108 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Provancher, ABBE L. Flore Canadienne. 1862. 
_On p, 28 the new name Nuphar americanum published. 
Pursh, Freperick. Flora Americae septentrionalis 2: 369-70. 1814. 
Four species recognized under Nuphar and a new combination made. 
Rafinesque-Schmaltz, C.S. New flora and botany of North America 2: 17. 1836, 
The genus Ropalon published. 
Robertson, CHARLES, Flowers and insects. Bot. Gaz. 14: 120-126. 1889, 
On p. 122 an extended discussion of Nuphar advena., 
Robinson, B. L. In A. Gray, Syn. Fl. 1: 77-79. 1895. 
The genus Nuphar with four species and three subspecies recognized, 
Salisbury, R. A. Descriptions of the natural order of Nymphaeeae. Ann. Bot. 2: 
69-76. 1806. 
The new name Nymphaea arifolia published. 
Schuster, Jutrus. Zur Systematik von Castalia und Nymphaea. Bull. Herb. 
Boiss. 7: 853-868, 901-916, 981-996. 1907. 8: 65-74, pl. 1. 1907. 
An exhaustive account of the European Nymphaeas with references to American ones. 
Sibthorp, Jon. Florae Graecae prodromus 1: 361, 1808. 
Publication of the generic name Nuphar. 
Small, J. K. Studies in the botany of the southeastern United States. V. Bull. 
Torrey Club 28: 125-130. 1896. 
Describes Nymphaea orbiculata. 
Studies in the botany of the southeastern United States. XIV. Bull. 
Torrey Club 25: 465-484. 1898. 
Describes Nymphaea macrophylla, 
Torrey, JoHN. Flora of the State of New York. Nat. Hist. N. Y. pt. 2. 1: 39-40, 
1843. 
Three species of Nuphar recognized. 
and Gray, Asa. Flora of North America 1: 57-8. 1838. 
Three species and two subspecies recognized under Nuphar, one subspecies new. 
Walter, THomas. FI. Carol. 154-155. 1798. 
Recognizes two species of Nymphaea of the section Nuphar. 
