1 15 



ing in the current of water in the melting snow. This little uni- 

 cellular plant had previously multiplied over the surface of the 



snow, but iii the melting of the snow the grains had been carried 

 below the surface to a depth at which the snow was still per- 

 manently hard. The surface did not show the plant at all. The 

 specimens of this plant which were collected failed to reach our 

 herbarium. The botany of this trail is far from being completely 

 known. It is a region in which the botanist of the near future 

 will find great pleasure." 



The following chronological list of plants is incomplete due 

 to lack of data or to the fragmentary nature of some of the col- 

 lections, rendering their identification impossible. 



May 15, 1866. Lewiston, Idaho. 



Phacelia linearis (Pursh) Halz. 



Erysimum asperum DC. 



Troximon cuspidatum Pursh. 



Sisymbrium Sophia L. 



Cogswellia Canbyi (Coult. & Rose) M. E. Jones. 



Collomia linearis Nutt. 



Achillea lanulosa Nutt. 

 May 17, 1866. Near Lewiston, Idaho. 



Fritillaria pudica (Pursh) Spreng. 

 May 21, 1866. Near Lapwai, Idaho. 



Geranium viscosissimum Fisch. & Mey. 



Phlox speciosa Pursh. 

 May 23, 1866. Lapwai, Idaho. 



Claytonia perfoliata Donn. 



Collinsia parviflora Dougl. 

 May 24, 1866. Near Lapwai, Idaho. 



Ptilonella scabra (Hook.) Nutt. 



Mimulus microphallus Benth. 



Camassia quamash Greene. 



Orobanche Sedi (Suksd.) Fernald. 

 May 25, 1866. Near Lapwai, Idaho. 



Viola linguaefolia Nutt. 

 May 26, 1866. Bitter Root Mountains, Idaho; lat. 46°30'. 



Mi tell a trifida Graham. 

 May 27, 1866. High prairie, 40 miles east of Lewiston. 



Mertensia oblongifolia (Nutt.) Don. 



Vioma hirsutissima (Pursh) Heller. 



Calochortus elegans Lindl. 

 May 28, 1866. West of Bitter Root Mountains, Idaho. 



Lonicera ciliatum (Muhl.) Pursh. 

 June 1, 1866. Schultz Ferry on the Clearwater, Bitter Root 



Mountains, Idaho. 



