4i6 FAUNA AND FLORA OF PALESTINE. 



ORDER CXXIV., POTAME^. 



1. Zannichcllia pahistris. L. Sp. 1475. Horned Pondweed. 

 Lake Phiala, Huleh marshes. Area, almost world-wide. 



2. Potamogeton nutans. L. Sp. 182. Broad-leaved Pondweed. 

 Stagnant waters ; general. Area, temperate and sub-tropical regions. 



3. Potamogeton lucens. L. Sp. 183. Shining Pondweed. 



Lake Yamouni, Lebanon. Area, Europe, Siberia, India, North 

 Africa, North America. 



4. Potamogeton crispus. L. Sp. 183. Curly Pondweed. 



In waters in the north. Area, Europe, Siberia, Japan, North India, 

 the Cape, North America, Australia. 



5. Potamogeton densus. L. Sp. 182. Opposite-leaved Pondweed. 

 In water, Lebanon district, etc. Area, Central and Southern Europe, 



North Africa, North America. 



6. Rnppia spiralis. L'Herb. Dum. Fl. Belg., p. 164. Tassel 

 Pondweed. 



Salt pools on the coast. Area, all shores, temperate and tropical. 



ORDER CXXV., NAIADACE^. 



I. Naias graminea. Del. Fl. Eg., p. 2i77^ pl> 5°) f- 3- 

 Ditches, plain of Sharon. Area, North Italy, Africa, India and 

 islands, Japan, generally with rice. 



ORDER CXXVL, LEMNACE^. 



1. Lemna minor. L. Sp. 1376. Duckweed. 



In ditches; general. Area, temperate and tropical regions. 



2. Wolffia hyalina. (Del. 111., No. 877.) 

 In stagnant waters. 



