26 
Sagittaria sagittefolia, var. variabilis Micheli in D. C. Monog. 
an. 3: 69 (1881 
Sagittaria variabilis var. Ke Engelm. in A. Gray, 
Man. Ed. 5, 493 (1867 
Sagittaria variabilis var. pet Engelm. in A. Gray, 
Man: Ed. 5, 493 (1867). 
Sagittaria gracilis Pursh, Fl. Am. Sept. 396 (1814). 
Sagittaria variabilis var. gracilis Engelm. in A. Gray, Man. 
Ed. 5, 493 (1867). 
Sagittaria hastata Pursh, Fl. Am. Sept. 396 (1814). 
Sagittaria variabilis var. hastata Engelm. in A. Gray, Man. 
Ed. 5, 493 (1867). 
Sagittaria obtusa Willd. Sp. Pl. 4: 409 (1806). 
224. Sagittaria latifolia pubescens (Muhl.) J. G. Smith. 
gittaria pubescens Muhl. Cat. 86 (1813). 
225. Sagittaria longiloba Engelm. in Torr. Bot. Mex. Bound. Surv. 
212 (1858) 
226.' Sagittaria longirostra (Micheli) J. G. Smith. 
Sagittaria sagittefolia, var. is longirostra Micheli in D. C. 
Monog. Phan. 3: 69 (188 
227. Sagittaria rigida Pursh, FI. Dier Se ept. 397 (1814). 
Sagittaria heterophylla Pursh, Fl. Am. Sept. 396 (1814), not 
hreb. 
Sagittaria heterophylla, var. angustifolia, Engelm. in A. Gray, 
Man. Ed. 5, 494 (1867). 
Sagittaria heterophylla, var. elliptica, Engelm. in A. Gray, 
Man. Ed. 5, 494 (1867). 
228. Sagittaria subulata (L.) Buchenau, Abh. Nat. Ver. Bremen, 2: 
490 (1871). 
Alisma subulata L. Sp. Pl. 343 (1753). 
Sagittaria pusilla Nutt. Gen. 2: .213 (1818). 
Sagittaria natans, var. lorata A. Gray, Man. Ed. 6, 555 
(1890), not Chapin. 
229." Sagittaria subulata gracillima (S. Wats.) J. G. Smith. 
gittaria natans, var. (2) gracillima S. Wats. in A. Gray, 
Man. Ed. 6, 556 (1890). 
230. Sagittaria teres S. Wats. in A. Gray, Man. Ed. 6, 555. (1896): 
