236 Bulletin 187 



NYMPHOIDES. (LIMNANTHEMUM). Floating Heart 



N. lacunosum (Vent.) Feruald. Shallow water; Spectacle Pond, East 

 Wallingford, (Kent) ; Springfield, (Eggleston) ; common in Wind- 

 ham County, (Grout). 



APOCYNACEAE. DOGBANE FAMILY 



APOCYNUM. Dogbane. Indian Hemp 



A. audrosaeniifolium L. Spreading Dogbane. Thickets and fields; 



common. 

 A. caiinabimim L. Indian Hemp. Moist banks; occasional. 

 A. mediiiiii Greene. Willoughby Lake, (Kennedy) ; rocky shore of 



Winooski River near High Bridge, Essex, (Blake). 



VINCA. Periwinkle 



V. minor* L. Common Periwinkle, Blue Myrtle. Persisting in neg- 

 lected dooryards. 



ASCLEPIADACEAE. MILKWEED FAMILY 



ASCLEPIAS. Milkweed. Silkweed 



A. aiiiplexicaulis Sm. (A. obtusifolia Michx.). Sandy soil; frequent 

 about Burlington. 



A. incarnata L. Swamp Milkweed. Marshes of the lower altitudes; 

 common. 



A. incarnata L., var. pulchra (Bhrh.) Pers. (A. pulchra Ehrh.). 

 Swamp Milkweed. Dummerston, (Addie L. Reed) ; Jamaica, 

 (Wheeler). 



A. pliytolaccoides Pursh. (A. exaltata Muhl.). Poke Milkweed. Moist 

 copses of the lower altitudes; occasional. 



A. quadrifolia Jacq. Rocky woods of the lower altitudes; occasional. 



A. syriaca L. Common Milkweed or Silkweed. Rich grounds; com- 

 mon. 



A. tnberosa L. Butterfly Weed. Dry fields; "Pownal," (Robbins) ; Bel- 

 lows Falls, (Carey, W. H. Blanchard) ; Vernon, (Grout) ; Manches- 

 ter, (Mary A. Day); Brattleboro, (Addie L. Reed). 



CYNANCHUM 



r. nig-nini* (L.) Pers. Black Swallow-wort. Brattleboro, (Frost) ; 

 Windsor, (Leland) ; Hartland, (Underwood). 



CONVOLVULACEAE. CONVOLVULUS FAMILY 



CONVOLVULUS. Bindweed 



C. arvensis* L. Field Bindweed. A garden weed; Woodstock, (Dana) ; 



Burlington, (Jones) ; Rutland, (Kirk) ; becoming common. 

 0. japonicHS* Thunb. California Rose. The double-flowered form is 



an occasional escape from cultivation. 



