738 GEOLOGY OF THE YELLOWSTONE NATIONAL PARK. 



SAriNDUS GRANDIFOLIOLdlDES 11. sp. 

 PI. C, flg. 2. 



Leaflets large, of firm texture, ovate-lanceolate, unequal-sided, rounded 

 at base to a well-inarked winged petiole, apex acute, slightly falcate; 

 midrib of moderate strength, straight; secondaries aliout 7 or 8 pairs, 

 strongh- alternate, emerging at a low angle and soon curving up and 

 passing along near the border; the secondaries on the narrower side of 

 the leaflet emerge at a greater angle (30'= to 45°) than on the opposite 

 side: finer nervation not preserved. 



Tlie specimen figured is absolutely perfect so far as outline and 

 principal nervation go. It is just 10 cm. limg and 3.7 cm. wide in the 

 l)roadest portion, which is a little Ijelow the middle. The margin is 

 slio-htlv undulate, almost toothed in one iiart. 



This species so closely resembles Saplndus (jyimd'ifoJiolus Ward' from the 

 Fort Union iii-ouj), that I liave named it grandifoliohkles. It difters, liowever, 

 from the latter in being more markedly insequilateral and in liaving a 

 Avinged petiole. It also lias fewer secondaries than S. (jrand'ifoliolus. 



This species is also related to S. ohtiisifoUus Lx.,' found in the Fort 

 Union group. From this it difters in having half the number of second- 

 aries and a winged petiole, otherwise being much the .same. 



Professor Ward's S. <datus'^ from the same jjlace as <S'. f/randifoliolits has 

 a wino-ed petiole, but difters in Ijeing much smaller and in having a liroken, 

 loose nervation. It is ])o.ssible, however, that if more material could ha 

 obtained it could be referred to one or the other of these evidently related 

 forms. 



Habitat: Northeast side of hill above Lost Creek, bed No. 1, collected 

 by F. H. Knowlton, August 8, 1888. 



8aPIN1)US WARDII 11. sp. 

 PI. XOVIII, tigs. 1. -J; PI. XCIX, tig-. .-,. 



Leaflet coriaceous, liroadly lanceolate, rounded wedge-shaped at base, 

 with long acuminate falcate apex; margin perfectly entire: midrib thick, 



' Types of tbe Laramie Fl., p. G7, PI. XXX, 1a«;a. 3-5 (1887). 

 ^Cret. and Tert. Fl., p. 23.->, Pi. XLVIII, figs. 5-7 (1883). 

 sOp. cit., p. 68, PI. XXXI. tig. 3, 4 (1887). 



