674 REPORT OF NEW JERSEY STATE MUSEUM. 



r. Spikes slender, mostly interrupted, leaves sessile or nearly so. 



[M. sfiicata]* 

 cc. Spikes shorter and denser, leaves petioled. [M. piperita]-f 



bb. Plants villose, hirsute or canescent. 



c. Leaves lanceolate, acute. [M. longifolid\X 



cc. Leaves elliptic, obtuse. [M. rotundifolia]% 



Mentha canadensis L. Wild Mint. 



Mentha canadensis Linnaeus, Sp. PI. 577. 1753 [Canada]. — Britton 196. 



Common in open moist ground in the northern counties and 

 less common southward in the Middle and Coast districts. 

 Fl. — Early July into September. 



Middle District. — Fish House, Medford (S), Washington Park, Mickle- 

 ton, Swedesboro, Woodstown (NB). 

 Coast Strip. — Spray Beach (L). 



COLLINSONIA L. 



Collinsonia canadensis L. 



Collinsonia canadensis Linnaeus, Sp. PL 28. 1753 [Virginia and Canada]. — 

 Knieskern 23. — Britton 195. 



Frequent in woods of the northern counties ; rare southward 

 within our limits. 



Fl. — Early August to late September. 



Middle District.— IJew Egypt, Mantua, Swedesboro (CDL). 



Family SOLANACE^. Potatoes, Groundcherries, etc. 



a. Fruit a prickly capsule, flowers long funnel-form, 70-90 mm. long. Rank 

 herbs 3-15 dm. high. 

 b. Corolla white. [Datura stramoniumY 



bb. Corolla violet purple. [D. tatula]' 



aa. Fruit a berry. 



b. Fruiting calyx enlarged, bladder-like, completely enclosing the berry. 



Physalis, p. 67s 

 bb. Calyx not enlarged. 



c. Climbing vine with purple flowers and red berries. 



[Solanum dulcamaraY 



* Spear Mint, abundantly introduced in meadows. 



t Pepper Mint, locally introduced. 



% Horse Mint, waste ground, very rare. 



§ Round-leaved Mint, waste ground. 



Several other species of Mint are introduced in various parts of the country. 



^ Jimson Weed, an abundant weed. 



^ Purple Jimson, less frequent. 



" Nightshade, in thickets, often appearing like a native. 



