5l6 CUSCUTACEAE 



Corolla scales fringed; stigmas capitate; capsule indehiscent. 

 Sepals united below into a gamosepalous calyx. 



Flowers very nearly sessile; corolla persistent at the base 

 of the capsule. 

 Corolla scales ovate, fringed all around. 

 Corolla scales abortive, or of a few processes. 

 Flowers distinctly pedicelled; corolla enclosing or capping 

 the capsules. 

 Tips of the corolla lobes incurved. 

 Corolla lobes spreading or recurved. 



Scales small, irregularly fringed; capsule de- 

 pressed globose. 

 Scales long, fringed mainly above; capsule 

 pointed. 

 Sepals separate, subtended by similar bracts. 



i. C. Epilinum Weihe. On flax: N. S. to N. J. and Pa. Intro- 

 duced from Europe. 

 Very rare in our area, and not recently collected. 



2. C. Epithymum Murr. Usually on clover: Me. and Ont. to 



Conn., N. Y., Pa. and S. Dak. Introduced from Europe. 

 Rare in our area as an adventive, usually not persistent. 



3. C. arvensis Beyrich. On various herbs and low shrubs: Mass. 



to the N. W. Terr., Fla., Tex., Mex. and Calif. 



Throughout, the range, nowhere common, and often locally 

 wanting. 



4. C. Polygonorum Engelm. On Polygonum and other herbs: 



Pa. and Del., also westward. 



Confined in our area to Luzerne Co., Pa.; not recently collected. 



5. C. Coryli Engelm. On hazels and other shrubs and on herbs: 



Conn, to Va., S. Dak. and Ark. 



Known definitely, in our area, only from Norwich, Conn. 



6. C. Cephalanthi Englem. On shrubs and tall herbs: Pa. to 



Minn., the N. W. Terr., Tex. and Ariz. 



Known only from Quaker Bridge, Tom's River and Swedesboro, 

 all in or near the pine-barrens of N. J., and from Northampton Co., 

 Pa. 



7. C. Gronovii Willd. On herbs and low shrubs: N. S. to Man., 



Fla. and Tex. 



Common throughout our area except in the pine-barrens, there 

 not recorded; always increasing northward. 



