ARROW-GRASS FAMILY. 



j. Triglochin palustris L. Marsh Arrow- 

 grass. (Fig. 184.) 



Triglochin palustris L. Sp. PI. 338. 1753. 



Rootstock short, oblique, with slender fugacious 

 stolons. Leaves linear, shorter than the scapes, 5'- 

 12' long, tapering to a sharp point ; ligule very shdrt ; 

 scapes I or 2, slender, striate, S / -2O / high ; racemes 

 5 / -i2 / long ; pedicels capillary, in fruit erect-appressed 

 and 2)^ // -3>2 // long; perianth -segments 6, greenish- 

 yellow ; anthers 6, sessile ; pistil of 3 united carpels, 

 3-celled, 3-ovuled ; stigmas sessile ; fruit S"-^^" 

 long, linear or clavate ; ripe carpels separating from 

 the axis and hanging suspended from its apex, the 

 axis 3-winged. 



In bogs, New Brunswick to Alaska, south to New York, 

 Indiana and Montana. Also in Europe and Asia. July-Sept. 



2. Triglochin striata R. & P. Three- 

 ribbed Arrow-grass. (Fig. 185.) 



Triglochin striala R. & P. Fl. Per. 3: 72. i8oa. 

 Triglochin triandra Michx. Fl. Bor. Am. i: 306. 1803. 



Rootstocks upright or oblique. Scapes I or a, 

 more or less angular, usually not over !</ high; 

 leaves slender, slightly fleshy, nearly or quite a* 

 long as the scapes, W~\" wide; flowers very 

 small, light yellow or greenish, in spicate racemes; 

 pedicels y z "-\ ff long, not elongating in fruit ; per- 

 ianth-segments 3, stamens 3; anthers oval, large; 

 pistil of 3 united carpels; fruit sub-globose or some- 

 what obovoid, about i" in diameter, appearing 3- 

 winged when dry by the contracting of the car- 

 pels; carpels coriaceous, rounded and 3-ribbed on 

 the back; axis broadly 3-winged. 



In saline marshes, Man-land t. Florida and Ixraisi- 

 ana. Also in tropical America. June-Sept 



3. Triglochin maritima L. Seaside 

 Arrow-grass. (Fig. 186. ) 



Triglochin maritima L. Sp. PI. 339. 1753- 

 Triglochin elata Nutt. Gen. i: 237. 1818. 

 Triglochin maritima var. elata A. Gray, Man. Ed. 

 2, 437. 1852. In part. 



Rootstock without stolons, often subligneous, 

 the caudex thick, mostly covered with the 

 sheaths of old leaves. Scape stout, nearly 

 terete, 6 x -2 high; leaves half-cylindric, usually 

 about \" wide; raceme elongated, often 16' or 

 more long; pedicels decurrent, i"-iW long, 

 slightly longer in fruit ; perianth segments 6, 

 each subtending a large sessile anther ; pistil of 

 6 united carpels ; fruit oblong or ovoid, 2 / ^ // -3 // 

 long, \W-2" thick, obtuse at the base, with 6 

 recurved points at the summit ; carpels 3- 

 angled, flat or slightly grooved on the back, or 

 the dorsal edges curving upward and winged, 

 separating at maturity from the hexagonal axis. 



In salt marshes, along the Atlantic seaboard from Labrador to New Jersey and in fi 

 marshes across the continent to Alaska and California. Also m Europe and Asia 



