100 VlTACEAE 



diaphragmed at the swollen nodes; alternate rounded buds 

 with mostly 2 or 4 exposed scales; half-round or round leaf- 

 scars with about 10 bundle-traces in a ring; elongated stipule- 

 scars; digitate 3- or 5-foliolate thin leaves, in one species 

 fleshier and often with 1 leaflet and so appearing simple; small 

 greenish perfect flowers in forking clusters opposite the leaves ; 

 and small purplish large-seeded berries. (Psedera,} . 



1. Tendrils long, rarely with suckers. P. vitacea. 

 Tendrils with abundant suckers. 2. 



2. Leaves compound, mostly of 5 leaflets. 3. 

 Leaves appearing simple, or of 3 broad firm leaflets. 



(Boston ivy). P. tricuspidata. 



3. Glabrous: leaves pale beneath: tendrils long. 



(Virginia creeper). P. quinquefolia. 



Pubescent: tendrils short. 4. 



4. Leaves whitened beneath. P. quinquefolia Engelmannii. 

 Leaves green: with aerial roots. P. quinquefolia Saint Paulii. 



Cissus. "Marine Ivy." 



Woody plants climbing by coiling tendrils, with rather 

 succulent sympodial branches with pale continuous rounded 

 pith not diaphragmed at the nodes; alternate short buds; 

 rounded leaf-scars; small stipule-scars; rather fleshy digitately 

 3-foliolate leaves; small greenish perfect polypetalous flowers 

 in repeatedly forking clusters opposite the leaves; and small 

 purplish large-seeded berries. 

 Leaves fleshy, mostly of 3 coarsely toothed leaflets. C. incisa. 



VITIS. Vine. Grape. 



Deciduous sympodial shrubs climbing by coiling branched 

 tendrils opposite the leaves; with typically shredding brown 

 bark; soft brown wood with large diffused ducts and coarse 

 medullary rays; moderate terete twigs; small rounded con- 

 tinuous brown pith typically with firmer plates at the nodes; 

 alternate somewhat raised roundish or U-shaped leaf-scars with 

 about 5 bundle-traces; long narrow stipule-scars; round-ovoid 

 sessile buds with several exposed scales ; rather large long- 



