196 VITACEAE 



tendrils, and the panicles are usually forked. The peduncle 

 below the fork is ^ to 2i/^ inches long. Blossoms open in June 

 or early July, and the fruit matures in September and October 

 as a flattened spherical berry about 14 i^^ch in diameter, which 

 is bluish and provided with a thin, dry pulp. There are, as 

 a rule, 2 broadly ovate seeds in each berry. 



Distribution. — The Heartleaf Ampelopsis is a vine which 

 prefers wooded floodplains along rivers. It ranges from Vir- 

 ginia to Nebraska and south to Florida and Texas. In Illinois, 

 it is distinctly a southern vine, to be searched for in the valleys 

 of the Wabash River from Wabash County south, around the 

 state in the valleys of the Ohio and Cache rivers and up the 

 Mississippi River as far as the southern tip of Jersey County. 

 It also extends some distance up the Illinois from its union 

 with the Mississippi. 



A second species, A. arborea (Linnaeus) Koehne, fig. 49, 

 sometimes called the Pinnate-Leaved Ampelopsis, may occur 

 very sparingly in the extreme southern part of the state. It 

 was recorded many years ago in Jackson County and has been 

 reported in recent years in Union, Alexander and Pulaski coun- 

 ties. It is distinguished from the more abundant species by hav- 

 ing pinnately or bi-pinnately compound leaves, which are defi- 

 nitely serrate on the margins. 



PARTHENOCISSUS Planchon 

 Woodbine Five-Leaved Ivy 



The woodbines are climbing or trailing vines with forking 

 tendrils sometimes tipped with adhesive disks and with alter- 

 nate, palmately 5- to 7-foliate leaves. The flow^ers are perfect 

 or dioecious and borne in compound cymes. There are 5 sepals, 

 5 petals and 5 stamens ; and the 2-celled ovary ripens into a 

 berry, which has but little flesh and is nearly inedible. The 

 seeds are indefinitely 3-angled. 



There are about 10 species in this genus, all of them natives 

 of eastern North America or Asia. Two occur in Illinois. 



Key to the Woodbine Species 



Leaves dull above, inflorescence not dichotomously branched 



P. quinquefolia 



Leaves shiny above, inflorescence dichotomously branched 



P. inserta 



