230 FLORA OF PHILADELPHIA. 



Family 1. TH7MELEACEAE Keichenb. Mezereon Family. 

 1. DIRCA L. 

 1. DiRCA PALUSTRis L. Leatherwood, Moosewood. M. p. 646. Damp, rich 

 woods. Spring. 

 Philadelphia — Bartram's Garden (Pe.). Bucks — Near Doylestown 

 (Fr.). Chester— (P.). Lancaster— (P.) . Berks— (P.). Northampton 



-(P.). 



Gloucester— 'iii ear Swedesboro (Li.). jSo^em — Woodstown (He.), Salem 

 (Wa.). Mercer— Assanpink Creek (C). 



New Castle — Brandywinc Creek, north side above Market Street and 

 above Rockford, Tatnall; Mount Cuba, Canby. 



Family 2. ELAEAGNACEA.E Lindl. Oleaster Family. 

 1. ELAE AGNUS L. 

 1. Elaeagnus argentea Pursh. Silver-berry. M. p. 647. Escaped from 

 cultivation. Summer. 



Elaeagnus latifolia L. Escaped from cultivation and natural- 

 ized. 

 DeZau'a?'e— Upper Darby, Upper Providence (B. Sm.). 



Order 22. MYRTALES. 



Land or marsh plants, or if aquatic, submerged leaves not dissected. 



Calyx-tube merely enclosing the ovary, but free from it, except at the 

 base. 

 Anthers longitudinally dehiscent. Pam. 1. Lythraceae. 



Anthers opening by terminal pores. Fam. 2. Melastomaceae. 



Calyx-tube almost wholly adnate to the ovary. Fam. 3. Onagraceae. 

 Aquatic or amphibious herbs, the submerged leaves dissected. 



Fam. 4. Haloragidaceae. 



Family 1. LYTHRACEAE Lindl. Loosestrife Family. 



Calyx-tube cnmpanulate or hemispheric ; flowers regular. 



Flowers small, axillary, solitary or few; low herbs. 1. Rotala. 



Flowers large, in axillary cymes ; large aquatic shrubs. 2. Decodon. 



Calyx-tube cylindrie; flowers regular. 3. Lythrum. 



Calyx-tube tubular, oblique ; flowers irregular. 4. Parsonsia. 



1. ROTALA L. 



1. Rotala ramosior (L.) Koehne. M. p. 649. Swamps. Summer. 



Delaware — Tinicum, Dr. Geo. Smith (Fu.) (B. Sm.). Chester— (P.). 

 Lot? caster— Columbia (Wn.), 



Burlington — Burlington (C). Salem — Sharptown (Wn.). Cape May 

 —Woodbine (Br.). 



New Castle — Wilmington (Pr.), Barley Mill Dam, etc. Frequent. 



2. DECODON J. F. Gmel. 

 1. Decodon verticillatus (L.) Ell. Swamp Loosestrife. M. p. 649. 

 Swampy grounds. Summer. 

 Bucks— Penn Valley (Fr.). Delaware— Valley of Darby Creek (B. 



