31, 



pi. xvi, fig. 4 (quoad Cat. U. S. Nat. Mus., No. 24.37, Lesquereux's Nos. 910, 

 911a.) 



1889. Podozamites grandifolius Font.: Potomac Flora (Monogr. U. S. Geol. Surv., 



Vol. XV), p. 180, pi. Ixxxii, figs. 2, 2a; pi. Ixxxiii, fig. 5. 

 In the collection made by Mr. Woolfe there are several specimens 

 showing fragments of what must have been a very large leaflet. Lesque- 

 reux identified most of these with Baiera palmata Heer, a Jurassic plant. 

 He seems to have been induced to make this determination by the fact 

 that one of the leaflets shows a split at one end, extending a little way 

 down toward the base. Only one of the impressions shows this. A 

 careful examination of it indicates that this is an accidental fission and 

 that the forms before mutilation were entire. Lesquereux's figure is 

 therefore erroneous in this particular. The plant is quite problematic 

 and I am not sure of its true character. The leaflets are too imperfect 

 for a correct determination. They appear to be nearer Podozamites 

 than any other fossil. One of the specimens shows a terminal part. 

 This, given in PL XLIV, Fig. 1, must have been a very large leaf. The 

 end shown in it seems to be the free end or termination of the leaflet. 

 At the opposite end it is mutilated and much of the length is lacking. 

 StiU, it shows a length of 9 cm. and a width at the broken end of 3 cm., 

 allowing for the splitting which occurs here. The specimen figured by 

 Lesquereux, although imperfect at both ends, shows a length of 11 cm., 

 with one margin nearly entire. This specimen shows conclusively that 

 the plant is not a Baiera, but indicates strongly that it is a leaflet of 

 the form of Podozamites. This margin is slightly curved and indicates 

 that the leaflet may have been ensiform. The only forms resembling 

 this plant are those of Podozamites grandifolius of the Potomac beds. 

 The size of the leaflets and the form, so far as it is indicated in this 

 specimen, are strongly suggestive of the Potomac fossil. The nerves 

 are not well preserved, but so far as they can be made out they agree 

 well with those of the Potomac plant. They seem to be strong and 

 flat, apparently made up of two nerve strands. On the same piece of 

 rock and partly overlapping this specimen is the impression of a leaf 

 of Nageiopsis longifolia Font., to be mentioned below. 



