PIPER—FLORA OF THE STATE OF WASHINGTON. 99 
NAIADACEAE. 
Carpels several to each flower. ° 
Flowers perfect, peduncled; leaves opposite .............2..222.--- Ruppia. 
Flowers monoecious; leaves alternate..................-.-.------- ZANNICHELLIA. 
Carpels solitary; flowers monoecious or dioecious. 
Leaves opposite or whorled, denticulate _..-.-. 22.2.2. 222.2.-.--- Nalras. 
Leaves alternate, entire, long-linear. 
Monoecious; ovaries pendulous _......-... 2.22.2... 2222-2 --- ZOSTERA. 
Dioecious; ovaries ascending ................2....-.-2------- Pry LLospapix. 
RUPPIA. 
Sheaths 6 to 8 mm. long; fruit 2 mm. long...........2.2.-2-2..-2--- 1. R. maritima. 
Sheaths 12 to 30 mm. Jong; fruit 3 to 4 mm. long....222222 2.2222... 2. R. occidentalis. 
1. Ruppia maritima L. Sp. Pl. 1: 127. 1753. 
TYPE LOCALITY: European. ’ 
Rance: In brackish water, nearly cosmopolitan. 
SPECIMENS EXAMINED: Clallam County, Elmer 2797; Whidby Island, Gardner 348; 
Anacortes, Henderson, July, 1892; Ocosta, Henderson, June, 1892; Seattle, Piper 2863. 
2. Ruppia occidentalis S. Wats. Proc. Am. Acad. 25: 138. 1890. 
Type Locauity: ‘In saline ponds near Kamloops, British Columbia.’’ Collected by 
Macoun. 
Rance: British Columbia to Washington and Nebraska. 
SPECIMENS EXAMINED: Lake Chelan, Lake & Hull. 
ZANNICHELLIA. 
1. Zannichellia palustris L. Sp. P|. 2: 969. 1753. 
Type Locauity: ‘‘ Habitat in Europae, Virginiae fossis, fluviis.”’ 
Rance: Throughout most of North America. Europe. Asia. 
SPECIMENS EXAMINED: West Klickitat County, Suksdorf 2174; Junction Crab and Wil- 
son Creeks, Sandberg & Leiberg 264; Marshall Junction, Piper, July 2, 1896. 
NAIAS. 
1. Naias flexilis (Willd.) Rostk. K Schmidt, Fl. Sed. 384. 1824. 
Caulinia flerilis Willd. Abh. Akad. Berlin 95. 1803. 
Type LocaLity: European. 
Rance: Throughout most of North America. Europe. 
SPECIMENS EXAMINED: Green Lake, Piper; Lake Chelan, Elmer, September, 1897. 
ZOSTERA. 
1. Zostera marina L. Sp. Pl. 2: 968. 1753. EELGRAss. 
Zostera oregana Wats. Proc. Am. Acad. 26: 131. 1891. 
Type Locauity: ‘‘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. 
FEelgrass 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. 
