105 
PONTEDERIACEZE.* 
I. PONTEDERIA L. Sp. Pl. 288 (1753). 
1048. Pontederia cordata L. Sp. Pl. 288 (1753). 
1049. Pontederia cordata lancifolia (Muhl.) Morong. 
1050. 
1051. 
1052. 
1053. 
1054. 
1055. 
Umsema obtusifolia and U. mucrona'a Raf. Med. Rep. (IL) 5: 
352 (1808), names only. 
Pontederia lancifolia Muhl. Cat. 34 (1813). 
Pontederia angustifolia Pursh, Fl. Am. Sept. 224 (1814). 
P. cordata var. angustifolia Torr. Fl. N. U.S. 1: 343 (1824). 
2. HETERANTHERA R. & P. Prodr. Fl. Per. 9 (1794). 
[SCHOLLERA Schreb. Gen. 785 (1789), not Roth (1788).] 
Heteranthera dubia (Jacq.) Morong. 
Commelina dubia Jacq. Obs. Bot. 3: 9, 7. 59 (17 : 
Schollera graminifolia Willd. Neue Schrift. Ges. i Fr. Berl. 
3: 438 (1801), name only. 
Leptanthus gramineus Michx. Fl. Bor. Am. 1: 25 (1803). 
Heteranthera graminea Vahl, Enum. 2: 45 (1806). 
Schollera graminea A, Gray, Man. 511 (1848) 
Heteranthera limosa (Sw.) Willd. Neue Schrift. Ges. Nat. 
Fr. Berlin, 3: 439 (1801). 
Pontederia limosa Sw. Prodr. 57 (1758). 
Leptanthus ovalis Michx. Fl. Bor. Am. 1: 25 (1803). 
Heteranthera reniformis R. & P. Fl. Per. 1: 43 (1798). 
Leptanthus reniformis Michx. Fl. Bor. Am. 1: 25 (1803). 
JUNCACEZ. + 
1. JUNCUS L. Sp. Pl. 325 (1753). 
Juncus acuminatus Michx. Fl. Bor. Am. 1: 192 (1803). 
Juncus acuminatus var. legitimus Engelm. Trans. St. Louis 
Acad. 2: 463 
(1868). 
Juncus acuminatus debilis (A. Gray) Engelm. Trans. St. 
Louis Acad. 2: 463 (1868). 
Juncus debilis A. Gray, Man. Ed. 2, 481 (1856). 
Juncus acuminatus robustus Engelm. Trans. St. Louis Acad. 
2: 463 (1868). 
* Contributed by Dr. Thomas Morong, 
+ Contributed by Mr. Frederick V. Coville. 
Mem, Torr. Bor. CLUB, Vol. 5, Sig. 8, March 25, 1894. 
