310 FLORA OF PHILADELPHIA. 



Leaves, at least their midribs, hirsute. 3. L. hirsuta. 

 . Leaves entire or dentate, none of them pinnatifid. 



Leaves oblong or oblong-lanceolate; achene longer than 

 the beak. 4. L. sagittifolia. 



Leaves lanceolate; achene about equalling the beak. 



2. L. Canadensis. 

 Achenes beakless of with short necks, thickish ; flowers blue. 

 Leaves oblong to ovate, acuminate, dentate. 5. L. villosa. 

 Leaves pinnatifid, the terminal segment commonly triangular. 



6. L. Floridana. 

 Pappus brown; flowers blue to white. 7. L. spicata. 



1. Lactuca virosa L. Prickly Lettuce. M. p. 898. Waste grounds and 



roadsides. Summer. 



Philadelphia— Germantowri (Me.), flat below Philadelphia, L. L. Smith 

 (B. Sm.), Pairmount Park (Wn.). Bucks — Seliersville, Quakertown 

 (Pr.), New Hope (Ws.). Montg ornery— Shannonville (Cr.), Lafayette 

 (Wn.). Chester— V alley Porge (Ja.). Lancaster— Peach Bottom (Ca.). 

 Northampton— Ea&pn, Porter (B. C). 



Camden— Kaighn 's Point (Ja.) (Wn.) (Li.). Gloucester— Eepaupo 



(Li.). 

 New Castle— McCollough Iron Co., Jackson and Sharp, 7th and Church. 



2. Lactuca Canadensis L. Wild Lettuce. M. p. 898. Moist, open places. 



Summer and fall. 

 2a. Lactuca Canadensis Montana Britton. M. p. 898. Moist, open places. 

 Summer and fall. 

 Bucks — Point Pleasant, Dr. N. L. Britton (Pr.). 



3. Lactuca hirsuta Muhl. M. p. 898. Dry soil. Summer. 



Philadelphia— Byberry, Mart. (B. C). 'Bucks— Near Seliersville (Pr.). 

 •'• ' Biitlington — Vincentown (C). Cape May — Anglesea (Li.), Wildwood 

 (Wn.). Atlantic— Atlantic City (C.).' Monmouth— Spring Lake (C), 

 Asbiiry Park (Wn.). 



4. Lactuca sagittifolia Ell. M. p. 898. Dry, open soil. Summer. 



Philadelphia— Byberry, Mart. (B. C). Bucks— Near Seliersville (Pr.), 

 Solebury (Ws.). Delaware— Lansdowne (Pe.), Swarthmore (Pr.). Lan- 

 caster— (P.). Northampton— Easton, Porter (B. C). 



Gloucester — Mickleton, frequent (He.), Swedesboro (Li.). Monmouth 

 —Sandy Hook (C), Asbury Park (Wn.). 

 New Castle— Summit Bridge, etc., Commons. 

 & Lactuca villosa Jacq. M. p. 899. Thickets. Summer. 

 >)f , Philadelphia— Byberry, Mart. (B. C). Bucks— Bock Hill (Pr.), Sole- 

 Vmiry (Ws.). Montgomery— Shannonville (Cr.). Delaware— Mineral Hill 

 (He.), Valley of Darby Creek, Dr. Geo. Smith (B. Sm.), Concord (W. 

 Tr.). Lancaster,— York Furnace (P.). 



Gloucester— Swedesboro (Li.). Somerset— Bocky Hill (C). Hunter- 

 don — Bosemont (C). 

 New Castle— Prequent. 

 6. Lactuca Floridana (L.) Gaertn. M. p. 899. Eich soil, Summer. 



Bucks— Argus (Pr.). Delaware— Near Coopertown, Dr. Geo. Smith 

 (B. Sm.). Chest er — M ortonville (St.), Doe Run (Wn.). Lancaster— 

 (P.). Northampton— (P.). 



