178 FLORA OF PHILADELPHIA. 



14. SANGUISORBA L. Burnet. 



Flowers capitate, greenish; stamens numerous; leaflets 12-20 mm. long. 



1. S. Sanguisorba. 

 Flowers spicate, white; .stamens 4; leaflets 25-75 mm. long. 



2. 8. Canadensis. 



1. Sanguisorba Sanguisorba (L.) Britton. M. p. 512. Fields, roeks and 



ballast. Summer. 



Philadelphia— Philadelphia, Mart. (B. C), Girard Point (Te.). Bucks 

 —Rock Hill (Fr.). Lehigh— Salisbury (ttr.). Northampton— Easton, 

 Porter (B. C). 



Burlington — Moorestown (C). Camden — Kaighn's Point (Ja.). 



2. Sanguisorba Canadensis L. M. p. 512. Bogs and wet meadows. 



Summer. 



Bucks— Pipersville, Bristol (Fr.), Tullytown (Ja.) (Sa.). Delaware— 

 Williamson (Ful) (Mac.) (Wn.), Haverford College (Le.), Valley of 

 Darby Creek (B. Sin.), near Newtown Square (VP.)i Chester— Oxford 

 (Cr.), near Coatesville (St.), Westtown (W. Tr.). Lancaster — (P.). 

 Northampton— (P.) . 



Burlington— Burlington (C), near Moorestown (Sts.). Camden— Cam- 

 den (C). Gloucester — Near Mullica Hill (C), near Mickleton (He.), 

 Swedesboro (Li.). Salem— Auburn (Wa.). Monmouth — Freehold (C). 

 Mercer— Trenton (Wn.), Hightstown, Princeton (C). Middlesex— Sand 

 Hill, South Amboy (C). 



New Castle — Thompson's, Moore's, etc. Not rare. 



15. ROSA L. Rose. 



Sepals persistent, erect on the fruit. 1. S. blanda. 



Sepals deciduous, spreading. 



Leaflets finely serrate ; spines stout, recurved. 2. It. Carolina. 



Leaflets coarsely serrate. 



Infrastipular spines nearly straight; native bushy specieB. 

 Stems with scattered prickles or naked. 



Leaflets 7-9, shining above; flowers corymbose; spines 



stout. 3. B. lucida. 



Leaflets 5-7; flowers solitary or few; spines slender. 



4. B. humilis. 

 Infrastipular spines stout, hooked; introduced wand-like or climb- 

 ing species. 



. Leaflets somewhat pubescent beneath, serrate. 



5. R. canina. 

 Leaflets very glandular beneath, doubly serrate. 



6. B. ruHgmosa. 



1. Rosa blanda Ait. M. p. 513. Moist, rocky places. Summer. 



Bucks — Hilltown (Fr.). Delaware — Middletown, Chrome Run (B. 

 Sm.) . Lancaster— (P.) . 



2. Rosa Carolina L. Swamp Bose. M. p. 513. Borders of swamps and 



streams. Summer. 



3. Rosa lucida Ehrh. M. p. 514. Margins of swamps or moist places. 



Early summer. 



4. Rosa humilis Marsh. Pasture Bose. M. p. 514. Dry or rocky soil. 



Early summer. 



