96 THE FLORA OF THE DAKOTA GROUP. 



little longer, all blunt or apiculate at apex, enlarged at the middle, narrowed 

 to the obtuse, narrow sinuses ; secondaries numerous, camptodrome. 



The leaves resemble those of Sassafras cretaceum Newb. They are 

 generally smaller, also more delicate in appearance and of thinner texture, 

 ()'■'" to 7*"" long, 4.5""' broad in the middle and between the apices of the 

 lobes, entire. The divergence of t]u\ lateral primaries from the median 

 nerve is scarcely 30^. In all their charactei's, form, size, texture, and nerva- 

 tion, these leaves closely resemble those of L. triloba Blume, of Japan. 

 The most marked difference is in the division of the primaries, which are 

 l)asilar in the fossil leaves, while they are generally supi'a-basilar in those 

 of L. triloba, the leaves of which also have the lobes actiminate ; but their 

 form as well as that of the nearly rounded sinuses is the same. 



Habitat: Ellsworth County, Kansas. Found in numerous concretion- 

 ary specimens, mostly of small leaves. Nos. 656 and 657 of the museum 

 of the University of Kansas. 



LiNDEKA MASONI, Sp. nOV. 



PI. XVIII, Figs. 9, 10, 



Leaves narrowly cuneate to the decurrent base, enlarged, flalielliform 

 above, palmately deeply trilobate; lobes entire, obovate, rounded and 

 apiculate at the apex, separated by very narrow, obtuse sinuses, palmately 

 trinerved from above the base ; primary nerves rigid, though narrow ; sec- 

 ondaries .short, alternate, curved, camptodrome. 



The leaves are rather meml^ranous than coriaceous, though somewhat 

 thick, 7""" long, 5"" to 6"°" between the points of the lateral lobes, narrowed 

 by an inward cm-ve and decurring to the petiole, which is slender and broken 

 below the base of the leaf ; the secondaries are short, mostly obsolete. 



This leaf is very similar to those of the preceding species, differing by 

 its larger size, the long narrowed and decurring base, the supra-basilar 

 position of the lateral primaries and the scantiness of the scarcely distinct 

 secondaries. The textm'e of the leaf appears also more dense. 



Habitat: Four miles southwest of Brookville, Kansas. No. 4135 and 

 countei-jjart of the collection of Mr. R. D. Lacoe. 



LiTSEA CRETACEA, Sp. IIOV. 

 PI. XV, Fig. 2. 



Leaf coriaceous, entire, narrowly oblong-lanceolate, gradually tapering 

 upward to a long acumen, more rapidly narrowed to the l)ase and decurring 



