ALISMA. 357 



mens. Female fl. with many 1-seeded compressed carpels 

 forming a head, upon a globose receptacle. — L. sagittate. 



Suborder II. BUTOMEiE. 



Three inner perianth-segm. petal-like ; three outer herbaceous 

 or sUghtly coloured. Seeds many, minute. Placenta ramified 

 over the inner surface of each carpel. Embryo straight or 

 cm-ved ; radicle next the hile. 



4. BUTOMUS. Perianth-segm. 6, all coloured, resembling a 

 corolla. Stam. 9. Carpels 6, connected below. 



Suborder III. JUNCAGINE.^. 



Perianth uniform, herbaceous, inconspicuous, or 0. Seeds 1 — 2, 

 erect, close together and at the base of the carpel. Embryo 

 straight; radicle next the hUe; plumule coming through -o. 

 lateral cleft in the embryo. 



5. ScHEucHZBRiA. Perianth of 6 reflexed leaves. Stam. 6, 

 "with slender filaments. Ovaries 3. Stigma sessile, downy. 

 Carpels compressed, inflated, diverging, 1 — 2-seeded, free. 



6. Tkiglochin. Perianth of 6 erect deciduous leaves. Stam. 

 6; anth. almost sessile. Ovaries 3 — 6. Stigmas sessile, 

 feathery. Carp, attached to an angular axis, from wliich 

 they at length separate at the base. 



Suborder I. Alismoidete. 

 1. Alis'ma Linn. Water-Plantain. 



1. A. Plantdgo (L.) ; fl.-stalk panicled with whorled compound 

 branches, carp, ranged in a circle compressed blunt obovate, style 

 below the top of inner edge of carp., 1. cordate-ovate or lanceolate 

 E. B. 837. -H. vii. t. 67. — L. aU radical, on long stalks. Sub- 

 mersed 1. linear. Fl.-stalks 2 — 3 ft. high. Fl. pale rose-colour. 

 Sep. ovate-obiong, styles twice as long as ovary, — 0. A. lanceo- 

 lata (With.) ; 1 . lanceolate narrowed below. Sy. E. B. 1438. 

 Sep. ovate, styles equalling the ovary. Perhaps distinct. — By 

 water. P. VU. VUI. E.S.I. 



2. A. ranuneuloides (L.) ; fl.-stalks umbellate, carp, angular 

 acute forming a globose squamose head, style terminal, 1. linear- 

 lanceolate acute.— -S. B. 326. R. vii. t. 65.— L. all radical, on 

 long stalks. Fl.-stalks from 3 to 24 in. long, ending in 1 or 2 

 umbellate whorls of simple peduncles. Fl. pale purple.— j3. A. 



