FOSSIL FLORA. 737 



alsd l)e notc'.l that Newberry's material docs not show the leaflets as peti- 

 oleil, but ill the description of ,S'. affink he says, "leaflets * * * sessile 

 or short-petioled." 3Iany of the detached leaflets in his material, named in 

 his handwritnig, are distinctly short-petioled, in which particular the Park 

 specimens agree. Some have, it is true, very short petioles, yet all seem 

 to have them. 



In only two cases have leaflets been found in this collection attached 

 to the racliis, and these have lioth lieen flgnred. 



Habitat: Yellowstone River, one-half mile lielow the mouth of Elk 

 Creek- found throughout the section, and most alnmdant at the Ijottom; 

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



? Sapindus alatus Ward. 

 SiipindH.s alatK.s Ward: Types (if the Laramie FL, p. 08, PL XXXI, figs. 3, 4. 



This specimen is the only one that I venture to refer to this species. 

 It was f.)und in the same beds with the abundant -S-. affinis Newby., and 

 possibly may he an abnormal or unusual leaflet of that species. It is, how- 

 ever, more regular, and has the thick or winged petiole of <S'. alatus. 



Hal)itat: Yellowstone River, one-half mile below the mouth of Elk 

 Creek, Yellowstone National Park; top of bluft', 3()() feet above the river; 

 collected by F. H. Knowlton, Aui^ust, 1888. 



Sapindus GRANoiFOLioLrs Ward. 

 PI. XCIX, tigs. 1, 2; PL on, flg. 4. 



Sa2nndus grandifoUolm Ward: Types of tlie Laramie PL, p. (J7, PI XXX tigs 3-5- 

 PL XXXI, figs. 1-2. ^, .. , 



Several small doubtful leaves are referred to tliis si)ecies. One in 

 particular has some resemblance to leaves of Jiif/hat.v ni(/osa Lx., Init seems 

 to be closer to the Sapindus gmndifoUolus of Ward. 



Habitat: Fossil Forest Ridge, bed No. (5, "Platanus bed;" collected 

 by Ward and Knowlton, August, 1887. Also found on the south side of 

 Stinkingwater Valley, on a high blutf east of incmth of Crag Creek, col- 

 lected by F, P. King for Arnold Hague, September 4, 1897. 



MON XXXII, PT II 47 



