ABALIACEAE. 235 



2. MYRIOPHYLLUM L. Water-milfoil. 



Carpels smooth. 



Flowers in emersed spikes. 



Floral leaves longer than the flowers, pinnatifid. 



1. M. verticillatum. 

 Floral leaves reduced to minute bracts. 2. M,. tenellvjm. 



Flowers on both emersed and submersed stems. 3. M. humile. 

 Carpels rough or tuberculate. 



Floral leaves ovate or lanceolate, serrate. 4. M. heterophyllum. 



Floral leaves linear, pectinate. 5i M. pinnatum. 



1. MYRIOPHYLLUM VERTICILLATUM L. M. p. 666. 



Bucks— (P.). 



2. Myriophyllum teNellum Bigel. M. p. 666. Borders of ponds. Sum- 



mer. 

 Ocean— Point Pleasant (Br.) (St.). Monmouth— Spring Lake (Wn.). 



3. Myriophyllum humile (Raf.) Morong. M. p. 666. Ponds and ditches. 



Summer. 



Lancaster— York Furnace (He.). 



Burlington— Pemberton (C). Camden— Camden, Mart. (B. C), Clem- 

 enton (Ja.) (U. C. S.). Gloucester— Westville, I. Burk (He.)- Salem— 

 Riddleton (Li.). Cape Ma^— Wildwood (He.). Monmouth— Deal, A. S. 

 Smith (Fu.), Freehold, Keyport (C). 



4. Myriophyllum hetekophyllum Michx. M. p. 666. Ponds. Summer. 



Bucks— Near Quakertown (Fr.). 



Atlantic — Hammonton (C). 



New Cast le— Canal Coves, etc.; Delaware City, Commons and Tatnall. 



i 



5. Myriophyllum pinnatum (Walt.) B. S. P. M. p, 666. Shallow ponds. 



Summer. 



Gloucester — Swedesboro (Li.), Westville (Wn.). Salem — Kiddleton 

 (He.) (Le.). Cape May— Cape May (He.), Wildwood (Li.). Monmouth 

 —Freehold (C). 



New Castle — Delaware City, Tatnall; Collins, Commons. 



Order 23. UMBELLALES. 



Stamens 5; styles 2-5, rarely united; flowers umbellate, capitate, or panicled. 

 Fruit a fleshy berry or drupe. Fam. 1" Ardliaceae. 



Fruit dry when mature, splitting into two mericarps. 



Fam. 2. ; Umbelliferite. 

 Stamens 4; style 1; stigma 1; shrubs and trees; flowers not umbellate. 



Fam, 3. Gornaceae. 



Family 1. ARALIACEAE , Vent. Ginseng Family. 



Herbs, shrubs, or trees; leaves alternate; decompound; styles 5. • 1. Aralia. 

 Herbs; leaves verticillate, digitately compound; styles 2 or 3. 2. Panax. 



-,'..' , ! :■ ■'..•• :■ -.-.i ..•"'-'•■y.l 



.. 1. ARALIA*L. . - ! ''" ! ' 



Umbels numerous, panicled or racemose. 



Spiny shrub or tree; leaflets thick, ovate. 1. A; spinjosa. 



Branching unarmed herb; leaflets thin, large, cordate. 2. At racem.osa. 



