Rydberg : Notes on Philotria Raf. 465 



Leaves 5-8 mm. long; sepals and petals I-1.5 mm. long. 



P. Ill i nor. 

 Slaminate spathe pedunclcd. 



Slaminate spathe ovoid, abruptly contracted at the base; sepals. 2. 5 mm. long; 



petals present. P. linearis. 



Staminate spatlie obovoid, tapering at the base ; sepals of the staminate (low- 

 ers 5 mm. long ; petals lacking. P. Planclionii. 



The synonymy would be as follows : 

 Philotria canadensis (Michx.) IJritton, Science II. 2 : 5. 1^95. 

 Elodea canadensis Michx. Fl. Bor.-Am. i : 20. 1803. 

 ? Anacharis Alsinastruin Babingt. Ann. & Mag. Nat. Hist. II. 



I : 85. 1848. 

 Elodea latifolia Casp. Jahib. Wiss. Bot. i : 467. 1858. 

 Philotria Nuttallii (Planch.) Rydb. [See above.] 



Serpicula verticillata Muhl. Cat. PI. Am. Sept. 84. 18 13. 



Not 5. verticillata L. f. 1781. 

 Udora canadensis Nutt. Gen. N. Am. PI. 2 : 242. 18 18. 

 Anachans Nuttallii V\2d\c\\. Ann. Sci. Nat. Bot. III. 11: 74. 

 1849. 

 Philotria angustifolia (Muhl.) Britton ; Rydb. Bull. Agr. 

 Exp. Sta. Colo. 100 : 15. 1906. 

 Serpiada verticillata angustifolia Muhl. Cat. PI. Am. Sept. 



84. 1813. 

 ? Serpiciua accident alis Pursh, PI. Am. Sept. i: 33. 18 14. 

 f Serpicida canadensis ¥.31. Man. 391. 1829. [Ed. 5.] 

 ? Apalanthe Sc/nueinitaii Planch. Ann. Sci. Nat. Bot. III. 11 : 



y6. 1849. 

 ? Elodea Sclnueinitaii Casp. Jahrb. Wiss. Bot. i : 468. 1858. 

 Philotria minor (Engelm.) Small. Fl. SE. U. S. 47. 1903. 

 Udora verticillata ? minor Engelm. ; Casp. (synonym under 

 Anacharis Nuttallii) Jahrb. Wiss. Bot. i : 465. 1858. 

 Philotria linearis Rydb. [See above.] 

 Philotria Planchonii (Casp.) Rydb. [See above.] 



Anacharis canadensis Planch. Ann. Sci. Nat. Bot. III. 11 : 



75. 1849. 

 Elodea Plancho7iii Casp. Jahrb. Wiss. Bot. i : 468. 1858. 

 New York Botanical Garden. 



