26 Rhodora [February 



plant measures 6 mm. if well developed. In both plants the involucre 

 is usually of five obtuse bracts, but in case the number is not five, 

 variation occurs in opposite directions. Occasionally the southern 

 plant has four bracts, and the northern plant six. This same varia- 

 tion is found in the number of fertile flowers, which are five or four 

 in the southern plant and five or six in the northern. Achenes of the 

 southern plant vary from 2 to 2.4 mm. in length, with an average of 

 2.1 mm. Those of the northern ])lant vary from 3 to 3.3 mm., with 

 an average of 3.1 mm. Strange to say, the plants which seem most 

 intermediate between typical extremes are those from Texas, at the 

 southern limit of range. 



There can be little doubt that the name 7m frufescens Ty. must be 

 applied to the plant of the Southeastern States. The description 

 of the "Species Plantarum" includes a plant from Peru, which is 

 probably some other species. The northeastern plant is here pro- 

 posed as new. 



Iva oraria sp. nov., fruticosa 0.5-1 m. altitudine; caulibus solum 

 superiore parte ramosis, plus minusve subscabris; foliis plerumque 

 opposhis, ovatis, obtusis vel acutis, profunde scrratis; capitulis axil- 

 laribus deflexis pedicellatis dcpresso-globosis ; involucro penta])hvllo 

 vel raro hexaphyllo, ad maturitatem (J mm. diametro; floribus ferti- 

 libus 5 aut raro G; fructu 3-3.3 mm. longitudine. — Salt marshes, 

 New Hampshire to New Jersey. Differs from /. jruteficem in the 

 larger size of the fruit, the greater diameter of the involucre, and the 

 much broader leaves. Type, Bartlett 354 (Hb. Bartlett), collected 

 on the banks of the Charles River, Boston, Massachusetts, 18 Sep- 

 tember, 1905. 



Specimens examined: 



Zw oraWa; — IMassachusetts : Boston, Bartlett 35 Jf and 4OS; 

 Boston, Aug. 19, 1853, Wm. Boott; Newbury, Aug. 7, 1899, Wil- 

 liams; Ipswich, Oakes. Rhode Island: Tiverton, Grccnman 17()6. 

 Connecticut: East Haven, 1886 A. L. Winton; Orange, Andrews 

 90. New Jersey: 1832, Asa Gray. 



Iva frutescens L.:— North Carolina: Southport, Bilt more Herba- 

 rium 2586a. Florida : Titusville, Nash 2287; Mouth of St. John's, 

 Palmer 270; Apalachicola, Bilfmore Herbarium 2585b; Lee County, 

 Hitchcock 153; Duval Co., Ciirtiss 1396; St. Augustine, Curtiss 

 6J,57. Mississippi: Biloxi, Pollard 1183. Texas: Galveston Id., 

 Traci/ 7716; :Moutli of the Brazos, Aug. 1843, Lindheimer. 



Gray Herbarium. 



