AKACEAE. 89 



Family 1. ARACEAE Neck. Arum Family. 



llowers without a perianth. 



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



1. Arisaema, 



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



Flowers with a perianth. 



ISpadix enclosed in a shell-like fleshy spathe. 3. Spathyemcu 



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. Dracontium. 



1. Arisaema "^triphyllum (L.) Torr. JacJc-in-the-Pulpit, Indian Turnip. 



M. p. 229. Rich woods. Spring. 



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



Mo7itgomery— Flat Eock (Br.). Chester— W. Bradford (St.). Lan- 

 caster — Christiana (St.). 



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

 (St.). Gloucester— Tornlin (St.). Oceaw— 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.), 

 Eobinson Knoll (Te.). 5«c/i:s— Sellersville (Fr.), Neshaminy (Re.). 

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

 Delaware— 'Ridley and Crum Creeks, Darby (Fu.), 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.). Lehigh — Low- 

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



Burlington — Bordentown (C). 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. Arroiv Arum. M. p. 230. Swamps 

 and shallow water. Early summer. 



3. SPATHYEMA Raf. 



1. Spathyema foetida (L.) Raf. Slunk 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— Byherr J, Mart. (B. C), Neck (Cr.), Holmesburg Junc- 

 tion (Ws.). Bucks— Boek Hill (Fr.), Sellersville (Wn.). Montgomery 

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



