130 VITACEAE 



FAMILY 80. VITACEAE Lindl. 



Vines with alternate and small regular greenish panicled flowers. 

 Calyx minutely 4-5-toothed or entire. Petals 4-5. Stamens 4-5, oppo- 

 site the petals. Ovary 1, 2-6-celled, with 1-2 ovules in each cavity. 

 Fruit generally a 2-celled, 4-seeded berry. 



Leaves simple. 



Petals united into a cap. 1. VITIS. 



Petals separate, spreading. 2. AMPELOPSIS. 



Leaves compound. 3. PARTHENOCISSUS. 



1. VITIS L. 



Tendril-hearing vines with polygamo-dioecious flowers and dentate 

 leaves. Petals falling off without separating. Hypogynous disk present. 

 Berries edible. 



Leaves with a bluish tinge beneath. 1. V. aestivalis. 



Leaves white woolly beneath. 2. V. cinerea. 

 Leaves green on both sides. 



Leaves strongly lobed. 3. V. vulpina. 



Leaves rarely lobed. 4. V. cordifolia. 



1. V. aestivalis Michx. SUMMER GRAPE. Branches terete, glabrous : 

 leaves crenately toothed and more or less lobed, rusty-pubescent beneath : 

 berries 6" wide with a bloom. Thickets near Independence, Courtney 

 and Lake City. May-June. 



2. V. cinerea Engelm. DOWNY GRAPE. Branches angled, floccose- 

 pubescent : leaves more or less angled, crenately toothed : berries 4 X/ 

 wide, without bloom. Common in thickets. June. 



3. V. vulpina L. JUNE GRAPE. Branches terete, glabrous : leaves 

 sharply serrate, nearly glabrous : berries 4 /x wide, in dense clusters, with 

 a bloom. Common in thickets. May-June. 



4. V. cordifolia Michx. FROST GRAPE. Branches terete, rather 

 pubescent : leaves crenate-serrate, glabrous or pubescent beneath : berries 

 3" wide, in long clusters. Not uncommon in woods. June. 



2. AMPELOPSIS Michx. 



Differs from Vitis chiefly in having spreading separate petals and ined- 

 ible berries. 



1. A. cordata Michx. FALSE GRAPE. Leaves heart-shaped, coarsely 

 serrate, sometimes slightly lobed, nearly glabrous : flowers in small pan- 

 icles : berries green and blue mottled. Abundant in low woods. June. 



3. PARTHENOCISSUS Planch. 



Vines with disk-bearing tendrils and digitately compound leaves. 

 Petals spreading. Hypogynous disk wanting. Berries inedible. 



1. P. quinquefolia (L. ) Planch. VIRGINIA CREEPER. Leaflets oval 

 to oblong-lanceolate, toothed, sessile or stalked, glabrous to downy : pan- 

 icle large : berries blue. Common in woods throughout. July. 



