Triglochin 



JUNCAGINACEAE 



85 



o 50 



Map 102 



Triglochin maritima L. 



form that rarely fruits, and, according to Clark, (Lake Maxinkuckee 2: 



173. 1920), grows on muddy bottoms in deeper water than the species. 



Md., Ohio, Ind., 111., Iowa, Idaho to Oreg., and northw. into Canada. 



2. Najas guadalupensis (Spreng.) Morong. Map 100. This species is 

 found in lakes and is restricted to our lake area. I have never taken notes 

 concerning the habitats of this or the preceding species, but all that I have 

 collected were found on sandy or marly bottoms in less than 4 feet of 

 water. 



Basin of the St. Lawrence River to Minn., and Oreg., southw. to Fla. 

 and Mex., W. I., and S. A. 



3. Najas gracillima (A. Br.) Morong. (Najas gracillima (A. Br.) 

 Magnus of Gray, Man., ed. 7 and Britton and Brown, Illus. Flora, ed. 2.) 

 Map 101. This species was reported in 1876 by Schneck as found in the 

 "deeper ponds" of the Lower Wabash Valley. Our only specimens were 

 collected in 1935 by Kriebel in Lawrence County. 



Maine, N. Y., Wis., and Minn., southw. to Mass., Conn., N. Y., Ind., and 

 Mo. 



14.*JUNCAGINACEAE Lindl. Arrow-grass Family 



Stem scapose; leaves all radical; flowers bractless, many, in a spikelike raceme; 



ovaries 3-6, united until maturity 66. Triglochin, p. 85. 



Stem leafy; flowers bracteate, few, in a loose raceme; ovaries 3, nearly distinct, 



divaricate 67. Scheuchzeria, p. 86. 



66. TRIGLOCHIN [Riv.] L. Arrow-grass 



Fruit oblong or ovoid, mostly 3-6 mm long and 2-3.5 mm wide, rounded at the base; 

 carpels 6 (rarely 3 but none seen in Indiana), not beginning to separate first at 

 the base 1. T. maritima. 



Fruit linear or clavate, mostly 7-8 mm long, about 1 mm wide, tapering to a narrow 

 base; carpels 3, separating first at the base 2. T. palustris. 



