DICOTYLEDONS. 205 



and enclosing the fruit ; corolla campanulate, plaited, 5-lobed 

 or 5-angled, yellowish, usually with a dark brown or purple 

 center ; stamens shorter than the corolla and inserted in its 

 tube ; ovary 2-celled, style slender, stigma obtuse, 2-lobed ; 

 fruit a juicy, many-seeded berry, enclosed in the membra- 

 naceous and reticulated calyx. 



1. P. PUBESCENS L. Haiky Grouxd Cherry. Annual; stem 

 diffusely branched, 4-angled, with one side rounded, often swollen at 

 the nodes, tomentose or villous with viscid hairs, or sometimes nearly 

 smooth, 1-2 ft. high ; leaves long-petioled, ovate, acuminate at the 

 apex, rounded or slightly cordate and uneven at the base, wavy- 

 margined or entire, pubescent; calyx short in flower, with the teeth 

 longer than the tube, becoming about 1 in. long in fruit, ovoid, 

 refuse and sharply 5-angled at the base ; corolla about i in. wide, 

 bright, yellow with a brown center ; filaments hairy, anthers pur- 

 plish ; berry yellow or greenish. June-October. Common in waste 

 places. 



2. P. ANGULATA L. WiLD Ground Cherry. Auuual ; smooth 

 throughout; stem sharply 4-angled, erect or decumbent, 1-4 ft. long; 

 leaves ovate, acute at the apex, obtuse or truncate and uneven at the 

 base, sharply toothed, long-petioled; calyx lobes about as long as 

 the tube in flower, fruiting calyx ovoid, 10-angled, reticulated with 

 purple veins ; corolla small, yellow ; anthers purple ; berry yellow, 

 nearly as large as the calyx. June-August. 



3. P. viscosA L. Sticky Ground Cherry. Perennial from 

 a slender rootstock ; stem at first erect, becondng dift'use and decum- 

 ])ent, angled, viscid-pubescent, 8-20 in. long ; leaves ovate and irregu- 

 lar in outline, acute or obtuse at the apex, mostly rounded below, 

 angular-toothed or entire, pubescence stellate, petiole ^-1 in. long ; 

 ])edunc]es longer than the petioles ; flowering calyx with lobes shorter 

 than the tube, pubescent, fruiting calyx ovoid, .')-angled, truncate or 

 slightly sunken at the base; corolla greenish-yellow, witli a dark 

 tliroat, about ^ in. wide, obscurely lobed ; anthers yellow; berry vis- 

 cid, yellow or orange. June-October. On sandy soil. 



II. SOLANUM. 



Herbs or shrubs; stems often prickly, sometimes climbing; 

 leaves alternate, often nearly or quite o])posite ; flowers clus- 

 tered, the ])eduncles often o])posite or above the axils; calyx 

 spreading, iVtoothed or o-cleft, ])ersistent; corolla rotate, 

 5-l()l)('d; stamens 5, cxsrrted, the filaments very short, the 



