LESQUEKEUx.] ENUMEEATION OF CRETACEOUS PLANTS. 357 



outline, or longer, noA-roiced to an oMuse point, peltate from near the base, 

 suhtrilobate, fiveimlmately nerved, deeply undulate. 



The fig. 3 of PL YII of this memoir bas been given here on account 

 of the good preservation of the leaf clearly exposing the characters of 

 the genus. Comparing it with the figures of the same species in the 

 Cret. Flora, its cliaracters appear evidently identical. From tbe large 

 leaf, fig. 1, PI. XXII, it differs in no manner whatever except by its size, 

 showing, therefore, that this fine leaf is, as remarked, a mere variety of 

 the normal form. But more than this, by comparison of the distribution 

 of the veins and of the essential characters of the nervation in the fol- 

 lowing species, it proves their relation to this generic division, which 

 has two definite sections, represented one by lobate, the other by en- 

 tire leaves. 



Habitat.— Clay County, H. C. Toicner. 



Meotspeemites Saeinensis, Lesqx., Cret. Flora, p. 95, PI. XX, figs. 1, 4. 

 Leaves thicMsh, membranaceous or subcoriaceons, triangular in outline, 

 deeply undulate-lobed, or palmately Jive-lobed from, the border base, icMchis 

 enlarged and truncate. 



ME:NT:sPEE:inTES ACEErFOLius, Lesqx., Cret. Flora, p. 96, PI, XX, figs. 



2 and 3. 



Leaves small, triangular in outline, palmately obtusely tliree-lobed, wedge 

 form, or abruptly narrowed to the base ; nervation three-palmate. 



Me^^ispermites POPULiEOLius, sp. nov. PI. V, fig. 3. 



Leaf broadly ovate, obtuse, subcordafe at the base, jive-palmately nerved 

 from the border base, primary nerves in an open angle of divergence, dividing 

 on the lower side, lilce the secondary veins, all camptodrome. 



The leaf is broadly ovate, perfectly entire, coriaceous, five and one- 

 half centimeters long, and as broad below the middle, where it is some- 

 what enlarged; five palmately nerved from the base, the lateral veins 

 diverging about equally in an angle of 30° from each other, so that the 

 inner one ascends to the two thirds of the leaf, the second to below the 

 middle, and the basilar veiulets are in right angle to the midrib. The 

 primary veins branch on the outside, anastomose with nervilles, and 

 the exterior ones curve along and follow the borders; the secondary 

 veins are at an open angle of divergence of 60°, separated by strong 

 nervilles at right angle to the middle nerve. The areola! ion is obsolete. 



Habitat. — South of Fort Barker, Kansas, Chs. iSternberg. 



MENisPER:vnTES ovALis, sp. nov. PI. V, fig. 4. 



Leaf narroicly oval oblong, obtuse rounded at the base ; five palmately, 

 nerved ; lateral veins on an acute angle of divergence, the inner ones as- 

 cending to near the top, branching outside ; branches numerous, parallel, 

 curving along the border in multiple festoons. 



This fine leaf, preserved nearly entire, is subcoriaceous, seven and one- 

 half centimeters long, three and one-half centimeters broad, nearly exactly 

 oval-oblong, perfectly entire and rounded to the base. The palmately 

 five nervation is less definite than in the former leaf; the two internal 

 lateral veins are as strong as the middle nerve, curve gradually in the 

 same direction as the borders, and, near the top, join the branches of the 

 midrib, with which they anastomose in curves ; the outside lateral veins 

 are thinner and shorter ; they ascend nearly parallel to the borders, but 

 disappear in the middle of the leaf in anastomosing with branches of the 

 inside primary veins. In comparing this nervation with that of the 



