ARROW-GRASS FAMILY. 
1. Triglochin palustris I. Marsh Arrow- 
grass. (Fig. 184.) 
Triglochin palustris I,. Sp. Pl. 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 short ; 
scapes I or 2, slender, striate, 8’-20’ high; racemes 
5/-12/ long ; pedicels capillary, in fruit erect-appressed 
and 214//-3'5’’ long; perianth-segments 6, greenish- 
yellow; anthers 6, sessile; pistil of 3 united carpal, 
3-celled, 3-ovuled; stigmas sessile; fruit 3//-314’ 
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. Alsoin Europe and Asia. July-Sept. 
FIN & 
G oe: LS 
2. Triglochin striata R. & Pp. Three- 
ribbed Arrow-grass. (Fig. 185.) 
Triglochin striata R. & P. Fl. Per. 3:72. 1802. 
Triglochin triandra Michx. F1. Bor, Am.1: 208. 1803. 
Rootstocks upright or oblique. Scapes 1 or 2, 
more or less angular, usually not over 10’ high; 
leaves slender, slightly fleshy, nearly or quite as 
long as the scapes, %/’/-1/’ wide; flowers very 
small, light yellow or greenish, in spicate racemes; 
pedicels 4’/-1’’ long, not elongating in fruit ; per- 
janth-segments 3, stamens 3; anthers oval, large; 
pistil of 3 united carpels; fruit sub-globose or some- 
what obovoid, about 1/’ 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, Maryland to Florida and Louisi- 
ana. Also in tropical America. mee 
3. Triglochin maritima I,. Seaside 
Arrow-grass. (Fig. 186.) 
Triglochin maritima \,. Sp. Pl. 339. 1753+ 
Triglochin elata Nutt. Gen. 1: 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’-2° high; leaves half-cylindric, usually 
about 1/’ wide; raceme elongated, often 16’ or 
more long; pedicels decurrent, 1//-1%4’’ long, 
slightly longer in fruit; perianth segments 6, 
each subtending a large sessile anther; pistil of 
6 united carpels; fruit oblong or ovoid, 214//—3/’ 
long, 134//-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 fresh or saline 
marshes across the continent to Alaska and California, Also in E surope and Asia, July—Sept. 
