90. ALISMACE^. 
345 
Order XC. ALISMACE^. 
Periantli free, of 6 leaves ; 3 inner or all coloured. Stam. 
6 — 9 or more. Ovaries 3 — 6 or many, always distinct or ulti- 
mately separable ; carp, opening at the suture or not at all ; 
seeds 1 or many. Embryo straight or curved ; albumen 0. — 
See G. F. G. Monocot ii. 
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. Ajlisma. F1. perfect. Stam. 6. Carp. 7nany, forming a 
ring or head, small, 1-seeded, not bursting. " 
2. AcTiNOCARPTJS. Fl. perfect. Stam. 6. Carp. 6 — 8, rather 
large, 2-seeded, combined at the base and spreadiiig in a 
radiant manner. 
3. Sagittabia. Fl. monoecious. Male fl. with many sta- 
mens. Female fl. with many l-seeded compressed carpels 
forming a head, upon a globose receptacle. 
Suborder II. BUTOME^. 
Three inner perianth-segm. petal-like. Seeds many, minute. 
Placenta ramified over the inner surface of each carpel. Em- 
bryo straight or curved ; radicle next the hile. 
4. BiTTOMrs. Perianth-segm. 6, aU coloured, resembling a 
coroUa. Stam. 9. Carpels 6, connected below. 
Suborder HI. JUNCAGINE^. 
Perianth uniform, herbaceous, inconspicuous, or 0. Seeds 1 — 
2, erect, close together and at the base of the carpel. Embrj'o 
straight ; radicle next the hile ; plumule coming through a 
lateral cleft in the embryo. 
5. ScHETJCHZEHiA. Perianth of 6 reflexed leaves. Stam. 6, 
with slender filaments. Ovaries 3. Stigma sessile, downy. 
Carpels compressed, inflated, diverging, 1 — 2-seeded. 
6. Tbiglochin'. Perianth of 6 erect deciduous leaves. Stam. 
6; anth. almost sessile. Ovaries 3 — 6. Stigmas sessile, 
feathery. Carp, attached to an angular axis from which 
they at length separate at the base. 
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