Scheuchzeria. ALISMACE^. 199 



8. TEIGLOCHIN, Linn. Arbow-gbass. 



Flowers perfect, in a naked slender raceme upon a seape-like peduncle ^vitl, an 

 herbaceous deciduous perianth of 3 small concave sepals and as many s.m.lar pe as. 

 Stamens 3 or ; anthers oval, nearly sessile. Ovary 3-6-celled, wrth sessde sfg- 

 mas and solitar; ovules, separating at maturity from the centra a.,s rnto as many 

 d Let pods. Led anatropous, erect ; testa membranons. Embryo straight, w.th 

 mini Lluded plumule. _ Marsh perennial herbs, with iibrous roots, radical 

 sheathing terete or semiterete fleshy leaves, and erect scapes. 



A genu, of abonl a dozen species, of «hich the t>vo following are the more com.non and wnlely 



'""l" T maritimum, Linn. Rather stout, a span to 2 or 3 feet hi^h : leaves 



sist-peuil, U to%Viines long and about equalling the pedicels. - Eochenb. 

 'T;rl':r<;,,7rf '.to^f S.,„ F,..nci.o to Alaska »n.. the Aro«c Ocean, and in »hne 



i„I,„r'Se'-;"Sai.^^:^,lt\el r tS« 3-»^^^^^ 



9. SCHEUCHZERIA, Limi. 

 Flowers perfect, in a loose few-fiowered bracteate raceme, with small herbaceous 

 persistent perianth of 3 oblong sepals and 3 narrower petals Stan.ens 6, with 

 C. blo,^ anthers on slender exserted filaments. Ovary of 3 nearly dxst.nct 

 ovoS 1 -2-:vuled carpels, becoming divergent coriaceous subglobose pods, delnscing 

 ventrally : stigmas flat and sessile. Seeds ascending, anatropous, with coriaceous 

 testa. Embryo straight, thick. -A marsh perennial herb, with a creeping jointed 

 scariously sheathed rootstock, ascending flexuous simple stems, and sheathing chan- 

 nelled teretish leaves. A single species. 



1 S palustris,Linn. Stems a span high or less : leaves exceeding them, pitted 



odor of hydrochloric acid. 



Order CXV. ALISMACE^. 



Marsh herbs, with scape-like stems, sheathing leaves, and perfect or unisexual 

 flowers; perianth of 3 herbaceous persistent sepals and as many often conspicuous 

 white deciduous petals, which are imbricate or (in Alisma) involute in the bud ; 

 stamens 6 or more, included; ovaries numerous, distinct, 1-celled and mostly 1- 



stamens b or more, inciuueu , uvcixi^o ^.^^.^^ --, , 



ovuled, becoming akenes in fruit ; seeds e«et, campylotropons. with meml™nous 

 testa; albumen none; embryo strongly recurved or "-"'»'— .l;""';/"^^"^;; 

 leaved radical, petiolate, and strongly nerved with trairsverse vemlets, the earher 



