Triglochin. JUNCAGINACE^. 261 



I. TRIGLOCHIN. Linn. ; Endl. gen. 1039. ARROWHEAD. 



[From the Greek, Ireis, three, and glochis, a point ; the capsales being mostly S-pointed,] 



Perianth somewhat colored, deciduous. Stamens 6 ; anthers sessile, one under each concave 

 leaf of the perianth, extrorse. Ovary of 3 - 6 united carpels, of which the alternate ones 

 are sometimes abortive, and thus appearing 3 - 6-celled ; the stigmas as numerous as the 

 fertile cells. Ovules solitary, arising from the base of the cell. Fruit 3 - 6-coccous. — 

 Marsh plants with scape-like stems. Leaves narrow, flattish or semiterete, sheathing at 

 the base. Flowers small, in a terminal spike. 



1. Triglochin palustre, Linn. Miatsh Arrow-grass. 



Root somewhat fibrous ; leaves semiterete, much shorter than the scape ; fruit slender and 

 clavate, tricoccous, carpels subulate at the base. — Linn. sp. 1. p. 338 ; Engl. hot. t. 366 ; 

 Pursh, fl.l. p. 247 ; Nutt. gen. 2. p. 237 ; Torr. fl. \. p. 373 ; Beck, hot. p. 379 ; Hook, 

 ft. Bor.-Am. 2. p. 168 ; Kunth, enum. 3. p. 143. 



Root perennial ? Leaves all radical or nearly so, very narrow, somewhat fleshy. Scape a 

 foot or eighteen inches high, slender. Flowers in a long spike ; the pedicels erect, filiform, 

 2-3 lines long, naked at the base. Fruit linear, attenuated below, crowned with three short 

 recurved points, finally separating at the apex into 3 slender carpels, and suspended on a 

 filiform axis. 



Marshes around Onondaga lake {Pursh); near Niagara (Mr. Cooper); Junius, Seneca 

 county {Dr. Sartwell) ; near BuflFalo {Dr. Kinnicutt). Fl. August. 



2. Triglochin maritimum, Linn. Seaside Arrow-grass. 



Leaves semicylindrical, fleshy, shorter than the scape ; fruit ovate, sulcate, of 6 united 

 oblong carpels, the angles of which are not projecting. — Linn. sp. 1. p. 338; Engl. hot. 

 t. 253 ; Michx. fl. 1. p. 208 ; Pursh, fl. 1. p. 247 ; Torr. fl. 1. p. 373 ; Bigel. fl. Bost. 

 p. 142; Beck, hot. p. 379 ; Hook. fl. Bor.-Am. 2. p. 168; Kunth, enum. p. 145. 



Root horizontal, perennial. Leaves radical, 6-12 inches long, rush-like, sheathing at the 

 base. Scapes 12 - 18 inches high, stouter than in the preceding species. Flowers on pedicels 

 1-2 lines long, greenish. Fruit sometimes ovate, 6-pointed at the summit, consisting of six 

 carpels united to a central axis, and not suspended from its summit. 



Salt marshes on the Island of New-York, and on Long Island. Also about Salina {Mr. 

 Cooper). Fl. July - August. 



