VITACEAE. 219 



Family 1. RHAMNACEAE Dumort. Buckthorn Family. 



Ovary free from the disk; fruit a drupe. 1. Bhamnus. 



Ovary a.lnate to the disk at its base; fruit dry. 2. Ceanothus. 



1. RHAMNUS L. Buckthorn. 

 1. Rhamnus cathartica L. Common Buckthorn. M. p. 612. Dry soil. 

 Escaped from hedges. Spring. 

 Philadelphia— BsiXixsim's Garden (Cr.). Delaware— YexnviooA, fully 

 naturalized (B. Sm.). Northam'pton-'E.SiStoii, Porter (B. C). 

 Camden— Haddonfield (C). BMriferdon— Pittstown (C). 

 ^eio Castle — Near Greenhill Church, Commons; Duponts near the 

 Burned Keg Mill, Brandywine. 



Rhamnus Caroliniana Walt. M. p. 612. Wet soil. Spring. 

 Philadelphia— Bartr am 's Garden, I. Burk (He.). 

 Petoware— Painters ' Arboretum (Fu.). 



2. CEANOTHUS L. 

 1. Ceanothus Americanus L. New Jersey Tea. M. p. 613. Dry, open 

 woods. Summer. 



Family 2. VITACEAE Lindl. Grape or Vine Family. 



Hypogynous disk present, annular or cup-shaped, lobed or glandular ; leaves 

 not digitately compound. 1. Fitis. 



Hypogynous disk obsolete or wanting; leaves digitately compound, leaflets 

 5-7. " 2. Parthenocissus. 



1. VTTIS L. Grape. 

 Leaves vpoolly beneath. 



Pubescence rusty-brown; berries large, musky. 1. F. Labrusca. 



Pubescence at length whitish; berries small, black, not musky. 



2. V. aestivalis. 

 Leaves glabrate, sometimes slightly pubescent when yoimg. 



Leaves bluish-white, glaucous beneath. 3. V. bicolor. 



Leaves not glaucous beneath. 



Leaves 3-7-lobed; lobes acute or acuminate. 4. V. vulpina. 



Leaves sharply dentate, scarcely lobedt 



High-climbing; leaves large; berries sour. 5. V. cordifolia. 

 Low ; leaves small ; berries sweet. 6. V. rupestris. 



1. ViTis Labrusca L. Northern Fox-grape. M. p. 614. Moist thickets. 



Spring. 



2. ViTis aestivalis Michx. Summer Grape. M. p. 614. Thickets. Spring. 



Philadelphia— ^yherry, Mart. (B. C), Germantown (Me.), Fairmount 

 Park (Pr.). Bucks— Near Sellersville (Fr.), Narrowsville (Mac), Sole- 

 bury Twp. (Ws.). Delaware— Glenol^en (Ke.), Swarthmore (Pr.), Val- 

 ley of Darby Creek and near Media (B. Sm.). Chester— {P.). Lancaster 

 — (P.). Berts— Wernersville (Te.). ZeW^ft— Along base of Blue Moun- 

 tain (Kr.). Northampton — Easton, Porter (B. C). Dauphin — (P.). 



3. ViTis BICOLOR Le Conte. Blue or Winter Grape. M. p. 614. Woods. 



Summer. 

 Bucks — (P.). Lancaster— {P.). Northampton— {P.). Dauphin— 

 (P.). 



