triglochin SCHEUCHZERIACE.E 677 



SCHEUCHZERIA 



segments in 2 series. Stamens 3-6, with short or elongated 

 filaments and mostly 2-celled extrorse anthers. Carpels 3-6, 

 1- or 2-ovnled, more or less united until maturity. Seeds ana- 

 tropous, without albumen. Embryo straight. 



1 Triglochin Leaves all radical : flowers bractless, in a spike-like raceme 

 terminating a jointless scape : ovaries 3-6, united until maturity. 



% Scheuchzeria Flowers bracteate in a loose raceme upon a leafy stem : 

 ovaries 3, nearly distinct, at length divergent. 



1 TRIGLOCHIN L. Sp. 338. 



Perennial herbs with all radical terete or semiterete ligulate 

 leaves with membranous sheaths, and perfect flowers in a naked 

 raceme upon a scape-like peduncle. Perianth herbaceous, decidu- 

 ous, of 3 small concave sepals and as many similar petals. Sta- 

 mens 3 or 6, with oval nearly sessile anthers. Ovaries 3-6-celled 

 with sessile stigmas and solitary ovules, separating at maturity 

 from the central axis into as many distinct carpels. Seeds ana- 

 tropous, erect, with membranous testa. Embryo straight, with 

 minute included plumule. 



T. maritima L. Sp. 339. Rootstock without stolons, often sabligne- 

 ous, the caudex thick, mostly covered with the sheaths of former leaves: 

 scapes stout, nearly terete, %-2 feet high: leaves semiterete, usually 

 about 1 line wide, shorter than the scape : raceme elongated, often 16 

 inches or more long : pedicels decurrent, 1-1 % lines long : segments of the 

 perianth 6, each with a large sessile anther at its base : pistil of 6 united 

 carpels: fruit oblong or ovoid, 23^-3 lines long, obtuse at base, with 6 re- 

 curved points at the summit : carpels 3-angled. In saltmarshes and saline 

 places, California to Alaska and across the continent: also in Europe. 



T. palnstris L. Sp. 338. Rootstock short, oblique, with slender fu- 

 gaceous stolons: leaves linear, shorter than the scapes, 5-12 inches long, 

 tapering to a sharp point: scapes striate, 8-20 inches high: racemes 5-12 

 inches long: pedicels capillary, in fruit erect-appressed, V/^-Z lines long: 

 perianth segments 6, greenish-yellow : anthers 6, sessile : pistil of 3 united 

 carpels : stigmas sessile : fruit linear or clavate : ripe carpels separating 

 from the axis and becoming suspended from its apex, the axis 3-winged. 

 In bogs, Idaho to Alaska and the northern Atlantic States : also in Europe. 



2 SCHEUCHZERIA L. Sp. 338. 



Bog perennials with creeping rootstocks, erect leafy stems flat- 

 ish leaves and small flowers in a loose terminal raceme. Perianth 

 of 3 oblong sepals and 3 narrower petals. Stamens 6, with linear- 

 oblong anthers and slender exserted filaments. Ovary of 3 nearly 

 distinct ovoid 1-2-ovuled carpels, becoming divergent coriaceous 

 subglobose follicles, dehiscing ventrally. Stigmas flat, sessile. 

 Seed ascending, anatropous, with coriaceous testa. Embryo 

 straight, thick. 



S. palnstris L. Sp. 338. Stems solitary or several together, usually 

 clothed at the base with the remains of old leaves, 4-10 inches high : leaves 

 5-15 inches long, exceeding the stem, the uppermost reduced to bracts: 

 pedicels 3-10 lines long, spreading in fruit : flowers white, few, in a loose 

 terminal raceme : segments of the perianth membranaceous, 1-nerved, \%. 

 lines long : filaments 2-4 lines long : seeds oval, brown, 2^-3 lines long, 



