30 American Midland Naturalist Monograph No. 7 



14. Margins crenate; ovary superior; stamens 4-5, inserted 



with the petals and opposite them; fruit a drupe 



Rhamnus in 51. Rhamnaceae 



11. Margins lobed and often toothed. 

 16. Lobes acute, toothed. 



17. Trees; styles 2; fruit a pair of samaras 50. Aceraceae 



17. Shrubs; style 3-lobed; fruit a 1-seeded drupe 



Viburnum in 120. Caprifoliaceae 



16. Lobes obtuse, entire; shrubs; stamens 5, inserted on the pink 



sympetalous corolla; fruit a 2-seeded drupe 



Symphoricarpos in 120. Caprifoliaceae 



10. Margins entire, or merely undulate or slightly crenulate or denticulate. 

 18. Plants parasitic on the branches of trees; leaves thick, leather)'; fruit 



a berry 89. Loranthaceae 



18. Not parasitic. 



19. Leaves beneath, and branchlets covered with minute silvery 

 scales; flowers small, axillary, unisexual; calyx 4-parted; corol- 

 la 0; stamens 8; fruit a drupe 77. Elaeagnaceae 



19. Leaves not sihery. 



20. Leaves with small black dots; low shrubs; flowers yellow, 

 cymose; sepals and petals each 4 or 5; stamens numerous; 



fruit a capsule 19. Hypericaceae 



20. Leaves not black dotted. 



21. Leaves large (15-50 cm long), ovate or cordate. 



22. Leaves usually in whorls of 3; flowers whitish, marked 

 with yellow and purple; anther-bearing stamens 2; 



capsules cylindrical 



Catalpa in 109. Bignoniaceae 



22. Leaves opposite; flowers purple; anther-bearing sta- 



mens 4; capsules ovoid 



Paulownia in 109. Bignoniaceae 



21. Leaves usually smaller. 



23. Twining or climbing shrubs; flowers perfect; corolla 



sympetalous. 



24. Follicles 2, slender, many-seeded; seeds comose; 



calyx glandular inside; corolla regular 



Trachelosperrnurn in 99. Apocynaceae 



24. Fruit a few-seeded berry; corolla irregular 



Lonicera in 120. Caprifoliaceae 



23. Erect shrubs or small trees. 



25. Leaves slightly crenate near the middle, lanceo- 



late, acuminate at each end; plants dioecious 

 or polygamous, the flowers apetalous, or petals 

 small and deciduous; stamens 2-4; drupe with 

 1, or rarely 2 seeds Forestlera in 98. Oleaceae 



25. Leaves entire, not acuminate. 



26. Leaves short-petioled. 



27. Bark of stems and branches more or less 

 loose and shreddy; ovary inferior; calyx 



and corolla 5-lobed 



120. Caprifoliaceae 



