Jones: Flora of Illinois 33 



8. Flowers axillary; leaves cordate; fruit a capsule 



87. Aristolochiaceae 



8. Flowers in small cymes, purple (or rarely white) ; berries ovoid, 



red Solarium dulcamara in 107. Solan'aceae 



5. Plants erect; trees or shrubs. 



9. Leaves cordate, palmately veined; pods 6-8 cm long; shrub or small 



tree Cercis in 54. Leguminosae 



9. Leaves not cordate. 



10. Leaves bristle-tipped Quercus in 65. Fagaceae 



10. Leaves not bristle-tipped. 

 11. Stipules usually present. 



12. Flowers large, greenish yellow, white, or purplish, solitary; 



trees 1 . Magxoliaceae 



12. Flowers not as above. 



13. Flowers in catkins; fruit a capsule 69. Salicaceae 



13. Flowers axillary; fruit a drupe 51. Rhamnaceae 



1 1. Stipules none. 



14. Leaves somewhat palmately veined with 3 principal veins 

 from near the base, often with one or more lateral lobes; 



leaves and bark spicy-aromatic 



Sassafras in 74. Lauraceae 



14. Leaves pinnately veined or 1-veined. 



15. Pith of the twigs chambered, or divided by woody 

 plates; trees with imperfect flowers. 

 16. Leaves crowded towards the ends of the branches; 

 twigs soon glabrous; drupe ovoid or ellipsoid, 1- 

 seeded; flowers 5-merous ....Nyssa in 90. Cornaceae 



16. Leaves not crowded; young twigs pubescent; berry 



large, globose, 4-12-seeded, reddish yellow and 



sweet when ripe, astringent when green 



94. Ebenaceae 



15. Pith continuous; flowers perfect. 



17. Leaves large, 15-40 cm long at maturity, oblanceo- 



late; buds naked, reddish-pubescent; flowers axil- 

 lary, dark purple or green, 2-4 cm in diameter; 

 sepals 3 ; petals 6 ; stamens numerous, in a globose 



mass surrounding the pistils 2. Annonaceae 



17. Leaves smaller. 



18. Leaves evergreen. 



19. Leaves scale-like, numerous, 1-2 mm long, 

 closely imbricated, hoary-pubescent; flow- 

 ers yellow; fruit an ovoid, 3-angled, gla- 

 brous 1-2-seeded capsule; heath-like shrubs 

 10-30 cm tall 12. Cistaceae 



19. Leaves larger, fewer; flowers not yellow; cap- 



sules many-seeded 93. Ericaceae 



18. Leaves deciduous. 



20. Base of petiole hollow, covering the lateral 



buds; terminal bud absent; leaves oval; 

 bark tough and fibrous; flowers pale yel- 

 low, appearing before the leaves; fruit an 



ellipsoid drupe 



Dirca in 76. Thymelaeaceae 



20. Petioles otherwise; terminal bud present. 



