PLAT AN ACE AE. 171 



Leaves convolute in bud; stem unarmed; calyx-tube tubular, bright yellow. 



5. B. aureum. 



BIBES L. Gooseberry and Currant. 



1. Ribes Cynosbati L. Dog-berry. M. p. 486. Eocky woods. Spring. 



Lancaster— Columbia (Pr.). Berks — Monocacy (Me.), near Hamburg 

 (Wn.). 



2. Ribes oxyacanthoides L. M. p. 487. Wet woods. Early summer. 



Bucks— Narrowsville (Li.). Delaware— Chester Heights (Wn.). Lan- 

 caster— (P.). Northampton— Ten Argyl (Ja.). 



3. Ribes rotundtFolium Michx. M. p. 487. Rocky woods. Early summer. 



Bucks— Nockamixou (Fr.) (Ws.), Haycock Mountain (Ws.). Berks— 



Monocacy (Me.)., Lehigh— IdiewQd, along the Lehigh (Kr.). North- 

 ampton— Easton (Ca.). 



4. Ribes floridum L'Her. Wild Black Currant. M. p. 488. Woods. 



Spring. 



Philadelphia— Wissahickon (Je.), Shawmont (Sa.). Bucks— Near Sel- 

 lersville (Fr.), Narrowsville (Li.). Montgomery — F\ai Rock Tunnel 



(Te.). Delaware— Lansdowne (Pe.), Valleyof Darby Creek (B. Sm.), 

 Middletown (W. Tr.). Chester— (P.). Northampton— Easton, Porter 

 (B. C). Lehigh— Coplay, cult. (Kr.). 



Mercer— Princeton and along Assanpink Creek (C). Somerset— Pea- 

 pack (C). 



New Castle— Riddles, Tatnall; Pyle's Mill, T. Burris' Run and Center- 

 ville, Commons. 



5. Ribes aureum Pursh. Golden Currant. M. p. 488. In cultivation. 



Spring. 



Ribes rubrum L. Bed Currant. M. p. 488. Escaped from culti- 

 vation. Spring. 



Family 9. HAMAMELIDACEAE Lindl. Witch-Hazel Family. 



Ovules 1 in each cavity; flowers perfect or polygamous; shrubs or small 

 trees; fruit not spiny. 1. Eamamelis. 



Ovules several in each cavity; flowers monoecious; large trees; fruit glob- 

 ular, spiny. 2. Liquidambar. 



1. HAMAMELIS L. 

 1. Hamamelis Virginiana L. Witch-hazel. M. p. 489. Damp woods. 

 Autumn. 



2. LIQUIDAMBAR L. 

 1. LiquiDAMBAR Styraciflua L. Sweet-gum. M. p. 489. 



Philadelphia— Valley of Delaware. Bucks— Bristol(Fr.). Delaware— 

 U. Darby, Tinicum (B. Sm.). 



Family 10. PLATANACEAE Lindl. Plane Tree Family. 

 1. PLATANUS L. 

 1. Platanus occidentalis L. Sycamore, Buttonwood. M. p. 490. Allu- 

 si .vial banks. Spring. 



