IOS CALLA PALUSTRIS. BOG-ARUM. 



ing the roots, afterwards boiling and macerating them till they 

 are deprived of their acrimony, when they are baked like other 

 farinaceous substances. It is called misscbrevdiw Lapland. The 

 plant has the reputation of being a very active diaphoretic." 



Besides in Lapland, it is also reported as being very abundant 

 in Norway and Sweden, Holland, Germany, and Russia, to 

 Siberia. In our own country, Dr. Gray records it as being 

 found in "cold bogs, -New England to Pennsylvania, Wisconsin, 

 and common northwards " ; and Prof. Wood, as " in shallow 

 waters, Pennsylvania to New England, Wisconsin and British 

 America." Prof. Porter records it as being gathered by him in 

 Northwestern New Jersey. The " Bulletin of the Torrey Botani- 

 cal Club," of New York', gives, as special locations, " New Dur- 

 ham Swamp," and " Orange County, New York." It seems 

 rather common in Wisconsin, and was found in the northern 

 part of the State of Ohio by Mr. Beardslee. All the leading 

 authors seem to make Pennsylvania its southern limit, but it is 

 included in old lists of the flora of the District of Columbia, 

 though not in the catalogue of the modern " Potomac Naturalists' 

 Field Club." It has not been the writer's privilege to find it wild 

 anywhere himself, and the specimen from which the accompany- 

 ing drawing was made was gathered in the neighborhood of 

 Boston by Mr. Jackson Dawson. 



The specific name palustris is, of course, in reference to the 

 marshy places in which the plant grows. Its common name in 

 England, according to Mr. Robinson, is " Bog- Arum." Dr. Gray 

 gives the common name in New England as " Water-Arum." 

 As we have to choose between the two, and Mr. Robinson says 

 it grows better in wet land than in water, we have placed " Bog- 

 Arum " at the head of our description. 



Explanation of the Plate. — i. Rhizome and complete plant. — 2. Scape, with fruit 

 approaching maturity. — 3. Single flower, with stamens ami ovary magnified. — 4. Cross 

 section oi the ovary, showing portion of the ovules. 



