Virginia Institute of Marine Science
Virginia Journal of Science
Hoyt (1917-1918), in his excellent work on the marine algae of Beaufort, North Carolina, pointed out that this area is a transitional one between northern and southern algal floras of the Atlantic coast of the United States. Of the 84 genera he reported for the Beaufort area, 24 genera and 46 species reached their northern known limit there, while 4 genera and 9 species reached their southern known limit at Beaufort. Subsequent publications by others have added considerably to the numbers of both groups.
Humm, Harold J., Dictyota dichotoma in Virginia (1963). Virginia Journal of Science, 14(3), 109-111.