102 THE FLORA OF THE DAKOTA GROUP. 



Sassafras (Araliopsis) papillosum, sp. uov. 

 PI. VI, Fig. 7. 



Leaves Inrj^c, paliiiMtcU' triloliate; liiteval nerves rlivergini;', soinewliat 

 nrclied (lownwiird; honU-rs iU'Vitely dentate all arduiid, teeth entered l)y the 

 seeondaries and their branches, sharply jtointed, papillose at apex; primary 

 nerves three, very thick; secondaries oblique, parallel, more or less branching-. 



The fragment figured is the only part known of this beautiful leaf, 

 \vhich measured at least 22""" between the extremities of the lateral lobes 

 and a])(mt 20""" in length without the petiole. The teeth are not large, but 

 all al)out equal, turned outside, separated by shallow, half-round sinuses, 

 each bearing at the apex a round black pulverulent point like a small flat- 

 tened fleshy knot. The primary and secondarj' nerves are very thick; the 

 lateral lobes and the secondaries are at an angle of divergence of 40° to 4.5° 

 and the areas are traversed by strong, flexuous nervilles, simple or forking- 

 and at right angles to the nerves. 



Though the genei'al aspect of the fragment is like that of a leaf of 

 Platanus, it has a more evident relation to S. (Araliopsis) niirahilc Lesq., 

 from which it differs merely by the enlarged lateral lobes, the acutely d(Mi- 

 tate borders and the papillose teeth. Like the preceding species this has a 

 marked degree of affinity to Platanus prhnceva Lesq., and its A^arieties. 



Habitat: fjllsvvorth County, Kansas. No. 1!) of the museum <»f the 

 University of Kansas. Collected by A. Wellington. 



Sassafras (Araliopsis) cretaceum Newb. 



Later Ext. Fl., p. 14, lUustr. Cret. and Tert. PI., PI. vi. Pigs. 1-4, fragment of leaves; 

 Lesquereux, Cret. Fl., p. 80, PI. xi. Figs. 1, 2 ; PI. xii. Fig. 2. 



Sassafras (Araliopsis) oretaceum Newb., var. obtusum Lesq. 

 Cret. Fl., p. 80, PI. xii, Fig. 3 ; PI. xiii, Fig. 1. 



Sassafras (Araliopsis) mirabile Lesq. 



Cret. Fl., p. 80, PI. xii, Fig. 1. 



Platanus laiiloba Newb., Later Ext. Fl., p. 23, Illiistr., Oret. and Tert. PI., PI. ii, Fig. 4. 



Sassafras (Araliopsis) recurvatitm Lesq. 



Oret. and Tert. Fl., p. 57. 



I'lataniis remirvata Lesq., Cret. Fl., jt. 71, PI. x, Figs. 3 5, 



