PARTHENOCISSUS 207 



oblong lanceolate, coarsely serrate, dull green above, much paler beneath, 

 glabrous throughout, 4-12 cm. long, 2-6 cm. wide; inflorescence panicu- 

 late, 6-12 cm. long, rather loose, its main branches unequal, flowers small, 

 greenish, about 6 mm. broad, calyx forming a shallow cup, petals spread- 

 ing or reflexed, about 2.5 mm. long, stamens erect, slightly shorter than 

 the petals; fruit a blue-black berry, not very fleshy, 6-7 mm. in diameter: 

 quinquefolia, five-leaved. 



In woods and thickets throughout the state. Distributed from N. H. 

 to Quebec and Manitoba, south to Fla., Tex. and Mexico. Blossoms in 

 June, fruit ripe in September. 



Extensively planted as a climber on porches, fences, walls, etc. Called 

 Parthenocissus or Ampelopsis Engelmannii by horticul- 

 turists. 



Var. Saint Paulii Rehder 1905 



Somewhat pubescent upon the younger leaves and shoots, aerial roots 

 numerous, leaflets cuneate to a sessile or scarcely petiolulate base, cymules 

 somewhat racemosely arranged. 



Occurs in the southeastern part of the state and probably as far north 

 as St. Paul. Distributed from 111. to Iowa and southwestward. 



Parthenocissus vitacea Hitchcock 1894 



A high climbing or trailing vine, tendrils with 2-5 long twining branch- 

 es, these only very rarely ending in adhesive disks, no aerial rootlets; 

 leaves petioled, digitately compound, leaflets 5-7, ovate to ovate-lanceolate, 

 cuneate or slightly rounded at the base, acute at the apex, coarsely dentate, 

 deep green, thin, somewhat shining above, scarcely paler beneath, glabrous 

 or slightly pubescent, 4-13 cm. long, 2-8 cm. wide, petioles 5-10 mm. long; 

 inflorescences regularly dichotomous, flat-topped, peduncles 4-8 cm. long, 

 the first branches nearly equal, flowers greenish, about 5 mm. in diameter, 

 calyx entire, shallow petals spreading or reflexed ; fruit obovoid, bluish 

 black, 6-10 mm. in diameter, somewhat fleshy, at least more so than in 

 the preceding : vitacea, like the grape-vine. 



Common throughout the state. Distributed from Me. to Assiniboia 

 and south to Tex. Planted to some extent, the leaves turn a brilliant scar- 

 let in the fall becoming very showy. 



Thymelaeaceae Leatherwood Family 



Shrubs or trees with very tough, acrid inner bark; leaves alternate, 

 simple and entire; flowers in racemes or capitate clusters or borne singly, 



