412 86. ALI8MA.CE.E. 



Suborder I. ALISMOIDE/E. 



Three inner perianth-segm. petal-like. Seeds 1 2 in each 

 cell, erect or ascending, on the suture. Embryo cylindrical, 

 doubled upon itself; radicle next the hile. 



1. ALISMA. Fl. perfect. Stain. 6. Carp, many, forming a 

 ring or head, small, 1-seeded, not bursting. L. ovate or 

 narrow. 



2. DAMASONIUM. FL perfect. Stam. 6. Carp. 6 8, rather 

 large, 2-seeded, combined at the base and spreading in a 

 radiant manner. L, cordate-oblong. 



3. SAGITTARIA. Fl. monoecious. Male fl. with many sta- 

 mens. Female fl. with many 1-seeded compressed carpel* 

 forming ahead, upon a globose receptacle. L. sagittate. 



Suborder II. BUTOME^l 



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

 or slightly coloured. Seeds many, minute. Placent i ramitied 

 over the inner surface of each carpel. Embryo straight or 

 curved ; radicle next the hile. 



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

 corolla. Stam. 9. Carpels 0, connected below. 



Suborder III. JUXCAGINE.E. 



Perianth uniform, herbaceous, inconspicuous, orO. Seeds 1 2, 

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

 straight; radicle next the hile; plumule coming through a 

 lateral cleft in the embryo. 



5. SCHEUCHZERIA. Perianth of 6 reflexed leaves. Stain. (>, 

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

 Carpels compressed, inflated, diverging, 1 2-seeded, fre>3. 



0. TRIGLOCHIN. Perianth of 6 erect deciduous leaves. Stam. 

 6; anth. almost sessile. Ovaries 3 l>. Stigmas sessile, 

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

 they at length separate at the base. 



