138 The Lower Cretaceous Floras op the World 



Cycadeoidea heliochorea Ward 



Cycadeoidea ingens Ward 



Cycadeoidea insolita Ward 



Cycadeoidea Jenneyana Ward 



Cycadeoidea Marshiana Ward 



Cycadeoidea McBridel Ward 



Cycadeoidea minima Ward 



Cycadeoidea minnekahtensis Ward 



Cycadeoidea nana Ward 



Cycadeoidea occidentalis Ward , 



Cycadeoidea Paynei Ward 



Cycadeoidea protea Ward 



Cycadeoidea pulcherrima Ward 



Cycadeoidea reticulata Ward 



Cycadeoidea rhomMca Ward 



Cycadeoidea Stillwelli Ward 



Cycadeoidea superba Ward 



Cycadeoidea turrita Ward 



Cycadeoidea wellsii Ward 



Cycadeoidea Wielandi Ward ^ 



CzekanowsTcia nervosa Heer (?) 



Equisetum Burchardti (Dunker) Brongniart 



Gleichenia Zippei (Corda) Heer 



Glossozamites Fontaineanus Ward 



Nageiopsis longifolia Fontaine (?) 



Nageiopsis angustifolia Fontaine (?) 



Nilsonia nigracollensis Wieland 



Onychiopsis brevifoUa (Fontaine) Berry 



Onychiopsis Gcepperti (Schenk) Berry 



Onychiopsis latilota (Fontaine) Berry 



Onychiopsis nervosa (Fontaine) Berry 



Onychiopsis psilotoides (Stokes and Webb) Ward 



Pinus susgiicensis Dawson 



Scleropteris distantifolia Fontaine 



Scleropteris rotundifolia Fontaine 



Sequoia sp., Fontaine (cone) 



Sphenopteris plurinervia Heer ? 



Williamsonia (?) phwnicopsoides Ward 



Zamites borealis Heer 



Zamites brevipennis Hear 



Cycads predominate in tiiis flora with a total of 33 species, but this is 

 probably more apparent than real, and is due to more or less duplication 

 in species founded on the gross characters of silicified trunks. The ferns 



^Wieland, in Ward, Mon. U. S. Geol. Surv., vol. xlviii, 1906, pp. 317-325, pi. 

 Ixxiii, figs. 15a-d; American Fossil Cycads, Carnegie Institution of Washing- 

 ton, Publ. No. 34, 1906. 



