337] FLORA OF COLUMBIA AND VICINITY 1 95 



311. PHARBITIS Choisy {IPOMOEA L.]. 



Morning-glory. 



745. P. hispida Choisy [/•. purpurea {\^.)Yo\g):\i: 1. pur- 

 purea (L.) Roth]. Common morning-glory. 



Cornfields, yards and waste places; common. 

 Tropical America, thence to North America. 



746. P. Nil (L.) Choisy [/". hcderacea (L.) Choisy: /. he. 

 dcracea Jacq.]. Ivy-leaved morning-glory. 



Cornfields and waste places; common. 



Tropical America, thence to the United States. 



312. OALYSTEGIA R. Br. ^CONVOLVULUS 



L.]. Bindweed. 



747. C. Americana (Sims) Daniels \Co7ivohniltis sepium 

 Amcricanus Sims: Co?ivolvulus Americanus (Sims) 

 Greene]. American hedge bindweed. 



Fields, waste places and swamps; infrequent. 



Nova Scotia to Montana; North Carolina to Utah. 



313. OUSCUTA L. Dodder. 



74S. O. Polygonorum Engelm. {C.chlorocarpaY.n^ftXm^ 

 Smartweed dodder. 



Low grounds, principally on Polygonum and Bidens; the 

 commonest local dodder. 



Pennsylvania to Minnesota; Delaware to Arkansas. 



749. O. tenuiflora Engelm. [6". Cephala?ithi Engelm.]. 

 Button bush dodder. 



Swales; on tall herbs and shrubs. 



Pennsylvania to Michigan and the Northwest Terri- 

 tory; Texas to Arizona. 



750. C. Qronovii Willd. Love-vine. 



Low grounds and swales; common on Mentha and other 

 herbs. 



Nova Scotia to Manitoba; Florida to Texas. 



