NYCTAGINACEvE. 435 



They were overlooked when I was describing the plant in the work 

 just quoted. Before receiving the flowers from Dr. Bigelow and Dr. 

 Hulse, I supposed the plant might be a variety of A. tomentosa, which, 

 in foliage, it greatly resembles. 



2. A S A E U M, Tourn. 

 1. As ARUM caudatum, Lindl. 



Asarum caudatum, Lindl. Bot. Reg. t. 1399. 



A. Hookeri, Fielding, Sert. Plant, fol. & tab. 32 ; Torr. 1. c. 



A. Canadense, var., Hook. Fl. Bor.-Am. 2, p. 139. 



Hab. Oregon and California. — All our specimens have the long at- 

 tenuated lobes of the corolla, and I have seen no forms intermediate 

 between this species and A. Canadense. It is also taller and more 

 disposed to branch than the eastern plant, but the root has the same 

 warm aromatic taste. It is, however, bitter. 



Ord 66. NYCTAGINACE^E. 



1. A B RON I A, Juss. 



1. Abronia mellifera, Dougl. in Hook. 



Abronia mellifera, Dougl. in Hook. Bot. Mag. t. 2879 ; Choisy in DC. Prodr. 13, 

 2, p. 435 ; Torr. in Bot. WhippL, excl. var. nana. 



Hab. Banks of the Walla- Walla River, Oregon. — In revising the 

 species of Abronia, I am led to the conclusion that A. mellifera of the 

 Botany of the Mexican Boundary Survey embraces two distinct spe- 



