X. data. 



21 6 XYRIDACEAE 



XYRIDACEAE 

 I. Xyris L. 



Lateral sepals as long as the bracts or shorter, usually concealed. 



Lateral sepals ciliate, prominently fringed tipped. I. X. flexuosa. 



Lateral sepals not ciliate, but erose or laciniate, not fringed 

 tipped. 

 Heads oblong or nearly cylindric; bracts numerous, in 



many series. 

 Heads ovoid; bracts relatively few and in few series. 

 Sepals laciniate only near the apex (rarelyentire). 

 Sepals laciniate at least half their length. 

 Lateral sepals longer than the bracts. 

 Sepal tips not conspicuously fringed. 

 Sepal tips conspicuously fringed. 



Scapes not conspicuously bulbous thickened at the base; 



leaves not spirally twisted. 

 Scapes conspicuously bulbous thickened at the base; 

 leaves spirally twisted. 



i. X. flexuosa Muhl. In bogs: Me. to Minn., Ga., Mo. and Tex. 



Conn. Throughout but not common, decreasing southeastward. 

 N. Y. L. I. and S. I. decreasing and perhaps wanting northward. 

 N. J. Not recorded from Passaic, Sussex, Warren and Hunterdon 



counties, increasing and common southward. 

 Pa. Lehigh, Montgomery, Berks and Delaware counties. 



Tertiary common: Cretaceous, less common: Older Formations 

 scattered. Predominating south of the moraine. 153-220 days. 

 Sea level-860 ft. 



2. X. elata Chapm. In sandy swamps near the coast: N. J. to 



Fla. and La. 



N. J. Bennett, Cape May Co. 



3. X. montana H. Ries. In bogs: N. S. to Ont., Mich, and Pa. 



Known definitely only from Tannersville and Tobyhanna, Monroe 

 Co., Pa. Both places are in the region of Pocono and Catskill Red 

 sandstones, on or very near the terminal moraine, have an elevation 

 of 1,200-1,933 ft- and a growing season of 118 days. Reported also 

 from Woodbury, Conn. 



4. X. caroliniana Walt. In swamps and bogs: Me. and Mass. 



to Pa., Fla. and La., mostly near the coast. 

 Conn. Local in most of the state, decreasing northward. 

 N. Y. L. I. and S. I. 



N. J. Middlesex, Monmouth and Ocean counties, increasing 

 southward. 



