348 GEOLOGICAL SURVEY OF THE TERRITORIES. 



GAMOPETALE^. 



BICORNES. 



Andromeda parlatoeii, Heer, Cret. Flora, p. 88, PI. XXIII, figs. G-7 ; 



PI. XXVIII, fig. 15. 



Leaves lanceolate, narrowed to the hasc and decurring along the petiole hy a 

 narrow border, entire; middle nerve thiclc; secondary veins at an acute 

 angle of divergence, parallel, camptodrome. 



Andromeda affinis, sp. nov. PI. Ill, fig. 5. 



Leaf thickish, narroicly lanceolate, narroiced to a long acumen, gradually 

 decreasing totvard the base ; borders entire ; middle nerve comparatively 

 thixik ; lateral veins close, parallel, suhequidistant, in an acute angle of 

 divergence ; areolation minute. 



The leaf five and one-half centiffielers long, eleven millimeters broad 

 in its widest part, the middle, is gradually equally narrowed down to 

 the petiole and up to a long narrow acumen, and entire ; the secondary 

 veins are numerous, simple, at an angle of divergence of 30°, parallel, 

 rather obsolete, though thickish, scarcely curving in ascending close to 

 the borders, camptodrome; the areolation is in round or quadrate polyg- 

 onal minute areolse. It is closely allied to the former species, if not a 

 variety of it. 



Habitat. — Spring Canon, where it is mixed with fragmentary leaves 

 of Ayidromeda parlatorii ; the horizon of this locality is not geologically 

 determined, Dr. F. V. Hay den. 



DiosPYEOS AMBIGUA, Lesqx., Cret. Flora, p. 89, PI. VI, fig. 6. 



Leaf coriaceous, narrowly oval, narrowed near the point into a short 

 slightly obtuse acumeii; borders entire; nervation pinnate, camptodrome. 



DiosPYROS ROTUNDIFOLIA, Lesqx., Cret. Flora, p. 89, PI. XXX, fig. 1. 

 Leaf subcoriaceous entire, nearly round, pinnately nerved; secondary 

 veins parallel, camptodrome ; surface undulate, polished. 



POLYPETALE^. 



Umbelliflorje. 



Aralia tripartita, spec. nov. PI. I, fig. 1. 



Ijcaf small, three palmatcly divided to two-thirds of its length; lobes 

 equal, linear obtuse, entire ; secondary nervation obsolete. 



The leaf is seven centimeters long, six centimeters wide between the 

 points of the lobes, which diverge in an angle of 25°; cuneate to the 

 base, which apparently descends a little lower than the point of union 

 of the primary veins, where it is broken ; lobes four and one-half centi- 

 meters long, one centimeter broad, nearly exactly linear, abruptly 

 rounded ot the point, with perfectly entire borders and obtuse sinuses; 

 primary nerves thin but distinct, secondary veins totally obsolete. The 

 surface is smooth and the consistence of the leaf coriaceous. 



This small leaf appears like an original simple representative of a type 

 of Aralia i^redominant in numerous diversified forms in the Dakota 

 group. 



Habitat. — Near Fort Harker, Kansas, Chs. Sternberg. 



