PLANTS OF SOUTHERN NEW JERSEY. 675 



cc. Erect herbs with white or whitish flowers. 



d. Plant prickly, berries yellow. [S. carolinense]* 



dd. Plant not prickly, berries black. S. nigrum, p. 675 



PHYSALIS L. 



Physalis heterophylla Nees. Ground Cherry. 



Physalis heterophylla Nees. Linnaea VI. 463. 1831 [North America, prob- 

 ably Pennsylvania]. 



r>ry Open ground; frequent throughout the State, except in 

 the Pine Barrens, where it is local. This and several other 

 species are credited to our region, but they are all so generally 

 weeds that it is impossible to determine if they are native here 

 and, if so, what their original distribution may have been. 



SOLANUM L. 

 Solanum nigrum L. Black Nightshade. 



Solanum nigrum Linnaeus, Sp. PI. 186. 1753 [throughout world]. — Britton 

 181. 



Generally distributed, but such a universal weed that all trace 

 of its original habitat has been lost. The introduced S. dulca- 

 mara (Purple Nightshade or Bitter Sweet) is perfectly natural- 

 ized along the coastal islands, where it is as characteristic as 

 some of the native species. 



Family SCROPHULARIACE^. Figwort, etc. 

 Key to the Species. 



a. Corolla rotate, anther-bearing stamens 5. 



b. Plant densely wooly, flowers yellow, in a dense terminal spike. 



[Verbascum thapsusY 

 bb. Plant glabrous, flowers in a slender raceme, white or yellow, stamens 

 purplish. [V. blattariaY 



aa. Corolla various, anther-bearing stamens 2 or 4. 

 b. Corolla spurred at the base. 



c. Flowers 25-30 mm. long, yellow and orange. [Linaria linariaY 



cc. Flowers 6-12 mm. long, blue. L. canadensis, p. 677 



bb. Corolla not spurred. 



c. Anther-bearing stamens 2. 



d. Dwarf aquatic plants w'th inconspicuous axillary flowers and 

 opposite, entire rounded leaves. Micranthemum, p. 68r 



* Horse Nettle, a bad weed in fields, etc. 



^ Mullein, a common field weed occurring with the next. 



' Moth Mullein. 



' Toad-flax, a frequent weed on roadsides and waste ground. 



