DESCRIPTION OF SPECIES. 125 



ViBXIRNITES MASONI, sp. UOV. 



PI. XLV, Fig. 5. 



Leaves coriaceous, round', subcordate at the entire base, obtusely short- 

 dentate, subtrijiahnately nerved; median nerve strong-; priniarv Literal 

 nerve supra-basilar, oi)posite and oblique like the secondaries, which are 

 equidistant and parallel to it ; basilar primaries t^vo pairs at right angles, 

 the upper branching- on the lower side, anastomosing in bows with the lower 

 one, quite thin and marginal; secondaries eompound-craspedodrome, branch- 

 ing and anastomosing toward the borders in oblique subdivisions, and 

 ner\alles forming rows of angular meshes. 



This leaf diflFers from Protophylluin by the characters of the areolation 

 and the sul)di\-isious of the secondaries toA\nrd the borders of the leaves, 

 where they branch first obliquely, and by the anastomosis of branchlets 

 in oblique and even rectangular directions ultimately enter the teeth by 

 nervilles, as in species of (Irewiopsis. The leaf is 9""' broad and about 

 7.5"" long, the petiole being broken near the base of the leaf 



Habitat: Ellsworth Count}', Kansas. No. 02 of the museum of the 

 University of Kansas. Collected by A. Wellington. 



Order CORNACE^. 



CoRNUS PRECOX, SI), nov. 

 PI. XXIII, Fig. 5, 



Leaves polished on the surface but not thick, elliptical, tapering upward 

 to a long acumen; narrowed in an outward curve to the base and decurriug 

 to a short petiole, entire; median nerve rigid; secondaries inequidistant and 

 parallel, at an acute angle of divergence, nmch curved in traversing the 

 blade, simple or forking above the middle. 



One leaf only of this kind has been found. It is >>"" long, 3..')'"'" broad 

 at the middle, somewhat undulate, with seven ])airs of secondaries at an 

 angle of divergence of 40°, those of the three lower and of the ui)j)er ]);iii- 

 opposite those of the middle alternate, either simple or forking in parallel 

 branches, which with the same degree of curve ])ass towards the borders 

 and follow them quite near in long bows. 



This fine leaf, remarkable for the forking of the secondai-ics, lias a dis- 

 tinct aifinitv witli that described as C. Buchli Heer', being of the same form. 



' Ettiugshausen, Fl. Foss. v. Sagor, pt. 2, p. 22, PI. xiv, fig. Z\. 



