Jones: Flora of Illinois 23 



38. Ovary 2-loculed. with numerous ovules; fruit a many- 

 seeded capsule 108. Scrophulariaceae 



38. Ovary deeply 4-lobed ; fruit of 4 nutlets; stamens 5, 

 exserted, unequal; plants pubescent, biennial; flowers 



1.5-2 cm in diameter, bright blue 



Echium in 115. Boraginaceae 



37. Ovary inferior; capsule 2-loculed, many-seeded, opening at 

 the top; stamens 5, the anthers cohering in a tube around 

 the style 122. Lobeliaceae 



Section 8. Dicotyledonous Herbs With Toothed or Lobed Alternate Leaves 



1. Flowers sessile, small, in dense heads on a common receptacle surrounded or 



subtended by an involucre of bracts; fruit an achene 125. Compositae 



1. Flowers not as above. 



2. Fruit and ovary covered with hooked bristles; corolla minute, greenish 

 yellow; leaves deeply lobed; flowers in small compact head-like umbels 



Sanicula in 92. Umbelliferae 



2. Fruit and ovary never with hooked bristles. 

 3. Leaves conspicuously lobed. 



4. Corolla of united petals (sympetalous). 



5. Corolla irregular 108. Scrophulariaceae 



5. Corolla regular. 



6. Stems usually twining; plants with milky juice 



105. Convolvulaceae 



6. Stems not climbing; plants with watery juice. 



7. Styles 2 106. Hydrophyllaceae 



7. Style 1 107. Solanaceae 



4. Corolla of separate petals, or petals absent. 



8. Calyx-lobes 3; flowers small, sessile, axillary, greenish, apetalous; 

 upper leaves toothed, the lower ones deeply pinnately lobed ; 



plants of wet habitats; fruit sharply angled 



Proserpinaca in 119. HaloraGACEAE 



8. Calyx-lobes or sepals more than 3. 

 9. Sepals and petals each 4. 



10. Ovary superior; stamens 6; capsule 2-valved 



18. Cruciferae 



10. Ovary inferior; stamens 8; capsule 4-valved 



83. Onagraceae 



9. Sepals 5 or 6 (or in sp. of Atriplex) . 



11. Petals none; flowers small, green or greenish; fruit an 



achene or utricle. 

 12. Leaves stipulate; sepals 6; stamens 6; fruit an achene 

 32. Polygon aceae 



12. Leaves without stipules; sepals 5 (or in sp. of Atri- 



plex) ; stamens 5; fruit a utricle ....27. Chenopodiaceae 

 11. Petals usually present. 



13. Flowers regular. 



14. Ovary inferior; stamens numerous; fruit a capsule 



80. LoAs aceae 



14. Ovary superior. 



15. Stamens 10 (rarely 5), free or nearly so; ovan.- 

 5-lobed. each lobe becoming a 1 -seeded nutlet 

 36. Geraniaceae 



