221 



29- * Arrhenatherum elatius (L.) Beauw Common in flr\- 

 fields and on roadsides, and spreading rapidly. 



30. * Aira caryophyllea L. Abundant everywhere in dr>^ or 



rocky sterile soil. 



31. * Aira praecox L. Common in a tract of waste ground east 



of the S. P. station at Salem, but not observed elsewhere. 



32. * Aira capillaris Host. On sandbars in the Xorth Santiam 



River at Xorth Santiam Station, and also in flower-beds 

 on the campus of Willamette University at Salem (X). 



33. Danthonia californica Boland. In open meadows, scarce 



in our limits, but becoming more common southward. 



34. Dantho7iia americana Scribn. Very common in dry 



meadows. 



35. * Avena fatua L. Introduced along railroad-tracks and 



in waste places (X). 



36. * Avena fatua L. var. glabrata Peterm. With the last, but 



more common. 



37. * Avena barbata Brot. Frequent along the S. P. tracks 



south of Salem — probably a recent introduction (X). 



38. * Avena saliva L. A ^■ery common escape along railroad 



tracks and in waste places. 



39. Deschampsia caespitosa (L.) Beauv. A ven.- handsome and 



variable grass, common in low ground, especially in 

 roadside ditches. 



40. Deschampsia danthonioides (Trin.) Munro. Common on 



sand-bars and in dried-up pools along roadsides. 



41. Deschampsia elongata (Hook.) Munro. Common on the 



borders of woods and in roadside ditches. 



42. TriseUim cernuum Trin. Infrequent in low woods. 



43. Trisetiim canescens Buckl. Occasional in dr>^ open wood- 



lands. 



44. *Gynerium argenteum X'ees. Although this shows no 



disposition to spread, it has persisted for years in vacant 

 lots where dwellings once stood (X). 



45. Eragrostis hypnoides (Lam.) BSP. Very common on muddy 



shores of the Willamette River. 



46. * Cynosurus cristatiis L. Occasional on lawns and street- 



parking about Salem. 



