ARALIACEAE. 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. tenellum. 



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

 Carpels rough or tubereulate. 



Floral leaves ovate or lanceolate, serrate. 4. M. heterophyllv/ni. 



Floral leaves linear, pectinate. 5. M. pinnatuvi. 



1. Myriophyllum verticillatum L. M. p. 666. 



Biicks—CP.). 



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



mer. 

 Oceaw— Point Pleasant (Br.) (St.). Monmouth— S)Y)ving Lake (Wn.). 



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



Summer. 



Lancaster — York Furnace (He.). 



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

 enton (Ja.) (U. C. S.). Gloucester— V^eatyille, I. Burk (He.). Salem — 

 Riddleton (Li.). Cape May — Wildwood (He.). Monmouth — Deal, A. H. 

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



4. Myriophy'LLUm heterofhyllum Michx. M. p. 666. Ponds. Summer. 



Bucks — Near Quakertown (Fr.). 



Atlantic — Hammontun (C). 



Netv Castle— Canal Coves, etc.; Delaware City, Commons and Tatnall. 



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



Summer. 



Gloucester — ^weAesboTo (Li.), Westville (Wn.). iSaiem. — Riddleton 

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

 -Freehold (C). 



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



Older '23. UMBELLALES. 



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

 Fruit a fleshy berry or drupe. Fam. 1. Araliaceae. 



Fruit dry when mature, splitting into two mericarps. 



Fam. 2. Umbelliferae^ 

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



Fam. 3. Cornaceae. 



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. 



1. ARALIA L. 



Umbels numerous, panieled or racemose. 



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



Branching unarmed herb; leaflets thin, large, cordate. 2. A. racemosa. 



