Jones: Flora of Illinois, 137. Scrophulariaceae 225 



4. SoLANUM L. — Nightshade 



1. Plants more or less prickly; pubescence of stellate hairs. 



2. Flowers lavender or white, 1.5-2 cm. in diameter; berry not enclosed by 

 the calyx; plants perennial; fields, roadsides, waste places, or in open 

 woods, common. June-Sept.. Horse-nettle S. carolinense L. 



2. Flowers yellow, 2-2.5 cm. in diameter; berry enclosed by the prickly calyx; 



plants annual; cult, ground and roadsides, common; native of w. U.S. 



Buffalo-bur. \_Androcera rostrata (Dunal) Rydb.} 



S. rostratum Dunal 



1. Plants not prickly or stellate-pubescent. 



3. Plants perennial, climbing or twining; flowers purple or white; berries 



scarlet, poisonous; moist ground, common; nat. from Eur. June-Oct. 



Deadly Nightshade S. dulcamara L. 



3. Plants annual, erect or spreading; flowers white. 



4. Leaves pinnatifid; berries 1-1.5 cm. in diameter; an occasional weed in 

 cult, ground or waste places. Cook Co., Mojfatt; Carroll Co., Clin- 

 ton. June-Sept S. triflomm Nutt. 



4. Leaves entire or sinuate; berries 5-8 mm. in diameter; roadsides, river 

 banks, and cult, ground; nat. from Eur. (?) June-Oct. Black Night- 

 shade S. nigrum L. 



5. Datura L. 



1. Corolla 6-10 cm. long; plants glabrous or nearly so; leaves angle-toothed; 

 waste places and cult, ground, not uncommon; nat. from Asia. July-Oct. 

 Jimson-weed D. stramonium L. 



1. Corolla 10-20 cm. long; plants glandular-pubescent; leaves entire or undu- 

 late; waste places, not common; nat. from trop. Am. July-Sept 



D. metel L. 



137. Scrophulariaceae Lindl. — Figwort Family 



{Rhinanihaceae Pennell) 



1. Anther-bearing stamens 5; corolla rotate; leaves alternate 1. Verbascum 



1. Anther-bearing stamens 4 or 2. 



2. Corolla spurred at base; stamens 4; capsules opening by one or more slits or pores 



near the apex 6. Linaria 



2. Corolla not spurred; capsules 2-4-valved. 



3. Fifth sterile stamen present: either elongated, or represented by a scale or small 

 gland on the upper side of the corolla-tube. 

 4. Sterile stamen elongated. 



5. Flowers in a dense spike; seeds winged; anthers woolly; leaves serrate, 

 petioled; plants glabrous 2. Chelone 



5. Flowers in a terminal panicle or raceme; seeds wingless 3. Penslcmon 



4. Sterile stamens represented by a small gland or scale on the upper inner side 



of the corolla. 



6. Corolla maroon or purplish green; leaves petioled, sharply serrate or dentate; 



perennials 4. Scrophularia 



6. Corolla blue, pink, or white; upper leaves sessile; annuals 5. ColUnsia 



3. Fifth sterile stamen absent. 

 7. Fertile stamens 2. 



