4IO Muhlenbergia, Volume 2 



Trifolium CIUOLATUm Rentli. i. Fring-ed clover. In 

 moist grassy places, Willamelte falls. May to July. Purple and 

 white. 



X Trifolium aurkum Poll. i. Hop clover. Not uncom- 

 mon in fields and waste places around the city. Naturalized from 

 Europe. April to September. Yellow, becoming brown in age. 



Trifolium procumbens L. i. Low hop clover. Common 

 in fields, lawns and road^ide.«, L. & C. fair grounds, East Port- 

 land, Mt. Tabor, etc. Naturalized from Europe. May to Sep- 

 tember, Yellow. 



Trifolium fimbriatum Lindl i. Beach clover. In grassy 

 glades about Oswego. May to August. Purple or reddish. 



Trifolium tridentatum Lindl. i. Three-toollied clover. 

 Infrequent in open places, Fulton, Oswego, etc. A variable spe- 

 cies. May to August. Purple and white. 



Trifolium variegatum Nult. i. White tip clover. lu- 

 •frequent in wet rocky places, Oswego, Risley station, etc. May 

 to August. Purple with white tips. 



Trifolium microcephalum Pursh. i. Smallhead clover. 

 Fields, roadsides and wet places, Milwaukie, Risley station, etc. 

 April to June. Pale pink. 



Trifolium microdon H. & A. i. Cup clover. Hillsides, 

 railroad tracks and waste places. Lower Albina, etc. Native of 

 western Oregon but may be introduced here. April to June. 

 Rose color to light pink. 



HosACKiA Dougl. Bird foot trefoil. 

 HosACKiA AMERICANA (Nutt.) Piper. I. Bird foot trefoil 

 {Lotus americamts.) Rocky places, sand bars and sandy soil 

 along Willamette river. In pioneer days and even later this 

 plant was frequently used to make hay. June to October. Sal- 

 mon color to pink or whitish. 



HOSACKIA PARVI FLORA Benth. I. Small flowered Hosackia. 

 {Lotus micranthus}) Infrequent in open places, Oswego, Mil- 

 waukie, etc. May, June. Pale salmon turning reddish, minute. 



HosACKiA DECUMBENS Beuth. 4. Yellow shoe strings. 



