Description of Native Vines 



53. Twin-flow^er. (Linnsea borealis.) 



Leaf : 1', simple, opposite, entire or obscurely round-toothed 

 or wavy-edged, roundish or oval, evergreen, somewhat hairy. 

 Flower : rose or purple to whitish, fragrant, pendent in pairs on 

 long stem (corolla rather bell-shaped, 5-lobed, hairy inside, sta- 

 mens 4) ; June. South to New Jersey and in mountains to 

 Maryland, and west ; herbaceous, trailing. (PI. V.) 



54. Moneywort. Creeping-Charlie. (Lysimachia nummu- 

 laria.) 

 Leaf : i', simple, opposite, entire, roundish, smooth, short- 

 stemmed, base often slightly cordate. Flower : yellow, large 

 (i' across), single (corolla deeply 5-lobed, spreading, lobes al- 

 most roundish, stamens 5) ; July-September. Introduced, becom- 

 ing spontaneous ; trailing, herbaceous. (PI. V.) 



55. Enslenia. (E. albida.) 



Leaf : 3-5' broad, simple, opposite, entire, ovate, base cor- 

 date, apex sharp, long-stemmed. Flower : whitish, small (co- 

 rolla 5-parted, lobes erect), in lengfthened clusters ; July-Sep- 

 tember. Ohio to Illinois, and south ; river-banks ; twining, 

 herbaceous ; milky juice. 



56. Black Vincetoxicum. Black Milkweed. (V. nigrum.) 



Leaf : 2', simple, opposite, entire, ovate or oblong-ovate. 

 Flower . dark purple, small (corolla 5-parted, lobes spreading, 

 stamens 5, anthers adhering to stigma, a 5-10-lobed flat, fleshy 

 disk in centre), clustered. New England to Pennsylvania ; more 

 or less twining, herbaceous, milky juice. 



57. Rough-fruited Milkweed. (Gonolobus obliquus.) 



Leaf : 3'-8', simple, opposite, entire, heart-shaped, apex sharp, 

 stem and stalk quite hairy. Flower : greenish outside, crim- 

 son-purple inside (corolla 5-parted, spreading, i' across, or less, 

 lobes narrow), many-clustered ; July-September ; pod 5' long, 

 rough-pointed. Pennsylvania, south and west, near streams ; 

 twining or trailing, herbaceous, milky juice. 

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