144 THE FLORA OF THE DAKOTA GROUP. 



arched dowiiwanl, braiu-hing on both sides, and reaching the apices of short, 

 obtuse, entire lobes. 



As points of relation to the species I may quote C. paloiocantha Sap.,^ 

 a very small leaf or fragment of a leaf, witli the same characters of form 

 and nervation, and especially some varieties of C. oxi/acantha h., uhich, 

 however, has generally the lowest pair of secondaries emerging at a greater 

 distance above the base. 



Habitat: Ellsworth County, Kansas. Nos. 1190 and 1191 of the col- 

 lection of Mr. R. D. Lacoe. 



Pyrus? oretacea Newb. 



Later Ext. FL, p. 12; Illustr. Cret. and Tert. PL, PI. ii, Fig. 7. 



Tribe PRUNE^E. 



Prunus cretacea Lesq. 



Cret. Fl., p. Ill, PI. XXIII, Figs. 8, 9. 



Prunus (Amygdalus) ? antecedens, sp. nov. 

 PI. LV, Fig. 4. 



Leaves petioled, more or less broadly lanceolate, naiTowed to the apex 

 and to the base, entire; midrib'of medium size; secondaries curved, oblique, 

 camptodrome; nervilles and areolation obsolete ; nut oblong, pointed at the 

 upper end, truncate at base and there marked by a few strong, vertical 

 strife, flattened on one side along the border, rounded at the other. 



All that is observable of this ])eculiar plant is distinctly shown upon 

 the figure. One of the leaves is broader than the other but evidently 

 belongs to the same plant; the secondaries are at an angle of divergence of 

 35° from the midrib, parallel, equidistant, slightly curved in passing toward 

 the borders, effaced l)efore reaching them, camptodrome. The fruit, which 

 is convex on the surface and flattened on one side, .is there bordered by a 

 transversely striate band, truncate, roimded and marked by a few depressed 

 lines at the other, and pointed at apex, and is a little more than 3''"' long, 

 and 1.5*"" broad at the middle. 



The fragment, comprising fruit and leaves as figured, seems referable 

 to the section Amygdalus, of which a number of species have been published 

 from the Tertiary. In the characters of the leaves, the size, form, and 



' Etudes, vol. 1, pt. 2, p. 98, PI. xi, Fig. 4. 



