158 THE FLORA OF THE liAKOTA GROUr. 



Kttiufifsliauscn's species, wliicli some l)()t;iiiists consider ;is of liypotlietical 

 rctereuce, no le;if of Acer has })een descrilxMl tnmi the ( 'eiimuaiiiaii. lUit 

 before tlie ]>laiifs of tlie Dakota Grou]) and thosi' of the Cretaceous oi' 

 Greeiilaiid had been discovered, the same remark could have been made 

 with reference to most of the genera now well ascertained in that forma- 

 tion. A closely allitid genus, Sapindus, is represented by different species 

 in the Cenomanian of Gi-eenland and of North America, and T do not see 

 why the origin of the genus Acer could not be admitted as possil)le in that 

 formation. 



Habitat: Ten miles northeast of Delphos, Kansas. Nos. 4()7S, 4079, 

 4080, 4082, etc., of the collection of Mr. II. D. Lacoe. 



Order SAPINDACE^. 



Tribe SAPINDE^E. 



Sapindus Morrisoni Lesq. 

 PL XXXV, Figs. 1, 2. 



Cret. anil Tert. Fl., p. 83, PI. xvi, Figs. 1, 2; Heer, Fl. Foss. Arct., vol. fi, Abtli. 2, 

 p. 96, PI, XL, Fig. 1 ; PI. XLI, Fig. 3; PI. XLiii, Figs, la, b ; PI. XLIV, Figs. 7, 8. 



Leaves compomid, pinnate; leaflets sulicoriaceous, entire, lanceolate, 

 imequal at the round, cuueate l)ase; secondaries numerous, curved, camp- 

 todrome. 



The two leave.? figured here are slightly smaller than those in (Jret. and 

 Tert. Fl. (loc. cit.), butof the same character. The difference in size is more 

 marked in the leaves figured by Heer, especially in those of PI. xliv, Figs. 

 7, 8. <S'. prodromus Heer^ has the leaves smaller, subfalcate, and the second- 

 aries closer ami more numerous. 



Habitat : Pipe Creek, Cloud County, Kansas. Nos. 4087 and 4094 of 

 the collection of Mr. R. D. Lacoe. 



Sapindus diveusifolius, sp. nov. 

 PI. LXIV, Fig. IS. 



Leaflets veiy variable in size and form, short, oval, obtuse or lanceolate 

 from above the middle, 4™ to IP"" long, 2""^ to f)™' broad, the largest appar- 

 ently terminal and obovate, all with borders entire; strongly nerved; midrib 



' Fl. Foss. Arct., vol. 3, pt. 2, p. 117, PI. xxxiv, Fig. 5; vol. 6, Abth. 2, p. 96, PI. XXV, Fig. 5b; 

 PI. XXVI, Fig. 5a. 



