RvDBERG : Rocky Mountain flora 147 



CORNELIA Rydb. gen. no v. 

 The type of the genus Coniiis L. is C. mas L. which has no 

 congener in this country, except perhaps C . sessilis Torr. of Cah- 

 fornia. Opiz segregated from Connis the genus Svida, to which 

 the pAiropean C. saiiguinca and most of our American cornels 

 belong. Rafinesque in his Alsographia Americana made the 

 genus Cynoxyloii based on C.florida L., and also another genus 

 (or subgenus) Eiikrania in which he placed C. canadensis L. and 

 C. snccica L. Unfortunately he made C. inascjtla of Europe, 

 which is congeneric with and some claim the same as C. vias L., 

 the type, and C. canadensis and C. snccica have no available generic 

 name, unless they are included with C.florida and C. Nnttallii \\\ 

 Cynoxylon. Outside of the great difference in habit and fruit be- 

 tween the Dwarf Cornels and the Flowering Dogwoods, the former 

 have one character not found in any of the groups usually included 

 in Cornns. The sepals of the Dwarf Cornels have a small horn- 

 like, at last deciduous, spine on the back near the apex. This, 

 together with the peculiar habit, makes them deserve generic rank. 



Cornelia canadensis (L.) Rydb. 

 Cornns canadensis L. Sp. PI. ii8. 1753- 



Cornelia suecica (L.) Rydb. 

 Cornns snccica L. Sp. PI. ii8. 1753- 



Cornelia unalaschkensis (Ledeb.) Rydb. 

 Cornns nnalasclikoisis Ledeb. Fl. Ross. 2: })'j'^. 1844. 



Pseudocymopterus multifidus Rydb. 

 Psendocynwptcrns niontanns ntnltifidns Rydb. Bull. Torrey Club 

 31 : 574. 1904. 



Pseudocymopterus purpureus (C. S: R.) Rydb. 

 Psendocymoptenis niontanns pnrpnrcns C. & R. Rev. N. Am. 

 Umbell. 75. 1S88. 



Pseudocymopterus tenuifolius (A. Gray) Rydb. 

 Thaspinm niontannni tcnnifolinni A. Gra}', PI. Wright. 2 : 65. 

 1853- 



