168 FLORA OF PHILADELPHIA. 



Family 1. PODOSTEMACEAE Lindl. Biverweed Family. 



1. POD08TEMON Michx. 



1. Podostemon Cekatophttllum Michx. Rimer-weed. M. p. 472. Shallow 

 streams. Summer. 

 Philadelphia — Byberry, Mart. (B. C). Bucks ,— Nockamixon (Fu.) 

 (Fr.). Delaware— Concord (W. Tr.)- Chester— (P.). Lancaster— Tw-, 

 quan Island (P.). Northampton — (P.). 

 New Castle — Bed Clay Creek, Brandywine Creek, etc; Frequent. 



Family 2. CRASSULACEAE DC. Orpine Family. 



Stamens of the same number as the sepals, minute herbs. 1. Tillaea. 



Stamens twice as many as the sepals; succulent herbs. 2. Sedum. 



1. TILLAEA L. 

 1. Tillaea aquatica L. Pigmy-weed. M. p. 473. Muddy river banks. 

 Summer. 

 Philadelphia— (P.). . < i" 



New Castle— Above railroad bridge, Camby. 



2. SEDUM L. 



Cyme regular, compound, the flowers not secund; leaves broad, flat. 



Flowers dioecious, mostly 4-parted. 1. 8. roseum. 



Flowers perfect, 5-parted. 2. 8. Telephium. 



Flowers secund along the branches of the cyme. ' • ' 



Petals yellow. 3. 8. acre. 



Petals white. 4. 8. ternatum. 



1. Sedum eosedm (L.j Scop. Soseroot. M. p. 474. Rooky places. Spring. 



Bucks — Noekamixon. 



2. Sedum Telephium L. Garden Orpine. M. p. 474. Escaped from culti- 



vation. Summer. 



3. Sedum acre L. Mossy Stonecrop. M. p. 474. Escaped from cultiva- 



tion, rocks and roadsides. Summer. 



4. Sedum teknatum. Stonecrop. M. p. 474. Rocky woods; also escaped 



from cultivation. Spring. 

 S Bucks — Buckingham, Mart. (B. C), Narrowsville (Li.). Delaware — 

 Glen Mills (Fu.), Burmont (Mac), "Valley of Darby Creek, probably in- 

 troduced (B. Sm.). Chester— Westtown (Le.) (Sts.), Goshen Twp. (Pr.). 

 Lancaster— York Furnace. Dauphin— Steelton (Wn.). 

 New Castle — Rockford, introduced. 



Family 3. PENTHORACEAE Rydb. Ditch Stonecrop Family. 



1. PENTHORITM L. 

 1. Penthobum sedoides L. Ditch Stonecrop. M. p. 475. Open, wet 

 places. Summer. 



