Edge of woods and in woods, fields, along roadsides and on trees along rivers 

 and streams in e. third of Tex. and Okla. (Waterfall) , fruiting Oct.-Nov.; from 

 Fla. to Tex., n. to N.J., Wise, and Neb. 



2. Ampelopsis Michx. 



Climbing or erect shrubs with tight bark and lenticels, the pith white, with or 

 without tendrils opposite the leaves; leaves thin, deciduous; inflorescence a dichoto- 

 mous cyme; flowers small, greenish, mostly 5-merous and perfect; calyx scarious, 

 saucer-shaped; petals free, spreading; disk cup-shaped, free from ovary except at 

 base, the margins entire or scarcely crenate; berry dry or pulpy; seeds 1 to several, 

 trigonous-obovoid. 



About 25 species in North America and Asia. 



1. Leaves simple or rarely only shallowly lobed, cordate to truncate at base 



1. A. cordata. 



1. Leaves twice-pinnate or ternate, the leaflets small 2. A. arborea. 



1. Ampelopsis cordata Michx. 



Plant nearly glabrous, high-climbing; leaves petiolate, broadly ovate to 

 suborbicular-ovate, cordate to truncate at base, acuminate at apex, to about 15 cm. 

 long and wide, typically smaller, coarsely and sharply toothed, unlobed or very 

 rarely with some shallowly 3-lobed, dark-green above, pale-green beneath; panicu- 

 late cymes lax; style slender; berries oblate, less than 1 cm. in diameter, bluish- 

 purple or greenish. Cissus Ampelopsis Pers. 



In rich woodlands and bottomlands along rivers and streams in the e. half and 

 the Panhandle of Tex. and in Okla. {Waterfall), Apr.-June; from Fla. to Tex. and 

 Mex., n. to Va., O., Ind., 111. and Neb. 



2. Ampelopsis arborea (L.) Koehne. Pepper-vine. 



Plant nearly glabrous, bushy or high-climbing; leaves petiolate, triangular-ovate 

 in outline, twice-pinnate or ternate, 15 cm. long or more; leaflets ovate to rhombic- 

 ovate, acute to acuminate at apex, rounded to cuneate at base, the larger ones 3-7 

 cm. long, coarsely cut-toothed, dark-green above, pale-green beneath; cymes rather 

 short, mostly less than 8 cm. long; disk very thick, adherent to the ovary; berries 

 black, pulpy, subglobose to obovoid, 1-1.5 cm. in diameter. Cissus arborea (L.) 

 Des Moul. 



Along streams, in and on edge of swamp forests, in fencerows and waste places, 

 mostly in s. and e. Tex. and Okla. {Waterfall), June-Aug.; from Fla. to Tex. and 

 n.e. Mex., n. to Md., 111., Mo. and Okla. 



3. Cissus L. Possum-grape 

 A mostly pantropical genus with several hundred species. 

 1. Cissus incisa (Nutt.) Des Moul. Marine-ivy, ivy treebine, cow-itch, hierba 



DEL BUEY. 



A stout heavy vine with warty tight-barked stems to at least 10 m. long from 

 tuberous roots; pith white; leaves petiolate, fleshy-thickened and succulent, to 8 cm. 

 long and about as wide, deciduous or semievergreen, extremely variable, from 

 simple and broadily ovate or ovate-reniform to more or less trilobed or trifoliolate, 

 the margins coarsely and irregularly toothed; leaflets ovate to obovate, cuneate; 

 peduncle at first usually exceeding the subtending leaf, supporting an umbelliform 

 cyme; flowers 4-merous, perfect or unisexual; petals free, spreading; disk a deeply 

 4-lobed cup that is free from the ovary except at its base; berry obovoid, black, 

 6-8 mm. long, dry, beaked by the persistent style, on recurved pedicels, 1- to 

 4-seeded; seeds trigonous-obovoid. 



1112 



