123 



Fl. Bor. Am. 1: 87. L803), which has seed s 0.4 0.65 mm. long, 

 varying from brown to whitish. 



Limosella SUB1 LATA Ives (cf. Fassett, I.e., p. 105). This 



diminutive species of the Scrophulariaceae is more tolerant of 

 saline conditions than the other estuarine species found at 

 Rocky Creek, where it was associated sparingly (no. 6442) with 

 Isoetes ri par ia and Eriocaulon Parker i. It is known from several 

 stations on Long Island and has been previously recorded from 

 as far north as Peekskill on the Hudson River (House, N. Y. 

 State Mus. Bull. 254: 623. 1924). 



Hemia nthus micranthus (Pursh) Pennell {Micranthemum 

 micranthemoides (Nutt.) Wettst. Known previously only from 

 the tidal flats of the lower Delaware River and southward, 

 occupying with Ileteranthera reniformis the tiny pools left by 

 the receding tide (no. 6109). On our second visit only frag- 

 mentary material was observed, and it was obvious that the 

 plants had suffered severely from frost. 



Ily santhes dubia (L.) Barnhart var. i nund ata Pennell, 

 Torreya 19 : 149. 1919. No specimens of Ilysanthes were collected 

 at Stony Creek, but the plants of the submerged shores are un- 

 doubtedly the same as material obtained at Coeymans (Svenson 

 no. 5495) on the opposite shore of the Hudson River. The 

 variety has previously been known from the Passaic River to the 

 Potomac River, and is cleistogamous (Pennell, Bartonia 8: 10. 

 1924). In no. 5495 the corollas are rudimentary, not exceeding 

 2 mm., whereas in typical /. dubia they are 5-10 mm. long. 



Bidens hyperborea Greene. This estuarine species, com- 

 posed of several geographic variants, extends southward from 

 Hudson Bay to northeastern Massachusetts, and according to 

 Fassett (I.e. p. 104) is known from a single collection (1827) 

 from the Hackensack marshes of New Jersey. This is the first 

 occurrence in New York State. At Rocky Creek, B. hyperborea 

 was accompanied by B. laevis, B. frondosa var. anomala, B. 

 bidentoides and B. Eatoni var. major, all of which are common 

 on tidal shores of the Hudson River from Albany to Peekskill. 

 Both E. connata and E. Eatoni var. major are represented in the 

 numerous collections which I have made over a period of years 

 from the Hudson estuary, by forms with downward, upward, 

 and intermediately barbed achenes. 



