56 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Shrubs, 
Berberis nervosa. Near Farmington. 
Cornus occidentalis. Near Spokane, Wash. 
Corylus californica. Near Kettle Falls, Wash. 
Hehinopanax horridum. 
Gaultheria ovatifolia. Priest Lake. 
Rubus macropetalus. 
Rubus spectabilis. Priest Lake, very rare, 
Herbs. 
Antennaria howellii. Cedar Mountain. Spangle, Wash. 
Claytonia parvifolia. Priest Lake; Packsaddle Peak. 
Collinsia grandiflora. Troy. 
Collomia heterophylla. Wiessner Peak. 
Corallorhiza striata. Cedar Mountain. 
Erigeron speciosus. 
Fritillaria lanceolata. Farmington Landing. Palouse City, Wash. 
Heuchera cylindrica. Near Lewiston. 
Hosackia bicolor. 
Howellia aquatilis. Lake Tesemini. 
Lilium parviflorum. Wake Pend Oreille. 
Maianthemum bifolium kamtschaticum. Priest Lake. 
Micrampelis oregana. Umatilla River, Oreg. Kettle Falls, Wash. 
Mitella caulescens. Farmington Landing. 
Polygonum bistortoides. Near Moscow. 
Polystichum munitum, Cedar Mountain. Also in Blue Mountains. 
Psoralea physodes. One station near ‘Troy. 
Saxifraga oregana. Priest Lake. 
Stenanthium occidentale. Priest Lake. 
Trientalis latifolia. Wiessner Peak. Blue Mountains, Wash. 
Vaccinium ovalifolium. Priest Lake. 
In this connection the fact may also be pointed out that in several 
cases the species of the coast region are replaced in Idaho by very 
close allies. This fact is illustrated by the following pairs: 
Coast region of Washington: Northern Idaho: 
Alnus oregana. Alnus tenuifolia. 
Philadelphus gordonianus. Philadelphus lewisii. 
Potentilla gracilis. Potentilla blaschkeana. 
Ranunculus orthorhynchus. Ranunculus platyphyllus. 
Ribes divaricatum. Ribes irriguum. 
Salix lasiandra. Salix lancifolia. 
Sambucus callicarpa. Sambucus melanocarpa. 
Spiraea douglasii. Spiraea menziesii. 
Viola sempervirens. Viola orbiculata, 
Perhaps the most significant of the above lists is that of the species 
which are now so rare in Idaho, but abundant in western Washington. 
These species must be either relatively newcomers, just obtaining a 
foothold, or else old inhabitants, now on the verge of extinction, so 
far as this immediate region is concerned. The latter hypothesis 
