136 The Lower Cretaceous Floras of the World 



Eeeently Professor Penhallow ^ has studied the collections made by 

 Dr. E. A. Daly along the International Boundary in the Cascade Moun- 

 tains (49th parallel) and near Rossland in the Sheep Creek valley about 

 120 miles to the eastward. His determinations include the following: 



Aspidium fredericksburgense Fontaine 



CladophleMs skagitensis Penhallow 



Cycadites unjiga Dawson 



Fruit of Bxogen (Dorstenia ?) 



Oleichenia Gilbert-thompsoni Fontaine 



Gleichenia sp. 



Glyptostrohus europceus (Brongn.) Heer 



Myrica serrata Penhallow 



Nilsonia brevipinna Penhallow 



Pinus sp. (vague leaves and seed) 



Populics cyclophylla Heer 



Quercus coriacea Newberry 



Quercus flexuosa Newberry (?) 



Salix perplexa Knowlton (?) 



Sassafras cretaceum Newberry 



Without studying the materials it is not possible to discuss this small 



list intelligently although several of the identifications are obviously 



improbable and more than one horizon is evidently represented. The 



Cladophlehis is not new and might represent a distal portion of the frond 



of any of previously described species of the Cladophlehis virginiensis 



type. The Qleiclienia is obviously not referable to that genus and the 



material identified as Glyptostrohus is probably ArtKrotaxopsis ox Wid- 



dringtonites, while considerable doubt attaches to all of the dicotyledons 



enumerated. 



ALASKA 



The supposed Neocomian beds which contain fossil plants in the Cape 

 Lisburne region of Alaska are very probably of Upper Jurassic age, as 

 indicated by Knowlton's studies. They are therefore omitted in the 

 present discussion, since the contained flora at best is small and not 

 especially noteworthy. 



Mexico 



Prom the supposed JSTeocomian of Tlaxiaco Nathorst^ has reported 

 Pseudofrenelopsis Felixi, Sequoia amhigua and Sequoia Beichenhaclii. 



^ Penhallow, Trans. Roy. Soc. Canada, 3d series, vol. i, sec. iv, 1908, pp. 287- 

 349, pis. i-ix. 



^ Nathorst in Felix & Lenk, Beitr. Geol. u. Palaont. Mexico, Theil ii, 1893, pp. 

 51-54. 



