132 VlTACEAE. 



pith not diaphragmed at the nodes; alternate leaf-scars; nar- 

 row stipule-scars ; small buds ; simple or in one species pinnate 

 or bipinnate scarcely fleshy leaves ; small greenish perfect poly- 

 petalous flowers in forking clusters opposite the leaves ; and 

 small pale blue or purple large-seeded berries. (Cissus). 



1. Leaves simple. 2. 



Leaves pinnate or bipinnate. (Pepper vine). A. arborea. 



2. Leaves whitened beneath. A. humulifolia. 

 Leaves not whitened beneath. 3. 



3. Leaves serrate, little lobed : fruit scarcely showy. A. cordata. 

 Leaves crenately toothed : fruit multicolored. 4. 



4. Leaves deeply lobed. (Turquoise berry). A. heterophylla. 

 Leaves little lobed. A. heterophylla amurensis. 



PARTHENOCISSUS. Virginia Creeper. "Ampelopsis". 

 Woody close-barked plants climbing by coiling or more fre- 

 quently disk-bearing tendrils, with soft brownish wood with 

 rather large scattered ducts and coarse medullary rays ; sym- 

 podial branches with green or pale continuous or finally cham- 

 bered or excavated rounded pith not diaphragmed at the swol- 

 len 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 i 

 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. 



