300 THE POTOMAC OR YOUNGER MESOZOIC FLORA. 



deciirrent pair, and the following ones lower down, widely separated, and 

 alternate. PI. CLIII, Fig. 3, shows what seems to be the base of the 

 common petiole, and it looks as if it were clasping. This figure, however, 

 has the abnormal character of j)Ossessing only three leaves and all of them 

 terminal, the only case of the kind seen. 



Sapindopsis parvifolia, sp. nov. 



Plate CLIV, Fig. 6. 



Leaves and leaflets very small, leaves odd-pinnate; terminal leaflet 

 much larger than the others, united with the right-hand next lower leaflet; 

 uppermost leaflets subopposite, long-decurrent, united by a narrow wing 

 with the pair next below; second pair from the top subopposite, slightly 

 decurrent, not reaching to the next pair ; last or third pair subpetioled ; 

 midnerves comparatively strong, other nervation not seen ; leaves elliptical 

 in shaj^e, subacute, with the lamina of the leaf cut away obliquely on the 

 upper side; leaf-substance thick and leathery. 



Localities: 72d mile-post; bank near Brooke; White House Bluff"; 

 rare. 



This may be only a small form of S. variahilis. 



Sapindopsis brevifolia, sp. nov. 



Plate CLIII, Fig. 4; Plate CLV, Figs. 1, 7; Plato CLXIII, Fig. 3. 



Leaves odd-pinnate, terminal leaflet usually the largest ; leaf-substance 

 thick and leathery, obscuring the nerves ; terminal leaflet oval or elliptical, 

 sometimes slightly inequilateral, very wide in proportion to length ; lower 

 paired leaflets elliptical in shape, very short in proportion to the width, 

 sometimes slightly falcate, subacute or obtuse ; upper pair cut away 

 obliquely on the upper side nearly or quite to the midrib, decurrent on 

 the lower side, or subpetioled ; midnerve strong, lateral nerves not fully 

 shown ; the primai'ies are pinnately arranged, go off at equal intervals, and 

 arch slightly forward, the lower portions alone being seen. 



Localities: 72d mile-post ; bank near Brooke ; rare. 



This plant shows some variation, but not enough to cause a separation 

 into distinct species. In PI. CLXIII, Fig. 3, the terminal leaflets, all that 



