124 FLORA OF- PHILADELPHIA. 



17. Quercus macrocarpa Michx. Bur Oak, Mossy-cup Oak. M. p. 336. 



Eieh soil, cultivated. Spring. 



Philadelphia— Bartram 's Garden, WissahiiJkon (Je.). Montgomery — 

 Chelten Hills ( Te. ) . Delaware— Lansdowne ( Pe. ) . Northampton— ( P. ) . 



Atlantic— Ventnor (Gi.). 



New Castle— One tree between Broome and Bodney streets near Lover- 

 ing Avenue, Canby. 



18. Quekcus PLATANOiDES,(Lam.) Sudw. Swamp, White Oak. M. p. 336. 



Borders of streams and swamps. Spring. 



Philadelphia— Washington Square (Je.). Bucks— Rock Hill (Fr.), 

 Argus (Ke,). M ontgomery — Shannonville (Cr.), Edge Hill (Me.). 

 Delaware— Concord (W. Tr.), Tinicum (B. Sm.). Chester— Willistown 

 Twp. (Pr.), Pocopsin (St.). Lancaster— York Furnace (Ke.). Lehigh 

 — Salsburg (Kr.). Northampton— 'Easton, . Porter (B. C). 



Bwlington — Moorestown (Br.), Maxleton (C), Medford (St.). 

 Gloucester— Near Miekleton (He.), Swedesboro (I/i.). Salem— Kiddle- 

 ton (Wa.). 



New Castle— Kichardson 's, Bed Clay Creek. Scarce. . 



19. Quercus Michauxii Nutt. Basket Oak, Cow Oak. M. p. 336. Moist 



soil. Spring. 

 Burlington — Moorestown (Br.). 

 New Castle — J. Woodward's woods, Commons. 



20. Querous Prinus L. Bock Chestnut Oak. M. p. 336. Bocky banks 



and hillsides. Spring. 



21. Quercus acuminata (Michx.) Houda. Yellow Oak, Chestnut Oak. M. 



p. 336. Dry soil, especially limestone ridges. Early summer. 



Philadelphia — Center Wissahickon (Je.). Bucks — Near Sellersville 

 (Pr.). Chester— Valley Porge (St.). Lancaster — (P.). Northampton— 

 Easton, Porter (B. C). 



Gloucester — Mullica Hill (C), near Miekleton (He.). Cumberland — 

 Bridgeton (C). 



New Castle— Serpentine, Centerville, Commons; Brandywine Hills. 



22. Quercus prinoides Willd. Scrub Chestnut Oak. M. p. 336. Dry 



sandy or rocky soil: Spring. 



Bucks — Nockamixon (Pr.). Delaware — Williamson (Ja.), Marple 

 (B. Sm.), Castle Bock (VP.). Chester — Serpentine Barrens near West- 

 town (Le.). Lancaster — (P.). 



Northampton— Easton, Porter (B. C). 



New Jersey — Common. 



New Castle-^ Near Wooddale, Christiana. Bare. 



Order 6. URTIOALES. 



Fruit not an achene (except in Humulus and Cannabis) : trees, shrubs, 

 or> herbs, ovule pendulous. 

 Trees with alternate leaves, sap not milky. Fam. 1. Ulmaceae. 



Trees with alternate leaves and milky sap or opposite leaved herbs, 

 or herbaceous vines. Fam. 2. Moraceae. 



Fruit an achene; herbs with small clustered greenish flowers; ovule erect 

 or ascending. Fam. 3. Urticaceae. 



