PIPER FLORA OF THE STATE OF WASHINGTON. 99 



NAIADACEAE. 



Carpels several to each flower. 



Flowers perfect, peduncled; leaves opposite Ruppia. 



Flowers monoecious; leaves alternate Zanniciikllia. 



Carpels solitary; flowers monoecious or dioecious. 



Leaves opposite or whorled, denticulate Naias. 



Leaves alternate, entire, long-linear. 



Monoecious; ovaries pendulous Zoster a. 



Dioecious; ovaries ascending Phyllospadix. 



RUPPIA. 



Sheaths 6 to 8 nun. long; fruit 2 mm. long 1. B. maritima. 



Sheaths 12 to 30 mm. long: fruit 3 to 4 mm. long 2. B. occidentalis. 



1. Ruppia maritima L. S[). PI. 1: 127. 1753. 

 Type locality: European. 



Range: In brackish water, nearly cosmopolitan. 



Specimens examined: Clallam County, Elmer 2797: Whidby Island, Gardner 348; 

 Anacortes, TIentle/'son, July, 1892; Ocosta, Henderson, June, 1892; Seattle, Piper 28(53. 



2. Ruppia occidentalis S. Wats. Proc. Am. Acad. 25: 138. 1890. 



Type locality: "In saline ponds near Kamloops, Britisli Columbia." Collected by 

 Macoun. 



Range: British Columi)ia to Washington and Nebraska. 

 Speclmens EX.\.MiNEt): Lake Ciiolan, LuJce i(' //(///. 



ZANNICHELLIA. 



1. Zannicheliia palustris L. Sp. Pi. 2: 909. 1753. 



Type locality: "Habitat in Europac, Virginiae fossis, fluviis." 



Range: Throughout most of North America. Europe. Asia. 



Speclmens ex.\mined: West Klickitat County, SuJcsdorf2\74; Junction Crab and Wil- 

 son Creeks, Samlherg tt' Leiberg 264; Marshall Junction, Piper, July 2, 1896. 



NAIAS. 



1. Naias flexilis (Willd.) Rostk. & Schmidt, Fl. Sed. 384. 1824. 

 Cauliniafe.rilis Willd. Abh. Akad. Berlin 95. 1803. 

 Type locality: European. 



Range: Throughout most of North Ameiica. Europe. 

 Speclmens e.xamined: Green Lake, Piper; Lake Chelan, Elmer, September, 1897. 



ZOSTERA. 



1. Zostera marina L. Sp. Ph 2: 968. 1753. Eelgrass. 



Zostera oregana Wats. Proc. Am. Acad. 26: 131. 1891. 



Type locality: "Habitat in mari Balthico, Oceano." 



Range: Seacoasts, Alaska to California and Greenland to Florida. Europe. Asia. 



Specimens examined: Grays Harbor, Henderson 2471; Orchard Point, Piper 2314. 



Eelgrass is very abundant at about low-tide mark all along the seashore, especially in 

 quiet water. Fruiting specimens are very rarely found. Better material for study is 

 much to be desired. 



