170 FLORA OF PHILADELPHIA., 



5. CHEYSOSPLENIUM L. 

 1. Chrysosplenium Americanum Schwein. Golden Saxifrage. M. p. 483. 

 Cold, wet places. Early spring. 



Family 6. HYDRANGEACEAE Dumort. Hydrangea Family. 



Stamens 8-10; exterior flowers of the corymb usually neutral. 



1. Hydrangea. 

 Stamens 20-40; all flowers perfect. 2. Philadelphus. 



1. HYDRANGEA L. 

 1. Hydrangea arborescens L. Wild Hydrangea. M. p. 484. Rocky 

 banks. Early summer. 

 Philadelphia— Bsinks of Schuylkill, Mart. (B. C), Chamounix (Ke.), 

 Shawmont (Le.) (Sa.), Fairmount Park (Te.) (Wn.). Bucis — Nar- 

 rowsville, Dr. J. B. Brinton (B. C), Point Pleasant (Fr.),Brownsburg, 

 Delaware River shore (Ws.). Montgomery — Rose Glen (Ja.), Pencoyd 

 (Re.), W. Spring Mills (U. C. S.), Flat Rock Tunnel (Wn.). Chester— 

 Valley Forge (Cr.). Lancaster — York Furnace (Cr.) (Li.), Susquehanna 

 River (Pr.). Lehigh— Along the Lehigh, Laurel Hill (Kr.). Northamp- 

 ton— Easton, Porter (B. C). Dauphin— Steelion (Wn.). 



Burlington — Bordentown (C). Hunterdon — Lambertville, Mountain 

 Gilboa, Raven Rock (C). 



2. PHILADELPHUS L. Mock Orange. Syringa. 



Flowers inodorous, solitary or few. 1. P. grandiflorus. 



Flowers racemose, numerous, fragrant. 2. P. coronarius. 



1. Philadelphus grandiflorus Willd. M. p. 485. Escaped from cultiva- 



tion. Spring. 



2. Philadelphus coronarius L. M. p. 485. Escaped from cultivation. 



Early summer. 



Family 7, ITEACEAE Agardh. Itea Family. 

 1. ITEA L. 

 1. Itea Virginica L. M. p. 485. Wet places in the pine-barrens. Early 

 summer. 

 New Jersey — Frequent. 

 New CastZe— Frequent. 



Family 8. GROSSULARIACEAE Dumort. Gooseberry Family. 



1. RIBES L. 

 Leaves plicate in vernation. 



Racemes 1-4 flowered, stem generally with subaxillary spines. 



Calyx-lobes oblong, shorter than the tube; berry often spiny or 



bristly, stamens not exserted. 1. B. Cynosbati. 



Calyx-lobes equalling or exceeding the tube; berry glabrous. 

 ' Stamens scarcely exceeding the oblong calyx-lobes. 



2. B. oxyacanthoides. 

 Stamens somewhat exceeding the linear calyx-lobes. 



3. B. rotundifolium. 

 Racemes many-flowered; stem unarmed; calyx campanulate. 



4. B. floridum. 



