160 REPORT OF AN EXPEDITION DOWN THE 



GROSSULACEjE. 



Ribes irriguum, Dougl, in Hort. Trans., 7, p> 516 ; Torr. and Gray, Fl. 1, p. 

 547. San Francisco mountain 



R. cercum, Doughl. 1. c. ; Torr. and Gray, 1. c. Zuni mountains; August: 

 in flower and fruit. 



R. aureum, Pursh, Fl. 1, p. 164; Torr. and Gray, I. c. On Yampai creek. 



SAXIFRAGACEtE. 



Heuchera rubesccns, Torr. in Stanbs. Rep. p. 388, t. 5 ; Gray, PI. Wright. 2,. 

 p. 65. Western part of New Mexico ; October. The specimens belong to the 

 large form collected by Mr. Wright and described by Dr. Gray, (1. c.) 



UMBELLIFER/E. 



Berula luigustifoliu, Koch, Fl. Germ, and Helv. 2, p. 317 ? Gray, PL Fendl 

 p. 55, and PI. Wright. 2, p. 65. Slum pusillum, Nutt. in Torr. and Gray, Fl. 

 1, p. 611. S. ? incisum, Torr. in Fremont's Rep., p. 90. Helosciadium? Cali- 

 fomicum, Hook, and Am. Bot. Beech., p. 142? On the Laguna ; August. 



This plant is widely diffused through the United States. I have specimens 

 from Michigan, collected by the late Dr. Wright; from East Florida, sent by Mr. 

 Buckley ; from Col. Fremont, collected on the north fork of the Platte. Dr. 

 Gray has also, in the works quoted above, enumerated several other stations for 

 it. It was found by Dr. Pickering in Oregon, from whence also Mr. Nuttall ob- 

 tained his Shim pusillum, which is pretty certainly our plant. If the plant of 

 Beechey be the same, then it is also a native of California. 1 have carefully 

 sought, as Dr. Gray has also done, for characters to distinguish it specifically 

 from the European B. ungustifolia, but have not found them. The chief differ- 

 ences are the narrower fruit, and the entire (not subincised) leaflets of the invo- 

 lucre. 



Peucedanum tritematum, Nutt. in Torr. and Gray, Fl. 1, p. 626. Seseli biterna- 

 lum, Pursh, D. C. Prodr. 4, p. 196 ; Hook. Fl. Bor. Amer. 1, p. 204, t. 94. La- 

 guna Enematio : October : in flower and fruit. 



LORANTHAOEE. 



Pfioradendronjlavescens, Nutt. in Jour. Acad. Philad., (n. ser.) l,p. 185; En- 

 gelm. in Gray, PI. Fendl., p. 59, and in Gray, PI. Lindli. 2, p. 213. Viscumfia- 

 vescens, Pursh, Torr. and Gray, Fl. 1, p. 654. Western part of New Mexico ; 

 November. 



P. juniperinum, Engelm. in Gray, PI. Fendl. 1. c. Parasitic on Juniperus. 

 Little Colorado, and on the San'Francisco mountain. 



P. Calif or nicum, Nutt. 1. c. Engelm. in Gray, PL Lindh. 2, p. 213. Parasitic 

 on Strombocarpus. Colorado of California ; November ; in fruit. 



