 | 1919 - 830 páginas
...Taeniopterix, Nilsonia, and Sapindopsis from the Potomac group. US Nat. Mus. Proc., vol. 38, 1910, pp. 625-644. A revision of several genera of gymnospermous plants from the Potomac group in Maryland and Virginia. US Nat. Mue. Proc., vol. 40, 1911, pp. 289-318. An Engelhardtia from the American Eocene. Am. Jour.... | |
 | Frank Hall Knowlton - 1919 - 834 páginas
...Nil-sonia-, and Sapindopsis from the Potomac group. U. 8. Nat. Mus. Proc., vol. 38, 1910, pp. 625-644. A revision of several genera of gymnospermous plants from the Potomac group in Maryland and Virginia. Г. S. Nat. Mus. Proc., vol" 40, 1911, pp. 289-318. An EnffdJtarJtm from the American Eocene. Am. Jour.... | |
 | Frank Hall Knowlton - 1919 - 836 páginas
...Taeniopteris, Nilsonia, and Sapindopsis from the Potomac group. US Nat. Mus. Proc., vol. 38, 1910, pp. 625-644. A revision of several genera of gymnospermous plants from the Potomac group in Maryland and Virginia. US Nat. Mus. Proc., vol. 40, 1911, pp. 289-318. An Engelhardtia from the American Eocene. Am. Jour.... | |
 | Geological Survey (U.S.) - 1922 - 1196 páginas
...Tertiary floras of the Atlnntlc and Gulf Coastal Plain. Am ГЬ Soc, Pr 50 : 301-315, 11 (1911) 1 If Л revision of several genera of gymnospermous plants from the Potomac group In Maryland and Virginia, ü S Nat Mas, Pr 40:289-318 (1911) HIT A revision of the fossil ferns from the Potomac group which... | |
 | John Merle Coulter, M.S. Coulter, Charles Reid Barnes, Joseph Charles Arthur - 1915 - 596 páginas
...1910. 3- , Epidermal character of Frenelopsis ratnosissima. BOT. GAZ. 50:305-309. figs. 2. 1910. 4' , Revision of several genera of gymnospermous plants from the Potomac group in Maryland and Virginia. Contrib. US Nat. Museum 40:289-318. 1911. 5. , Maryland Geol. Survey, Lower Cretaceous. Baltimore.... | |
 | Torrey Botanical Club - 1912 - 740 páginas
...of the genus Nageiopsis of Fontaine. Proc. US Nat. Mus. 38: 185-195. /. i, 2. 6 Je 1910. Berry, EW A revision of several genera of gymnospermous plants...the Potomac group in Maryland and Virginia. Proc. US Nat. Mus. 40: 289-318. 8 My 1911. Bessey, CE The phyla, classes, and orders of plants. Trans. Am. Micros.... | |
 | Albaert Charles Seward - 566 páginas
...Bot. voL xxv. p. 193. (112) The Flora of the RariUn Formation. Geol. Sun: Nnc Jersey. Bull. 3. (112) A Revision of several genera of Gymnospermous plants...the Potomac group in Maryland and Virginia. Proc. US Naf, Mus. vol. XL. p. 289. (12) The age of the plant-bearing shales of the Richmond coalfield. Amer.... | |
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A revision of the fossil ferns from the Potomac group which have been referred to the genera Cladophlebis and Thyrsopteris. 
