388 Muhlenbergia, Volume 2 



Coimnon in fields and roadsides aroiiiid Portland. Naturalized 

 from Europe. April to July. White. 



Arenaria serpvlufoi.ia tknuior Koch. I. Small flow- 

 ered sandwort. In fields, road.sides and waste places about the 

 city. Naturalized from Europe. April to July. White. 



Alsine L. Chickweed. 



Alsine media L. I. Chickweed. Very common weed in 

 fields, orardens, lawns and waste places about the city. Blooms 

 early (about Febiuary ist) and continues all summer. Natural- 

 ized from Europe. White. 



Alsine NiTENS (Nntt.) Greene, i. Slender starwort. Moist 

 ground, Swan island and Ross island. April to July. White. 



Alsine i.ONGiFOLiA(Muhl.) Britton. i. Long leaved stitch- 

 wort. In moist placej about 0.swego. April to July. White. 



Alsine BOREALiS (Bigel.) Britton. 4. Northern chickweed. 

 Low ground and bottom lands, Columbia and Willamette rivers 

 near Portland. May to July. White. 



Alsine crispa (C. & S.) Holzinger. 4. Crisp leaved chick- 

 weed. Rare in moist rich woods about the city. May to July. 

 White. 



X Alsine aquatica (L.) Britton. 4. Water chickweed. 

 Infrequent in wet ground and waste places, Lower Albina. Ad- 

 ventive from Europe. April to July. White. 



Cerastium L. Mouse-ear chickweed. 



Cerastium viscosum L. I. Mouse ear cliickweed. Com- 

 mon in gardens and cultivated ground. Naturalized from Eu- 

 rope. March to July. White. 



Cerastium vulgatum L. 4. Large mouse-ear chickweed. 

 Common on roadsides and waste places. Naturalized from Eu- 

 rope. April to August. White. 



Cerastium arvense L. 4. Field chickweed. Infrequent 

 in low ground and waste places. April to August. White. 



Cerastium arvense angustifolium Fenzl. 4. Narrow 

 leaved chickweed. On rocky slopes, Elk Rock. April to Au- 

 gust. White. 



