436 IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



Riutnex acetosella L. Sheep sorrel. A very common weed. 



Riimex con finis Greene. Collected along the roadside at Ju- 

 neau. 



Rumex crispus L. Sparingly introduced as a weed at Sitka. 



Rumex mexicanus Meisn. Moderately frequent at Juneau. 



Rumex salici/olius Weinm. Moderately frequent at Sitka. Al- 

 though, the specimens gathered differ somewhat in appearance 

 this may be the preceding species. 



Rumex ohtusifolins L. Rather sparingly introduced as a weed 

 at Sitka. 



Rum^ex occidentaUs Wats. Fairly common near the seashore. 



Polygonum convolvulus L. {Tiniaria convolvulus (L.) "Webb 

 Moq.) {Bilderdykia convolvidiis (L.) Dum.). An introduced 

 weed. 



Polygonum islwndioum Meisn. {P. litorale sitchense Small). ? 

 Common along and near the beach. 



Polygonimi peniisylvanicum L. {Persicaria pennsylvanica (L.) 

 Small). Introduced at Sitka. 



Polygonum, sp. Introduced at Juneau. 



Polygonum, viviparumli. {Bistorta vivipara (L.) S. F. Gray). 

 An abundant and variable species found along the beaches and 

 in the swamps. 



CHENOPODIACE^. 



Atriplex alaskensis S. Wats. A large species found at Sitka. 



Atriplex gmelini C. A. Mey. Common on and near the beach. 



Chenopodium album L. Lamb's quarters. An introduced 

 weed but not troublesome. 



AMARANTHACE^. 

 Amarmithus reiroflexus L. Pigweed. An infrequent weed at 

 Sitka. 



PORTULACE^. 



Clayto)iia sibirica h. {Montia sihirica (L.) Howell). {Linnia 

 sihirica (L.) Haw.) A very common plant. 



Claytoma asarifolia Bong. Sitka is the type locality for this 

 species. 



Montia. fontana L. A small plant common in wet soil or run- 

 ning water. 



ALSINACE^. 



Silene acaulis L. Moss campion. Moderately abundant around 

 Juneau. 



