322 SOLANACEAE. 



2. SOLANUM L. Nightshade. 



Herbs or shrubs, often stellate-pubescent. Flowers 

 cymose, paniculate or racemose, white, blue, purple or 

 yellow. Calyx campanulate or rotate, mostly 5-toothed 

 or 5-cleft. Corolla rotate, the limb plaited in the bud, 

 5-angled or 5-lobed. Stamens inserted on the throat of 

 the corolla; filaments short; anthers linear or oblong, 

 acute or acuminate, connate or connivent into a cone; 

 the anther-sacs dehiscent by a terminal pore or by a 

 short introrse terminal slit, or longitudinally. Ovary 

 usually 2-celled; stigma small. Fruit a several -seeded 

 berry. 



Prickles none; flowers not yellow. 



Corolla 5-cleft; peduncles longer than the pedi- 

 cels. 

 Annual, villous and viscid; fruit yellow. 1. S. villosum. 



Perennial, puberulent; fruit black. 2. S. douglasii. 



Corolla 5-toothed; peduncles shorter than the 

 pedicels. 

 Leaves entire; stems glabrate or viscid- 

 pubescent. 3. S. xanti. 

 Leaves crenate; stems long-hirsute. 4. 6'. wallacei. 

 Prickles long and straight; flowers yellow. 5. 6". ro stratum, 



\. S. villosum Lam. Rather low and mostly spreading annual, 

 villous and more or less viscid; leaves conspicuously angulate-dentate; 

 filaments somewhat pubescent; berries yellow. 



Occasional in waste places. Soldier's Home. 



2. S. douglasii Dunal. Usually somewhat woody, 1-2 m. high; 

 stems angular, the angles somewhat denticulate-scabrous, otherwise 

 more or less puberulent; leaves variously angular-dentate, or some 

 nearly entire; umbels nearly opposite the leaves, several-flowered; 

 flowers white or pale purplish, 8-14 mm. broad, pubescent without, 

 deeply 5-parted, the lobes lanceolate; anthers yellow, 4-5 mm. 

 long; filaments about 1 mm. long, stout, hairy, nearly equaling the 

 slender style; fruit black. 



A common native plant both in the valleys and mountains at lower 

 altitudes. Often appearing as an introduced plant along roadsides 

 and in waste places. 



3. S. xanti Gray. Stems woody, 3-10 dm. high, the younger 

 angled, moderately villous with many-celled unbranched, mostly 

 gland-tipped hairs; leaves ovate, ovate-oblong to oblong-lanceolate, 

 the largest 4-6 cm. long, acute or obtuse at the base, the margins 

 entire; corolla 1-2 cm. broad, usually deep violet, angulately 5-lobed; 

 berry greenish. 



Common in all the hills and mountains. 



3a. S. xanti glabrescens (Torr.) Parish. Stems woody, slender, 

 10-15 dm. high, glabrate or above hirsutulous with short, mostly 



