162 GROSSUIvARIACEAE 



tains. Nat. in Pa. — Pennsylvania : Northampton, Easton, escaped ; 

 AlvIvEGHENY. 



Family 7. ITEACEAE Agardh. Itea Family. 

 1. ITEA L. 

 1. Itea Virginica L. Virginia Willow. (Man. p. 4S5 ; I. F. /. 

 1864.) In wet places, N. J. and eastern Pa. to Fla. and La. — Penn- 

 sylvania : Cumberland, on the Susquehanna. 



Family 8. HAMAMELIDACEAE Lindl. Witch-hazel Family. 



Calyx and corolla present : ovule solitary in each cavity, pendulous. 



1. Hamamelis. 

 Calyx and corolla wanting : ovules several or many in each cavity, horizontal. 



2. Liquidambar. 

 1. HAMAMELIS L. 



1. Hamamelis Virginlana L,. WiTch-hazel. (Man. p. 489; I. F./. 

 18/9.) In low woods, N. B. and N. S. to Ont., Minn., Fla. and Tex. — 

 Pennsylvania : Monroe ; Northampton ; Bucks ; Chester ; Lancas- 

 ter ; Lebanon ; Philadelphia ; Franklin ; Somerset ; Erie ; Del- 

 aware ; Allegheny. 



2. LIQUIDAMBAR L. 



1. Liquidambar Styraciflua L. Sweet Gum. (Man. p. 489 ; I. F.y. 

 iSSo.) In low woods. Conn, to Mo., Fla. and Mex. — Pennsylvania: 

 Bucks ; Philadelphia ; Delaware. 



Family 9. G-ROSSULARIACEAE Dumort. Gooseberry Family. 



1. RIBES L. 



Plants armed with firm spines: peduncles 1-3-floweTed (gooseberries). 

 Calyx-lobes shorter than the limb : berry prickly. i. /?. Cynosbali. 



Calyx-lobes longer than the limb : berry smooth and glabrous. 

 Calyx-lobes shorter than the tube and hypanthium : stamens not long-ex- 

 serted. 

 Calyx-lobes oblong, as long as the stamens. 

 Peduncles normally i-flowered : stems usually with 3 spines to- 

 gether. 2. R. Uva-crispa. 

 Peduncles normally 2-flowered : stems with small or obsolete spines. 



3. R. oxyacanthoides. 

 Calyx-lobes linear, shorter than the stamens. 4. R. rolundi/olium. 



Calyx-lobes much longer than the limb and hypanthium : stamens long- 

 exserted. 5. R. Missouriense. 



Plants unarmed (or in R. lacustre v/ith. spines and numerous bristles) : pedun- 

 cles many-flowered {currants). 

 Berries bristly. 

 Stem bristly and spiny. 6. R. lacuslre. 



Stem smooth and glabrous. 7. R. prostratum. 



Berries smooth and glabrous. 



Hypanthium tubular : sepals narrow : berry black. 8. R.floridum. 

 Hypanthium campanulate : sepals broad: berry red. 9. R. rtibrum. 



