OLDKK rOTOMAC OF VIKXilNlA AM) MAKYLAM). 497 



(his species and M. virg}7}ie7}.ns. The size of the loaves varies somewhat. 

 An a\-ci'age size is I'opreseuted in PI. CTX, Fig. 2, which gives a nearly 

 coinplelo leaf with the basal part well preserved. This was prol)ai)ly 

 a leaf not cjuit(> (i cm. wide and a little more than 5 cm. long. This is 

 prol)al)ly a leaf not of normal shape, for the transverse diametei' in these 

 leaves was prol)al)ly greater than the vertical, giving a snl)r(Miifoi-m 

 shape. Professoi' Ward has written on the label of another specimen 

 of Menispermites in the Mount Vernon collections the name M. reni- 

 fonnis Dn. This too is prol)ably M. fenuincrvis, but it was a leaf above 

 the noi'mal size, as it was {jrobably at)out 7 cm. in its transverse and 

 greater diameter. This leaf is represented in PI. ('IX, Fig. 'A. 



The material available for description in Monograph XV did not 

 permit a full determination of the plant. We may, with the help of 

 the Mount Vernon specimens, add the following to its description: 



The leaves were mostly small, rotundate, or subreniform in shape, 

 with the transverse diameter the greater, attaining a maximimi of 7 cm. 

 The margin was entire or slightly undulate. The texture was thin. 

 The nerves of all orders are slender. The divergence of the principal 

 nerves takes place from a point within the lamina of the leaf, but nearer 

 the base than in the leaf of M. virginiensin. The general plan of the 

 nervation and the mode of its division are similar to those points in 

 M. virginiensis. 



PiNus VERNONENSis Ward n. sp." 



PI. ('IX, FifTs. 4-6. 



A single specimen of a small winged seed was obtained in the Mount 

 Vernon collections. It was named by Professor Ward, on the label, Pinus 

 vernonensis, but no description was given. It does not seem to be the 

 same seed as P. schista. It is, in the seed proper, of about the same shape 



"Throo winged .seeds occur in the collections, all collected on November (i, 1892, at the Mount Vernon 

 locality, two of them in counterparts, wliicli I had named as above before sending the colle(^tions to Professor 

 Fontaine. He found only two of these, one of which he was disposed lo identify with the species from Rosiers 

 Bluff (see p. .5:W), but remarked tliat the wing was not cleft, which i.s the leading character of that species. 

 The other he labeled with tlic name I had given it. I can not see that these seeds dilTer specifically and will, 

 therefore, include them all imder this species, which has the following character: 



.Seeds small, 12 nnn. long, the wing 9 mm. long, ."> nmi. wide above the middle, rounded at the apt'.x, nar- 

 rowing toward the point of attachment, the sides une<|ually curved, linely striate: tlii' seed ])ro|)er 5 mm. 

 long by ,'J mm. wide. — L. F. W. 



.MO.s .XLviti — 0.5 32 



