91 



ish, subcoriaceous texture, narrowed cuneiform at base, apparently petioled, 

 palmately three-nerved and three-lobed ; primary lobes deep to near the point 

 of union of the nerves; lateral ones cut in two much shorter divisions, or 

 bilobate by the forking of the lateral primary nerves, which branch at a short 

 distance above their base ; sinuses narrow, but obtuse. The upper part of 

 the lobes is destroyed. As far as can be seen from the specimen figured, the 

 leaf is five-lobed, with lobes diverging, like the nerves and their divisions, at 

 an acute angle of 30° to 35°. The lobes appear all entire. There is only 

 a trace of undulation on the upper part of the right lateral lobe, just near the 

 broken line of the leaf. Prof. Heer, in Keide Flora v. Moletin, (p. 18, PI. viii, 

 Fig. 3,) has described Aralia formosa, a three-lobate leaf with crenate lobes, 

 which is closely related to our species. It differs merely by having three 

 divisions only, and the borders obtusely crenate in the upper part of the lobes. 

 The Kansas leaf has, however, the upper half of the lobes destroyed ; and, from 

 a kind of undulation marked along the upper part of the outside borders, it 

 would seem as if the lobes, too, had been undulate dentate in their upper part. 

 This leaf, also, is much larger than that of Heer ; and it may be that, as it is 

 the case in some species of Aralia, the smaller leaves are merely trilobate, 

 and the large ones darted in five or more lobes by subdivision. As identical 

 between the European species and ours, we have the following characters: 

 tripalmate basilar nervation ; subcoriaceous substance of the leaves ; the same 

 wedge-form base of the leaves ; and the borders entire toward the base. 

 Habitat. — South of Fort Barker, Kansas, Mudge. 



Hedera ovalis, sp. nov., PI. xxv, Fig. 3, and PI. xxvi, Fig. 4. 



Leaves coriaceous, entire, oval, broadly obtuse, narrowed to tho base, pinnately nerved ; medial nervo 

 thick ; secondary veins alternate, irregular in distance, more or less numerous ; nervation mixed. 



In comparing the nervation and areolation of these leaves with our living 

 Hedera helix, L., their reference to this genus is obvious. The smaller leaves 

 show apparently the upper side ; the other, (of PI. xxv,) the lower, with the 

 veins and their divisions more marked, and the medial nerve increasing in 

 thickness toward the base by the connection of the secondary veins. The 

 leaves, whose petiole is broken, are thick, from 4J to 6£ centimeters long, 

 :\.\ to 4£ centimeters wide, oval, round-obtuse, narrowed by a curve a little 

 more on one side than on the other, or slightly unequilateral. The secondary 

 veins are either curved near and along the borders or passing up and enter- 

 ing them ; the areolation is in large, irregular meshes, by nervilles anasto- 

 mosing with divisions of the secondary veins, in various angles of divergence. 



