2 Ne ere} oi ee a 
POLS SPOR Rt dak MRE gy ace 
SCIENTIFIC PAPERS. 
A REVISION OF THE NORTH AMERICAN SPECIES OF SAGITTARIA 
AND LOPHOTOCARPUS. 
BY JARED G. SMITH. 
The principal published revisions of the Alismaceae are 
those of Engelmann,* Buchenau,f and Micheli.t The 
present revision has been based on a study of the material 
contained in the Engelmann and general herbaria of the 
Botanical Garden, and in the herbaria of the Shaw School 
of Botany, Harvard University, the United States Depart- 
ment of Agriculture, Columbia College, the University of 
Nebraska, Kansas Agricultural College, the University of 
Minnesota, and in the private herbaria of Mr. Walter 
Deane, Dr. Charles Mohr, Mr. P. A. Rydberg, and Mr. 
Henry Eggert. My cordial thanks are also tendered to 
the many correspondents who have contributed specimens to 
the Garden Herbarium. I have been especially aided in this 
work by and amlargely indebted to the many and copious 
manuscript notes and drawings made by Dr. George Engel- 
mann during his life-long study of these genera. Not only 
* Dr. George Engelmann, in A. Gray, Man. (1848); Ed. 2 (1856); 
Ed. 5 (1867). For complete references see The Botanical Works of 
George Engelmann, Collected for Henry Shaw, 496 (1887). 
+ Franz Buchenau, Index Criticus Butomacearum, Alismacearum 
Juncaginacearumque hujusque descriptarum, in Abh. Nat. Ver. Bremen 
(1868).— Nachtraege zu den kritischen Zusammenstellungen der bis jetzt 
beschriebenen Butomaceen, Alismaceen und Juncaginaceen, Bremen, 
(1871).— Beitraege zur Kenntniss der Butomaceen, Alismaceen und Jun- 
caginaceen, in Engler, Bot. Jahrb. 2: Heft 5 (1882).—In Engler und 
Prantl, Die Natiirlichen Pflanzenfamilien 2: 1, 227 (1889). 
¢ Marc Micheli, in DC. Monog. Phan. 3:29 (1881). 
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