Genus 6. 



POTATO FAMILY. 



i6 5 



Solanum villosum (L.) Mill., with coarsely den- 

 tate leaves, the pubescence villous and somewhat 

 viscid, has been found in ballast about the seaports. 



2. Solanum triflorum Nutt. Cut-leaved 

 Nightshade. Fig. 3718. 



Solanum triflorum Nutt. Gen. 1: 128. 1818. 



Annual, sparingly pubescent with simple hairs, 

 or glabrous; stem branched, i-3 high. Leaves 

 pinnatifid or some of them pinnately lobed, acute 

 at the apex, petioled, 2'-4' long, the lobes trian- 

 gular-lanceolate, acute or obtuse, entire or dentate, 

 the sinuses rounded ; peduncles lateral, 1-3-flow- 

 ered, i'-l' long; pedicels 3"-/' Ion S. reflexed in 

 fruit ; calyx-segments lanceolate, shorter than the 

 corolla, persistent at the base of the berry; co- 

 rolla white, 4"-S" broad ; anthers obtuse ; berries 

 green when mature, globose, smooth and glabrous, 

 about 5" in diameter. 



On prairies and in waste places, Ontario to Mani- 

 toba, Kansas, New Mexico and Arizona. Introduced 

 m Missouri. May-Oct. 



Solanum carolinense L. 



Horse-Nettle. Sand-Brier. Fig. 3719. 



Solanum carolinensis L. Sp. PI. 184. 1 753- 



Perennial, green, finely stellate-pubescent 

 with 4-8-rayed hairs ; stem erect, branched, 

 l-4 high, the branches, petioles, midveins 

 and sometimes the lateral veins of the leaves 

 armed with straight subulate yellow prickles. 

 Leaves oblong or ovate, repand, lobed, or pin- 

 natifid, 2'-6' long, the lobes obtuse or acutish; 

 petioles 3"-io" long ; flowers cymose-racemose, 

 appearing terminal, but really lateral, as is 

 manifest in fruit ; pedicels i"~7" long, re- 

 curved in fruit ; calyx-lobes lanceolate, acumi- 

 nate, about one-half the length of the corolla, 

 persistent at the base of the berry; corolla- 

 lobes ovate-lanceolate, acute ; anthers elon- 

 gated ; berries orange-yellow, smooth and 

 glabrous, 8"-io" in diameter. 



In dry fields and in waste places, southern On- 

 tario to Vermont. Massachusetts and Florida, west 

 to Illinois, Nebraska and Texas. Adventive in its 

 northeastern range. Apple-of-sodom. Radical- 

 weed. Bull-nettle. Tread-softly. May-Sept. 



4. Solanum eiaeagnifolium Cav. Silver- 

 leaved Nightshade. Fig. 3720. 



.S". eiaeagnifolium Cav. Icon. 3: 22. pi. 243. 1794- 



Perennial, densely and finely stellate-pubescent, 

 silvery-canescent all over; stem branched, l-3 

 high, armed with very slender sharp prickles, or 

 these wanting. Leaves lanceolate, oblong, or 

 linear, petioled, 1-4' long, 3,"-I2," wide, mostly 

 obtuse at the apex, narrowed or rounded at the 

 base, repand-dentate or entire; flowers cymose, 

 8"-i2" broad, violet or blue; peduncles short and 

 stout, appearing terminal, but soon evidently lat- 

 eral ; calyx-lobes lanceolate or linear-lnceolate, 

 acute ; anthers linear ; ovary white-tomentose ; 

 berries globose, yellow or darker, smooth and 

 glabrous, 4"-6" in diameter. 



On dry plains and prairies, Missouri and Kansas 

 to Texas and Arizona. Trompillos. May-Sept. 



