MOUNT RAINIER 



Polygonum minimum Watson. 



Common at 5,000 to 6,000 feet altitude. 



Polygonum douglasii Greene. 



On a gravelly slope near the foot of Cowlitz Glacier. 



Polygonum newberryi Small. 



Common in the pumice fields, where it is a characteristic plant. 



Polygonum bistortoides Pursh. 



Very plentiful on the grassy slopes, where it is conspicuous by 

 its dense white-flowered spikes an inch long, borne singly on slender 

 stems a foot or two high. 



Eriogonum compositum Douglas. 



A form of this variable species occurs on the talus at the foot of 

 the cliffs on the north side of Cowlitz Glacier. 



Eriogonum pyrolaefolium coryphaeum Torrey & Gray. 



Plentiful in the pumice fields. 



BETULACEAE. (Birch Family.) 



Alnus sinuata (Regel) Rydberg. 



Sitka alder. A small alder, seldom over ten or twelve feet high. 

 Common along the streams at low altitude. 



SALICACEAE. (Willow Family.) 



Salix scouleriana Barratt. 



The common upland willow; not rare up to 3,500 feet elevation. 



Salix sitchensis Sanson. 



The " silky willow " is plentiful along the Nisqually at Long- 

 mire Springs. 



Salix barclayi Anderson. 



Salix commutata Bebb. 



These two willows make thickets along the rills at about 6,000 

 feet altitude. The leaves in the former are smooth above and 

 glaucous beneath ; in the latter pubescent on both sides. 



Salix nivalis Hooker. 



A very dwarf willow, with obtuse leaves, growing only a few 

 inches high. Found on the north side of the mountain by Flett. 



Salix saximontana Rydberg. 



Very similar to Salix nivalis, but larger in every way. Also 

 found by Flett on the north side of the mountain. 



Salix cascadensis Cockerell. 



(S. tenera Andersson.) 



A very dwarf rare willow with leaves acute at each end. North 

 slope of the mountain, collected by Flett. 



Populus trichocarpa Torrey & Gray. 



The cottonwood occurs along the Nisqually to some distance 

 above Longmire Springs. 



278 



