Igg FLOBA OF PHILADELPHIA. 



Family 1. PODOSTEMACEAE Lindl. Riverweed Family. 



1. PODOSTEMON Michx. 



1. PODOSTEMON Ceratophyllum Michx. Kiver-weed. M. p. 472. Shallow 

 streams. Summer. 

 Philadelphia — 'Bj'berTy, Mart. (B. C). i?wcA;s — Nockamixon (Fu.) 

 (Fr.). Delaware— Con&ordi (W. Tr.). Chester— {^P.). Lancaster— Iwc- 

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



New Castle— B,ed 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.) . 

 New Castle— Ahove railroad bridge, Canby. 



2. SEDUM L. 



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



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



Flowers perfect, 5 -parted. 2. S. Telephiiim. 



Flowers secund along the branches of the cyme. 



Petals yeUow, 3. S. acre. 



Petals white. 4. S. ternatum. 



1. Sedum roseum (L.) Scop. Eoseroot. M. p. 474. Rocky places. Spring. 



BucTcs — Nockamixon. 



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 ternatum. Stonecrop. M. p. 474. Rocky woods; also escaped 



from cultivation. Spring. 



^McA's— 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. Pattp/iiw— Steelton (Wn.). 



New Castle— 'Roekiord, introduced. 



Family 3. PENTHORACEAE Rydb. Ditch Stonecrop Family. 



1. PENTHOEUM L. 

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

 places. Summer. 



