54 ERYTHEA. 



earlier collections. Tracing his route on local maps by the aid of 

 our present knowledge of the geographical distribution of the plants 

 he collected and by aid of the landmarks described in his journal, 

 we are enabled, through a comparison of the numbers of his journal, 

 with those of his California collection in the Plantse Hartwegianse, 

 to give for the first time the exact station of a number of his new 

 plants, and a somewhat more definite locality for some others. It is 

 very desirable in many instances that a full series of specimens of 

 Hartweg's plants should be collected from the original station or 

 region. Even at this late period there are few cases in which this 

 has been done. 



Ranunculus canus, Benth. The discovery of this species is thus told 

 by Hartweg: "On April 13, I left [the junction of the Yuba and Feather 

 Rivers] with Mr. L. for his farm, seventy miles higher up in the valley. 

 . . . Crossing Feather River, which here is eighty yards broad, and 

 of considerable depth, our course lay five and twenty miles along that 

 river, through a beautiful wood of evergreen and deciduous oaks. . . . 

 Leaving Feather River we struck across a prairie for twenty miles; here 

 immense fields of Eschscholtzia crocea, E. californica and Ranunculus, 

 No. 239, presented themselves, each species growing by itself." The 

 Ranunculus mentioned here is the R. canus of Bentham, wliich has 

 never been recollected. One is inclined, therefore, to venture the 

 thought that the collector may have made a mistake concerning the 

 locality or the abundance of the species. That HartM'eg labeled his 

 plants with the greatest care has, however, been abundantly proved by 

 all subsequent explorations in the State. 



Ranunculus Californicus, Benth. In woods about Monterey. 



Delphinium patens, Benth. Plains near the junction of the Yuba and 

 Feather Rivers. 



Thysanocarpus radians, Benth. With the preceding. 



Viola lobata, Benth. Foot-hills of the Sierra, Butte County. 



Linum Californicum, Benth. Marysville Biittes. 



Polygala cucullata, Benth. In woods about Monterey. 



Sidalcea Hartwegi, Benth. Fields of Butte County. 



Hypericum concinnum, Benth. "Sacramento Valley," probably col- 

 lected in the Sierra foot-hills, on the excursion to Bear Valley. 



Limnanthes alba, Hartweg. Butte County. 



Limnanthes rosea, Hartweg. Upper Sacramento Valley, near junction 

 of the Yuba and Feather Rivers. 



Ceanothus proxtratus, Benth. Sierra foot-hills, higher altitudes, Finns 

 ponderosa belt; about opposite Chico. 



