Flora of the Palousc Region 155 



■ 260. SOLANUM. 



Herbs or shrubs: calyx and rotate corolla 5-parted or cleft, the 

 latter plaited in the bud: stamens epipetalous, exserted: filaments 

 very short; anthers converging: styles elongated; ovary 2-celled, 

 rarely more: fruit a berry. 



Annual herbs: flowers white. S. nigrum. 



Climbing shrub: flowers violet. S. dulcamara. 



S. nigrum L. Annual, glabrous or somewhat pubescent, usually 

 branched, 15-30 cm. high: leaves ovate or triangular, acute or obtuse, cun- 

 eate at base, sinuately toothed or rarely entire, 1-4 cm. long; petioles shorter 

 than the blades: flowers in lateral peduncled small cymes: calyx-lobes ob- 

 tuse: corolla white, deeply 5-cleft, the lobes spreading: berries globose, black. 

 In cultivated soil, along Snake River. 



S. dulcamara L. Perennial, half-shrubby, with climbing or spreading 

 branches, sometimes 1 m. or more long, pubescent or glabrate: leaves ovate, 

 acuminate, cordate, simple, 2-6 cm. long, or many of them with 3 lobes or 

 3-divided at base, the lateral segments smaller; petiole slender, shorter than 

 the blades: cymes loose: flowers usually purple, 10-12 mm. broad: corolla- 

 lobes spreading, triangular, acuminate: berries subglobose, red. Sparingly 

 introduced. 



261. DATURA. 



Rank narcotic-poisonous annual or perennial weeds, erect, tall, 

 branching: leaves alternate, petioled, ovate: flowers large, showy, 

 solitary, on short peduncles, in the forks of the stems: calyx pris- 

 matic, 5-toothed, deciduous: corolla funnelform, with a 5-10- 

 toothed plaited border: fruit a globular prickly 4-valved 2-celled 

 capsule: seeds rather large, flat. 



Flowers white. U. STRAMONIUM. 



Flowers pale-violet. D. tatula. 



D. stramonium k- Annual, glabrous or nearly so, green, 30-90 cm. high: 

 leaves ovate, acuminate or acute, coarsely toothed or lobed, usually nar- 

 rowed at base, petioled, 6-20 cm. long: calyx-tube 5-angled, not half as long 

 as the wdiite corolla, this 6-10 cm. long: capsule ovoid, densely prickly, the 

 lower prickles usually shorter. .Sparingly introduced. 



D. tatula L. Much like the preceding, but the stem purplish, the corolla 

 pale-violet and the prickles of the fruit nearly equal in length. Introduced 

 in a few places. 



262. NICOTIAN A. 



Rank acrid-narcotic herbs: leaves mostly entire: flowers in 

 racemes or panicles, sometimes showy: calyx bell-shaped or ob- 

 long, 5-toothed or lobed, persistent: corolla commonly funnelform 

 or salverform, the plaited border 5-lobed: stigma capitate, some- 

 what 2-lobed: fruit a smooth 2 4-valved 2-celled capsule: seeds 

 numerous, small. 



