F. H. Knoidton — Fossil Dogwood Flower. 137 



Alaska and south to New Jersey, Ohio, Colorado, and 

 California. This species is herbaceous above and woody 

 at the base, with a whorl of leaves at the top, and long- 

 stalked flowers. The fossil species under discussion is 

 slightly larger than C. canadensis, has the bracts more 

 nearly elliptical than obovate, and seemingly thicker in 

 texture. No leaves of Cornus were found in direct asso- 

 ciation with this specimen, but the collection was a small 

 one and so such leaves might have escaped observation. 



\ 





i- 



2 



Figure 1. — Cornus speciosissima, new species, showing the four involucral 

 tracts. 



Figure 2. — Bract showing thickened tip. 



There are, however, two well-defined species in the Fort 

 Union, based on leaves, namely Cornus newberryi Hollick 

 and Cornus fosteri Ward. Judging from the size and 

 texture of the leaves of these forms they were shrubby 

 species and not of the herbaceous type of Cornus cana- 

 densis. Without being in any way positive about it, it 

 seems probable that Cornus speciosissima was borne on 

 a plant of the shrubby type, and not by one of the herba- 

 ceous type, although its flowers do resemble that of C. 

 canadensis. 



