32 American Midland Naturalist Monograph No. 7 



12. Fruit a pod; flowers often papilionaceous 



54. Leguminosae 



12. Fruit a drupe; flowers never papilionaceous 



49. Anacardiaceae 



9. Leaflets more or less toothed. 



13. Leaflets 11-41, entire except for two or more coarse teeth at the 

 base, lanceolate, 7-15 cm long; leaves 20-90 cm long, ill- 

 scented; flowers small, greenish, polygamous, in erect panicles 

 10-30 cm long; samaras 3-4 cm long, twisted, with the com- 

 pressed seed in the middle 35. Simarubaceae 



13. Leaflets with numerous teeth. 



14. Stipules none; flowers greenish. 



15. Trees; staminate flowers in catkins; fruit a nut 



67. Juglandaceae 



15. Shrubs; flowers in panicles; fruit a drupe 



49. Anacardiaceae 



14. Stipules present (sometimes soon disappearing) ; flowers not 



green or in catkins 53. Rosaceae 



1. Leaves 2-3-compound. 



16. Petioles and midribs often with small prickles; leaflets ovate, acute, ser- 

 rate to entire; flowers small, white, in umbels; drupes numerous, 



small, black, ovoid; shrub or small tree with prickly branches 



Aralia spinosa in 91. Araliaceae 



16. Petioles and midribs never spiny; fruit a legume. 



17. Leaflets 12-28, obtuse, 2-3.5 cm long, remotely denticulate; trees, 



usually with spines on the trunk and branches 



Gleditsia in 54. Leguminosae 



17. Leaflets 30-60, acute, 4-8 cm long, entire; trees without spines 



Gyrnnocladus in 54. Leguminosae 



Section 14. Trees or Shrubs (Including Woody Climbers) With 

 Alternate Simple Entire Leaves 



1. Branches or stems more or less prickly or spiny. 



2. Leaves usually with a pair of tendrils at the base of the petiole 



Srnilax in 130. Liliaceae 



2. Tendrils absent. 



3. Leaves ovate or ovate-lanceolate, acuminate; twigs with sharp spines; 

 flowers small, greenish, unisexual; fruit yellow, as large as a grape- 

 fruit; trees with milky juice Madura in 71. Moraceae 



3. Leaves oblanceolate or lanceolate, often fascicled on short lateral 

 branchlets. 

 4. Trailing or climbing shrubs with arching or spreading light gray an- 

 gular branches; flowers greenish purple; berries red, many-seeded 



Lyciuni in 107. Solan aceae 



4. Erect shrubs or small tree; flowers white; drupe black, 1 -seeded 



96. Sapotaceae 



1. Plants without spines or prickles. 

 5. Plants prostrate or climbing. 



6. Stems prostrate; tendrils none 93. Ericaceae 



6. Stems climbing or twining. 



7. Tendrils usually present at base of petioles; flowers in umbels, green- 

 ish; fruit a berry Smilax in 130. Liliaceae 



7. Tendrils none. 



