6& BULLETIN OF THE LABORATORIES 



273. COLLINSONIA L. 



559. C. Canadensis L. Rich-weed. Stone-root. 



Rich woods, somewhat common. August 10, 1889; August 21, 

 1890; September 1, 1891. 



274. Mentha Tourn. 



560. M. viridis L. Spearmint. 



Moist soil, common. July 28, 1887; July 17, 1890; August 24, 

 1891. 



561. M. piperita L. Peppermint. 



Banks of streams, common. August 27, 1887; July 1, 1891. 



562. M. sativa L. Whorled Mint. 



Moist soil, somewhat common. August it, 1888; July 15, 1889. 



563. M. Canadensis L. Wild Mint. 

 Moist soil, not common. July 9, 1890. 



275.. Lycopus Tourn. 



564. L. Virginicus L. Bugle Weed. 

 Moist soil, common. August 20, 1890. 



565. L. rubellus Moench. 



Moist soil, western part of county. September 1, 1891. 



566. L. sinuatus Ell. 



Moist soil, common. August 4, 1887; August 15, 1889; August 

 30, 1890. 



276. Pycnanthemum Michx. 



567. P. lanceolatum Pursh. 



In a field next to the depot at Alexandria, rare. August 13, 1891. 



568. P. linifolium Pursh. 



Roadside on Lover's Lane, rare. July 8, 1891. 



569. P. muticum Pers. 



Wooded, dry hillsides, rare; Toboso. August 23, 1890. 



570. P. incanum Michx. 



Wooded, dry hillsides, rare; Toboso. August 23, 1890. 



277. Melissa Tourn. 



571. M. officinalis L. Common Balm. 

 Roadsides, rather rare; Newark. July 25, 1890. 



