AMACEAE. 89 



Family 1. ARACEAE Neck. Arum Family- 

 Flowers without a perianth. ,, 



Flowers monoecious or dioecious, borne at the base pf the spadix. 



1. Arisaema. 

 Flowers monoecious, covering the whole spadix. 2. Peltandra. 



Flowers with a perianth. 



Spadix enclosed in a shell-like fleshy spathe. 3. Spathyema.. 



Spadix naked, terminating the scape. 4. Orontium. 



Spadix naked, borne at the base of a leaf -like spathe. 5. Acorus. , 



1. ARISAEMA Mart. < ' ' ' ! 



Spathe hooded, open at the throat, enclosing the spadix. 



Hood of spathe striped; spadix stout, club shaped. 1. A. triphyllum* 

 Hood of spathe deep brown to black; spadix slender,, cylindric. 



2. A. pusillum. 



Spathe convolute; summit of the spadix exserted., 3. A. Bracontium. 



1. Arisaema triphyllum (L.) Torr. Jack-in-the-Pulpit, Indian Turnip. 



M. p. 229. Kieh woods. Spring. 



2. Arisaema pusillum Peck. M. p. 229. Shaded bogs. Spring. 



Montgomery— Flat Eock (Br.). Chester— W. Bradford (St»). Lan- 

 caster — Christiana (St.). ••'" : ■ ' ' 



Burlington— Medford (Br.). Camden— Clementon (Br.), Haddonfield 

 (St.). Gloucester— Tomlin (St.). Ocean — Point Pleasant (Wn.). 



3. Arisaema Dracontium (L.) Schott. Green Dragon, Dragon-root. M. 



p. 230. Wet woods and along streams. Spring. 



Philadelphia— Below Schuylkill, Mart. (B. C), Chews Woods, (Je.), 

 Robinson Knoll (Te.). Sucks — Sellersville (Fr.), Neshaminy (Re.). 

 Montgomery— Peikiomen (Cr.), Sumneytown (Ke.), Ivy Rock (Wn.). 

 Delaware — Ridley and Crum Creeks, Darby (Fit.), Lansdowne (He.) 

 (Pe.) (Wn.)", Haverford College (Le.), Swarthmore' (Pe.) (Sa.) (Wn.), 

 Media (Sa.), Valley of Darby Creek (B. Sm.), Chester (W. Tr.). Ches- 

 ter—Chester Valley near Malvern, Valley Forge' (Le.). 1 Lehigh— Low- 

 lands, Coplay (Kr.). Dauphin— Steelton (Wn.). 



Burlington — Bordentown (C.j. Camden — Haddonfield (C.)". Hun- 

 terdon — Holland Station, Ridge Island, High Bridge (C). 



New Castle— Mount Cuba (Ha.) (Ke.), Wilmington (Wn.), near 

 Granogue, Red Clay Creek, etc. 



2. PELTANDRA Raf. 



1. Peltandra Virginica (L.) Kuntze. Arrow Arum. M. p. 230. Swamps 

 and shallow water. Early summer. 



3. SPATHYEMA Raf. 



1. Spathyema foetida (L.) Raf. Skunk Cabbage. M. p. 231. Bogs or 

 moist ground. Early spring. 



, 4. ORONTIUM L. 



1. Orontium aquaticum L. Golden, Club. M. p. 231. Swamps and 



ponds.. Spring. 



Philadelphia— Byberry, Mart. (B. C), Neck (Cr.),' Holmesburg Junc- 



' tion (Ws.).. r Bucks— Rock Hill (Fr.), Sellersville (Wn.). Montgomery 



—Sumneytown (VP.). Delaware— Tinicum, Dr., Geo. Smith (B. Sm.), 



