280 FLOE A OF PHILADELPHIA. 



2. KoELLiA ViRGiNiANA (L.) MacM. M. p. 801. Dry fields and thickets. 



Summer. 



3. KoELLiA VERTiciLLATA (Michx.) Kuntze. M. p. 801. Dry fields and 



thickets. Summer. 



Bucks — Bristol (Fr.). Lancaster — (P.). Northampton — Easton, 

 Porter (B. C). Dauphin— {P.) . 



Camden — Ancora (Li.), Lindenwold (VP.). Gloucester — Washington 

 Park (VP.). Atlantic— Elwood (C), Egg Harbor (Li.). Monmouth— 

 Freehold (C). 



New Castle— Greenhank, Commons. Frequent. 



4. KoELLiA CLINOPODIOIDES (T. & G.) Kuntze. M. p. 801. Dry soil. Late 



summer. 



Bucks— Point Pleasant (Fr.). Delaware— Y alley of Darby Creek (B. 

 Sm.). LaJicas^er— McCall 's Ferry (Ca.). Berks— (P.). Northampton 

 —Easton, Porter (B. C). 



Gloucester — Swedesboro (Li.). Hunterdon — Milltown (C). 



New Castle— Svrayne Station, W. & N. Railroad, Canby. 



5. KOELLIA ARISTATA (Michx.) Kuntze. M. p. 801. Dry pine-barrens. 



Summer. 

 Ocear)— Waretown (C). 



6. KoELLiA INCANA (L.) Kuntze. M. p. 802. Dry thickets. Autumn. 



7. KoELLiA MUTICA (Michx.) Britton. M. p. 802. Sandy soil. Summer. 



25. THYMUS L. Thyme. 



1. Thymus Serpyllum L. M. p. 802. Old fields and roadsides. Summer. 



26. CUNILA L. Dittany. 



1. CuNiLA ORIGANOIDES (L.) Britton. M. p. 803. Dry woods. Late sum- 

 mer. 



27. LYCOPUS L. Water Horehound. Bugleweed. 



Calyx-teeth 4 or 5, ovate, shorter than the nutlets. 



Leaves mostly ovate, usually purple; base of stem not tuberous. 



1. L. Virginicus. 

 Leaves mostly lanceolate to oblong; base of stem tuberous. 



2. L. communis. 

 Calyx-teeth mostly 5, lanceolate or subulate, longer than the nutlets. 



Bracts minute; corolla twice as long as the calyx. 



Leaves sessile. 3. L. sessilifolius. 



Leaves narrowed into a manifest petiole. 4. L. rubellus. 



Bracts lanceolate or subulate ; corolla not twice as long as the calyx. 



Leaves pinnatifid or deeply incised. 5. L. Americanus. 



Leaves ovate, coarsely dentate. 6. L. Europaeus. 



1. Lycopus Virginicus L. M. p. 803. Shady, moist places. Summer. 



2. Lycopus communis Bicknell. M. p. 803. Moist soil. Late summer. 



Lancaster — (P.). Northampton — (P.). 



3. Lycopus sessilifolius A. Gray. M. p. 804. Pine-barrens. Summer. 



Lancaster — (P.). 

 f,-.. Burlington— 'Batsto (C), Atsion. Gloucester— l>ieaT Mickleton (He.), 

 Swedesboro (Li.). jSaJem— Penn's Grove (C). Atlantic— tiear Green- 



