•&UBIACEAE. 299 



1. Houstonia coerulea L. Bluets, Innocence, Quaker Ladies. M. p. 861. 



Moist and grassy places. Spring. 



2. Houstonia longifolia Gaertn. M. p. 862. Dry, open places. Summer. 



Philadelphia — Fairmount Park (Gi.). Bucks — (P.). Delaware — 

 Swarthmore, sporadic (Fr.). Chester — West Chester, Joshua Hoopes 

 (Fu.). Lancaster— York Furnace (Cr.) (Le.). Berks— (P.). North- 

 ampton— (P.). Dauphin— Harrisburg (Ca.), Paxtang (Mar.), Steelton 

 (Wn.). 



Ocean— Manchester (C). 



2. OLDENLANDIA L. 

 i. Oldenlandia uniplora L. Clustered Bluets. M. p. 862. Low grounds. 

 Summer. 

 Burlington— Union Hall, Burlington (C). Camden— Banks of Dela- 

 ware (C), Camden, Mart. (B. C), Kaighn's Point, I. Burk (Fu.). 

 Gloucester— Westville, Duck Pond, I. Burk, and near Miekleton (He.), 

 Swedesboro (Li.). Salem— Elsinboro (C), Riddleton (Cr.) (He.) (Wa.). 

 Cumberland— Sea Breeze (C). Cape May— Cape May (Cr.), Ocean City 

 (He.), .Five-mile Beach (Le.). Atlantic — Atlantic City (Pr.). Ocean— 

 Manchester (C), Forked River (Wn.), Monmouth— North Spring Lake, 

 , Como, Brielle (C). 



New Castle— ToWnsend, Commons. 



3. CBPHALANTHUS L. 

 1. Cbphalanthus occiDBNTALis L. Button-bush. M. p. 863. Swamps 

 and along streams. Summer. 



4. MITCHELLA L. 

 1. Mitchella repbns L. Partridge-berry. M. p. 863. Woods. Spring. 



5. DIODIA L. Button-weed. 



Leaves linear-lanceolate ; style entire ; stigmas capitate. 1. D. teres. 

 Leaves lanceolate or oval ; style 2-cleft ; stigmas filiform. 2. D. Virginiana. 



1. Diodia teres Walt. M. p. 864. Dry or sandy soil. Summer. 



2. Diodia Virginiana L. M. p. 864. Moist soil. Summer. 



Philadelphia — Navy Yard, naturalized, Dr. Geo. Smith (Fu;). 

 Cape May— Cape May. 



6. GALIUM L. Bedstraw. 



Fruit dry, smooth, hispid or roughened. 

 Annuals (except Nos. 1 and 2). 



Flowers yellow; leaves narrowly linear. 1. G. verum. 



Flowers white or greenish-white. 



Fruit smooth or glabrous. 2. G. Mollugo. 



Fruit granular or tubercled, not bristly. 3. G. tricorne. 

 Fruit densely bristly-hispid. 4. G. Aparine. 



Perennials. 



Fruit bristly-hispid (or becoming glabrous in No. 8). 



Leaves in 4's, 1-nerved. 5. G. pilosum. 



Leaves in 4's, 3-nerved. 



Leaves lanceolate, oval or ovate; flowers in open cymes. 



