xlii CLIMBERS 



14. Twining: without tendrils. 15. 



With tendrils: leaves palmately nerved. 22. 

 Simple. 



15. Leaves neither toothed, angled, nor lobed. 16. 

 Leaves crenate or finely toothed. 17. 



Leaves often angular-lobed. p. 41. Menispermum. 



Leaves, or many of them, deeply or hastately lobed. 20. 



16. Leaves very large, cordate. p. 35. Aristolochia. 

 Leaves moderate: stem slender. p. 40. Cocculus. 



17. Pith excavated or chambered. p. 103. Actinidia. 

 Pith continuous. 18. 



18. Fruit opening: seeds with red aril. p. 87. Celastrus. 

 -Fruit indehiscent. 19. 



19. Leaves large (8-12 cm. long). p. 103. Actinidia. 

 Leaves smaller (scarcely 6 cm.). p. 9.6. Berchemia. 



20. Lower lobes nearly separated. p. 137. .SoLanum. 

 Lower lobes not severed from the rest. 21^ . ....... 



21. Leaves thin, with deep sinuses. . p, 40. Calyeocarpum. 

 Leaves firm, hastate or unlobed.. p. 40. -Cocculus. 



22. Tendrils few, without suckers: fruit cluster forked.. 23. 

 Tendrils abundant, 24. 



23. Leaves thin, broadly ovate. p. 99. Ampelopsis. 

 Leaves rather fleshy. p. 100. Cissus. 



24. Fruit in open forked clusters. p. 99. Parthenocissus. 

 Fruit in pyramidal clusters. p. lOO.Vitis. 



Compound. 



25. POISONOUS. With aerial roots but no tendrils, 



or scrambling. (Toxicodendron) . p. 84. Rhus. 



With tendrils, and sometimes also aerial roots. 26. 

 Twining. 28, 



26. Leaves once compound. 27. 



Leaves bipinnate. p. 99. Ampelopsis. 



27. Leaves thin, often subcordate. p. 99. Parthenocissus. 

 Leaves fleshy, rather cuneate. p. 100. Cissus. 



28. Leaflets 3 or 5, digitate or nearly so. 29. 



Leaflets more than 5, clearly pinnate. p. 74. Wisteria. 



