1883.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 37 



Populus Berggreni ? Heer. 



Two specimens ; Museum number, 2G41. 

 Froteoides acuta Heer. 



One specimen ; Museum number, 2642. 

 Leguminosites phaseolites ? Heer. 



Two specimens ; Museum number, 2643. 



18. 



Plants collected by Captain (since General) J. C. Fremont during the 

 geographical survey of Oregon and north California in 1843-4:4. De- 

 scribed by James Hall in Fremont's "Exploring Expedition to the Rocky 

 Mountains." (Doc. No. 166, Washington, 1845, pp. 301-307, Pis. i-m.) 



[The numbers given the specimens are the preliminary ones used by 

 Professor Lesquereux during his examination. The regular Museum 

 numbers are included in brackets.] 



1,1a. [2645.] G lossopterls phillipsiit Hall. Plate n, figs. 5, 5o, 56, 5c. 



This is remarkably similar in form of leaves and nervation to Glos- 

 sochlamys transmutans Card. & Ett. (Brit. Eoc. Fl., PI. in, fig. 3; xn, 

 fig. 8). The specimens of Fremont show indistinctly nervilles between 

 the lateral nerves composing irregular, square meshes. In fig. 8, PI. 

 xn, of Gard & Ett., the leaf has the areolation obsolete and the lateral 

 nerves split, not branching near the end as in the figure of Hall. 



No. 2. [2646.] 



Represents two leaves of the same size and character with the second- 

 aries slightly defined or scarcely so, and the areolation a little more 

 distinct in one of them. 



No. 3. [2647] 



Has three fragments of leaves a, b, e; a is like a dicotyledonous 

 plant in appearance, but the areolation is formed of brauches at right 

 angles to the secondaries, which look like nervilles, but are really divis- 

 ions of the nerves as they are enlarged at their point of attachment. 

 The same character is seen in b, and in this as iu c, the ultimate areoles 

 are pitted as in Hall's fig. 5c of PI. n, the same areolation is seen in the 

 leaves of Dictyophyllum nilsoni (Nath. Waxte from Falszo, PL v, fig. 2). 



No. 4, 4a. .[2648.] 



A large specimen with oue large leaf, size and form of Glossochlamys 

 transmutans, I. c, with the areolation of a Chrysodium. The left side of 

 the lamina is traversed by a single, curved secondary (?) nerve, which, 

 however, does not appear as a nerve, as the meshes of the epidermis 

 covers it interruptedly aud independently of it. The other leaf, a frag- 

 ment only, looks, at first sight, like a Ficus by its nervation. But here 

 also the relation of the areoles to the secondaries and tertiaries is not 

 like a subdivision by degrees of larger areas into smaller ones, but a 

 chain or linking of brauches constituting still a netting of irregularly 

 round oblong areoles of the same type as iu Podoloma polypodioidcs (Ett. 

 & Gard, I, c, PI. ill. fig. 0). 



