OLDKK rOTOMAC OF VIKGIMA AND MARYLAND. 563 



mm., the true base iiol heiiig sliowii. Tliorc ai'c iiidicatioii.s on the .sides 

 of teeth of ihc same nature a.s in 1*. tiKinjldudicn. The fragment is some- 

 what puckci'cd longitudinally, which ohscuics tlic nerves. The latter 

 seem to l)o more numerous and more closely placed in the central part of 

 the leaf than they are in P. niari/IaiKlicd, and to l>e sti'ongei' here. This 

 specimen is shown in PI. CX\TI, Fig. 7." 



The true place of this peculiar plant is douhtful. In a lunnhei' of 

 points it resembles some foi-ms of Planlago, and it ina\- ho compared with 

 P. virginica L. I'rom this resemblance the generic name is formed. The 

 inflorescence also seems to indicate an afhnity with Plantago. Several 

 specimens show this inflorescence. The most complete form is given in 

 PI. CXVni, Fig. 1, which shows an oblong elliptical imprint of a spike- 

 like form, borne on a peduncle which is only partially preserved. This is 

 associated w'ith leaves of the plant now in question. In Fig. 2, similar 

 forms, mounted on long, slender, naked scapes, may be seen attached to 

 the rootstock from which the lea^^es arise. Those seen in Fig. 2 are incom- 

 plete, the tops l)eing broken off. The one given in Fig. 1 is nearly entire 

 and is oblong elliptical in form, with a length of 22 mm. and a width of 12- 

 mm. It seems to have been a chaffy spike, but it is not well enough 

 preserved for the details to be made out. The peduncles, as shown in Fig. 

 2, are at least 4 cm. long and not more than \}, mm. wide. In shape this 

 spike agrees pretty well with an undeveloped spike of Plantago virginica 

 L. Fig. 2 gives the most complete specimen of the plant, as it shows the 

 rootstock with leaves and scapes rising from it. 



Prote-ephyllum dentatum Fontaine. 



PI. CXVIII, Figs. .S, 4. 



1889. Protesephyllum dentatum Font.: Potomac Flora (Monogr. U. S. Geol. Siirv., 

 • Vol. XV), p. 286, pi. clvi, fig. 7; j)!. clx.xii, figs. 1, 4; pi. clxxiii, figs. 12, 14. 



Fifteen specimens of Protecephijllum dentatum occur in the collections 

 now being described. They are in the form of more or less complete, 

 detached leaves. Some of these are more complete than those described 

 in Monograph XV. The leaves of this plant, as there stated, are among 



"Professor Fontaine was in doubt as to whether this specimen really Iwlonged to P. marylandica , and 

 left it undetcrminefl. An examination of the specimens in the light of the drawings leaves no doubt in my 

 mind on this point, and I take the responsibilit.v of including it.— L. F. W. 



