16 



Two factors combine to make this possible. First, the 

 perennating bulbils referred to above; second, the seepage 

 springs which line the short deeply shaded creek. \\'ater 

 perennially oozes out from the lower silurian sandrock on 

 a level with the creek, keeping wet the carbonaceous mud 

 forming from the decaying vegetation; but the key to the 

 persistence of the plant is, that it is a strong hydrophyte. 

 In its isolated station it seems to have long forgotten to produce 

 seed since I have looked many times for ripe seeds, but have 

 never found them. The reliance in this patch is entirely on the 

 bulbils. 



Winona, Minnesota 



Note on the Occurrence of Oxypolis filiformis in the Bahamas 



L. J. K. Brace 



On a recent trip to the swamps that abound and form such 

 a large part of New Providence I observed a white-flowered 

 plant in both scattered and group state among the dwarfed 

 plants of Mariscus jamaicensis (Crantz) Britton [Cladium 

 jamaicense Crantz] in the swamps' margins. 



This proved to be DeCandolle's Tiedemamiia teretifolia,^ 

 which had not been gathered in by the various collecting 

 parties observing for the "Bahama Flora." What makes 

 it more interesting is the fact, as Dr. Britton has informed 

 me, a distinct species has turned up in Cuba.^ 



This raises the question whether this latter plant may 

 not also be found in these islands, presumably in the southern 

 portion of the archipelago. Time alone can show this. It 

 seems a pity more interest is not shown in the biology of these 



1 The synonymy is: — Oxypolis filiformis (Walt.) Britton, Mem. Torr. 

 Club 5: 239. 1894. Oenanthe filiformis Walt. Fl. Car. 113. 1788. Oenanthe 

 teretifolia Muhl. Cat. 31. 1813. Tiedemayinia terelifolia DC. Mem. Omb. 

 51. pi. 12. 1829. 



On the continent this species ranges from southern \'irginia to Florida 

 and westward to Louisiana. N. L. B. 



2 Oxypolis Bakeri (Wolff), Britton & Wilson. Tiedematmia Bakeri, 

 Wolff, in Urban, Symb. Ant. 5: 452. 1908. 



This closely resembles O. filiformis but has larger longer fruit. It is 

 known only from marshes on the southern coasts of Havana and Santa 

 Clara Provinces. N- L. B. 



