OLDEK POTOMAC OF \1K(.L\JA AND MAKYLAXD. 4^5 



El'IIF.DRITES ? VF.RXONENSIS FulltailU' 11. Sj). 



PI. evil. v\ix. s. 



The Mount Veriioii locality yielded a pair of small nut-like seeds that 

 seem to liavo been closely approximate in jirowth. On the imier side, 

 whei-e they toucluMl each other, they have nearly straight margins. On 

 the outer side the margins ai-e curved. At their l)ases they are i-oimded 

 and obtuse. At their sununits they are acute. They seem to have 

 t)een covered bv a small leaf or scale. They do not stand out convex 

 on the matrix, and hence were probably lliin in texture. They resemble 

 the paired seeds from the Jurassic of Siberia, described \)\ Heer as Eplu- 

 (Irik's antiquiis." . Of course the amount of material is not sufficient to fix 

 the position of these seeds, but they may ]irovisionally be placetl in the 

 genus Ephedrites." 



The specimen was collected on November G, 1892. 



Glyptostrobus (Taxodium) liiiooKEXsis (Fontaine) Ward. 



Pi. CX, Fi^r. 1. 



1SS9. Taxodium {Glypimtrohm) brookense. Font.: Potomac Flora (MonoRr. IT. S. 



Geol. Surv., Vol. XV), p. 254, pi. cxxii, figs. 1, la, lb; pi. cxxiv, figs. 13, An, 



4, 4a, 5-7, 7a, S, (); pi. cxxxi, figs. 5,5a; pi. clxv, figs. 1-3; pi. clxvi, figs. 4, 



4a, 7; ])i. cixvii, fig. 3. 

 1895. Cltjptostrohus hrookensis (Font.) Ward: Fifteentii Ann. Pop. V. S. Geo!. Surv., 



1S9.3-94, p. 359. 



There are 9 specimens of this conifer in the Mount Vei'iion flora. 

 Some of them are very fine. The specimen given in PI. (-X, l-'ig. 1, is 

 one of th(^ best of these. The leaves on the ultimate branches are beauti- 

 fully- preserved. This is due to the fineness of texture of the matrix of 

 the Mount Vernon clay. One of the finel>- pi-eserved specimens has 

 associated with it a cone that seems to be an immature female one, 

 belonging to this plant. It is, however, not certainly attached to a twig. 

 The cone is oblong in shape, about 7 mm. long, with faint 1>- shown scales 

 that seem to be chaffy. 



The specimens wei'c all found at the Mount Vernon locality, most 

 of them, including the one figured, on November 0, 1S92, but some on 

 October 16, 1892, and two on May 14, 1893. • 



«F1. Fcss. .\i-ct., Vol. IV (Beitr. z. -Iiini-Fl. Ostsibiriciis), p. 82. pi. .\iv, li<;. 7. 



