130 History of Hingham. 



Gerardi, Loisel. Black Grass. 



tenuis, Willd. 



Greenii, Oakes & Tuck. 



pelocarpus, E. Meyer. 



acumiuatus, Mx. 



scirpoides, Lam. 



Canadensis, J. Gay. 



Canadensis var. longicaudatus, Engel. 



83. TYPHACEiE. (CAT-TAIL FAMILY.) 



An order of marsh herbs common to all portions of the earth. 

 The young shoots of some species are edible. The pollen is 

 inflammable, and used in fireworks. The flags, or leaves, are 

 made into chair-seats. One of the species is the Cat-o'-nine-tails. 



Typha, Tourn. 



latifolia, L. Cat-tail. 

 Sparganium, Tourn. 



simplex, Hudson. Bur-reed. 



simplex, Huds., var. androcladum, Engel. 



84. ARACE-5J. (ARUM FAMILY.) 



A large family, principally inhabiting the tropics. They are 

 mostly herbaceous, though some tropical species are shrubby. 

 Certain plants of the order are esculent, and others medicinal. 

 Some species are very poisonous, if eaten. 



Arisaema, Mart. 



triphyllum; Torr. Indian Turnip. 

 Peltandra, Raf. 



undulata, Raf. Arrow Arum. 



Calla, L. 



palustris, L. Water Arum. 



Symplocarpus, Salis. 



foetidus, Salis. Skunk Cabbage. 



Acorus, L. 



Calamus, L. Sweet Flag. 



85. LEMNACR5!. (DUCK-WEED FAMILY.) 



These are the simplest, and some species are the smallest, of 

 flowering plants. They float free on the top of the water, having 

 no stems. 



Lemna, L. 



trisulca, L. Duck-weed, 

 minor, L. 



Spirodela, Schleid. 



polyrrhiza, Schleid. 



