308 FLOBA OF PHILADELPHIA. 



Pappus of simple bristles. 



Acliene spinulose, or with short processes near the summit. 



7. Taraxacum. 

 Achenes smooth or papillose, not spinnlose toward the summit. 

 Achenes flattened. 



Achenes truncate, not beaked; flowers yellow. 8. Sonchus. 

 Achenes narrowed at the summit or beaked; flowers blue or 

 yellow. 9. Lactuca. 



Achenes cylindric or prismatic. 



Achenes narrowed at the base, narrowed or beaked at the sum- 

 mit ; flowers yellow. 10. Crepis. 

 Achenes narrowed at the base, otherwise columnar, truncate 

 (except two species of Hieracium). 

 Flowers yellow, orange or red. 11. Hieracium. 

 Flowers white, cream-colored or purple. 12. Nabalus. 



1. CICHORIUM L. Succory. Chicory. 

 1. CiCHORiUM Intybtts L. M. p. 891. Roadsides, fields and waste places. 

 Summer. 



2. LAPSANA L. 

 1. Lapsana communis L. Nipplewort. M. p. 891. Roadsides and waste 

 places. Summer. 

 Philadelphia — Greenwich Point, I. Burk (Fu.) (He.). Lancaster — 

 (P.). Northampton— 'Eia^.iou (Ca.). 

 Cawdeji—Kaighn's Point (Ja.) (Te.). Mercer— Princeton (C). 



3. ADOPOGON Neck. Dwarf Dandelion. 



Stem 1-leaved and branched above, bearing 2-6 heads. 1. A. Firginicum. 

 Scape naked, monocephalous. 2. A. Carolinianum. 



1. Adopogon Virginigum (L.) Kuntze. Cynthia. M. p. 892. Moist banks. 



Summer. 



2. Adopogon Carolinianum (Walt.) Britton. Dwarf Dandelion. M. p. 



892. Dry, sandy soil. Spring and summer. 



4. LEONTODON L. 



Plant nearly glabrous ; scape commonly branched ; pappus-bristles all plu- 

 mose. 1. L. aut'umnale. 



Plant somewhat hirsute: scape simple; outer pappus of outer achenes 

 simple. 2. L. nudicaule. 



1. Leontodon autumnale L. Fall Dandelion. M. p. 893. Fields and 



along roadsides. Summer and fall. 

 Philadelphia— On and about ballast (P.). 



Burlington — Moorestown (Br.). Crt7??d!e/i — Camden, ballast (C). 

 Monmouth— Freehold (C). 



New Castle— lOth and Rodney Streets, Wilmington, Canby. 



2. Leontodon nudicaule (L.) Porter. M. p. 893. Ballast. Summer and 



fall. 



5. PICRIS L. 

 1. PiCRis HIERACIOIDES L. M. p. 894. Waste places and ballast. Summer. 

 P7itZade;2'''^«— Greenwich Point (Te.). Delaware — Vp\)er Providence 

 (Fu.). Northampton— Seif\eriiyi\]e (P.). 



