DESCRIPTION OF SPECIES— ERICACE^. 233 



D i o S |» y r o s T%' o d a ii i , XTng 



Plate LIX, Fij,'. 13. 



IHonpyron Wodani. Ung., Gen. et Sp., p. 435; Sillog. Plant., iii, p. 27, pi. ix, figs. 10 and 11. 

 Calycites hexaphylla, l.esqx., Annual Keport, 1872, p. 40a. 



Calyx hexapbyllouB, open; sepals linear, obtuse, two centimeters long, free to the base; surface 

 striate. 



When I first described this species, I did not consider it as possibly iden- 

 tical with (hat of Unger, described in the Genera et Species as pentaphjllous. 

 I have since obtained his Silloge, where the species, represented as quoted 

 above, appears really to have six sepals, like ours. Indeed, Unger's figures, 

 compared to the one of our plate, do not show any diflerence, except that its 

 sepals are more exactly linear, and not as enlarged in the middle. The dif- 

 ference is evidently caused by casual deformation in the fossilization; for one 

 of the sepals of the specimen figured here is enlarged near the base, as if 

 the borders were there expanded, while they are recurved above; one of the 

 branches is equally enlarged in the upper part, and another on the right side, 

 casually truncate, should, if preserved entire, have the same size and shape as 

 those of Unger's species. His fig. 11 shows the same modifications of forms 

 as ours. 



Habitat. — Evanston, Wyoming; one specimen only. 



ERICINE.E. 

 ERICACE^. 



It is remarkable that in this order of plants, so generally and promi- 

 nently represented in the floras of our time, we have thus far found so few 

 fossil species in the North American Tertiary. Leaving out of consideration 

 the exotic living species, which in South Africa and Brazil are counted by 

 the thousand, we find described by the botanists of our time one hundred and 

 twelve species in the flora of the United States alone. Their distribution is 

 varied, according to climatic circumstances: the Northeast has sixty-seven, 

 of which nineteen are proper to it; the South has fifty-five, fifteen of which 

 are limited to this region; California has thirty peculiar western species in 

 forty-one of its flora. This distribution should imply the presence of Ericacea: 

 in all the groups of the North American Tertiary, however different may have 

 been the atmospheric influences at the epochs. A distribution of this kind 

 is remarked in the European Tertiary, where the paleo-botanists have recog- 

 nized more than seventy species referable to the genera which are still repre- 

 sented in the North American flora, and distributed about in equal proportion 



