33l] FLORA OF COLUMBIA AND VICINITY 1S9 



709. O. florida L. \Cynoxylo7i floridum (L.) Raf.]. Flow- 

 ering DOGWOOD. 



Very rare in oak woods and on rocky banks. 

 Massachusetts to Ontario and Minnesota; Florida to 

 Texas and Mexico. 



Series 2. SYMPETALAE. 



Order 31. ERICALES. 



Family 81. PIROLACEAE Agardh. Shin-leaf family. 



292. MONOTROPA L. Corpse-plant. 



710. M. uniflora L. Indian pipe. 



Rare in rich oak woods: saprophytic on leaf mould. 

 Anticosti to British Columbia; Florida to California 

 and Mexico: Eastern Asia. 



Family 82. ERliCACEAE DC. Heath family. 



293. VACOINIUM L. Blueberry. 



711. V. vacillans Kalm. Low blueberry. 



High cliffs of Grindstone creek; a restricted patch south 

 of the stream, also a few scattered bushes on the bluff on 

 the opposite side. 



Maine to Ontario and Michigan; Georgia to Missouri. 



Order 32. PRIMULALES, 

 Family 83. PRIMULACEAE Vent. Primrose family. 



294. ANDROSAOE L. 



712. A. occidentalis Pursh. Rock primrose. 

 Summits of cliffs; local. 



Michigan to the Northwest Territory; Arkansas to 

 Utah and New Mexico. 



