Korthalsella, Bifaria, and Pseudixus. 



By 

 E. D. Merrill. 



Dr. B. Hay ATA has recently proposed the new generic name 

 Pscudixus^^ for the plant commonly known as Viscum japonicum 

 Thunb., and has given very convincing reasons for considering 

 this species to represent a distinct generic type, especially in his 

 discovery that the stamens are alternate with the perianth 

 lobes. However, in proposing the new name Pseudixus, the fact 

 was overlooked that two other names had already been pro- 

 posed b}' Van Tieghem, one of which must be typified by 

 Viscum japonicum Thunb. 



In the course of his consideration of the genera of Loran- 

 thaceae Van Tieghem proposed first the genus Korthalsella,'^ 

 followed a month later by a second consideration of Korthalsella 

 and the ])ublication of Bifariaj;^^ a very closely allied genus. 



Korthalsella was based on a Hawaiian species, K. remyana 

 Van Tiegh., and to this genus in his following paper Van 

 Tieghem added K. wawrae and K. divaricata from Hawaii, K. 

 horncana from Viti, and K. salicornioides (Cunn.) from New 

 Zealand and the Isle of Pines, south of New Caledonia. 



Korthalsella and Bifaria arc contrasted thus b}' Van 

 Tieghem : ,, Sur la tige des Bifaria, les ecailles sont a la fois 



1) On Pseudixus, a new genus ot" Loranthiiceae founckil on the well known and 

 widely distributed species V^iscum japonicum Tiiukb. Bot. Mag. Tokyo 29: 31-34. 

 1»15. 



2) Koiihalsella, genre nonveaii pour la I'lunillc! des LurauthaccJes. Uull. Sul- Bot. 

 l">ance 43: 8.3-87. 1896. 



3) Sur le groupement de.s especes en genres dans les Ginalloees, Eil'ariees, 

 Plioradendrees et Visc^ea, quatre tribua de la faniille des Loranthac^es. Op. Lit. 43: 

 lGl-194. 1S96. 



