ALISMACE/E. 
317 
each cell, erect or ascending. Placenta sutural. Embryo cy- 
lindrical, doubled upon itself, radicle next the hilum. 
1. Alisma. Fl. perfect. Cal. of 3 leaves. Pet. 3. Stam. G. 
Carp, numerous, 1 -seeded, not bursting. 
2. Actinocarpus. Fl. perfect. Cal. of 3 leaves. Pet. 3. 
Stam. 6. Carp. 6 — 8, 2-seeded, combined at the base and 
spreading in a radiant manner. 
3. Sagittaria. Fl. monoecious. Cal. 3-leaved. Pet. 3. 
Male fl. with numerous stam. Female fl. with numerous 
1-seeded compressed carpels upon a globose receptacle. 
Suborder II. BUTOME^. 
Three inner segments of the perianth petaloid. Seeds nume- 
rous, minute. Placenta ramified over the inner surface of each 
capsule. Embryo straight or curved, radicle next the hilum. 
4. Butomus. Perianth 6-parted, coloured, resembling a 
corolla. Stam. 9, 3 interior. Caps. 6, connected below, 
bursting inwards. 
Suborder III. JUNCAGINE^E. 
Perianth uniform, herbaceous, or 0. Seeds 1 — 2, erect, ap- 
proximated at the base. Embryo straight, radicle at the oppo- 
site end from the hilum, plumule coming through a lateral cleft 
in the embryo. 
5. Scheuchzeria. Perianth of C leaves. Stam. 6, with 
slender filaments. Ovaries " with 2 ovules." Style 0. 
Stigma adnate to the ovary, downy. Caps, compressed, in- 
flated, diverging 1- "or 2-" seeded. 
6. Triglochin. Perianth of deciduous leaves. Stam. 6, anth. 
almost sessile. Ovaries 3 — 6, with single ovules. Style 0. 
Stigmas feathery. Caps, attached to an angular axis from 
which they at length separate at the base. 
Suborder I. Alismoidece. 
1. Alisma Linn. 
1. A. Plantago (L.) ; fl. -stalk panicled with whorled com- 
pound branches, carp, rounded at the end not awned with 1 or 
2 striae on the back, fr. depressed obtusely trigonous, 1. cordate- 
ovate or lanceolate. — E. B. 837. — L. all radical, on long stalks. 
Flower-stalk 2 — 3 feet high. Fl. pale rose-colour. — /3. lanceo- 
latum (Sm.) ; 1. lanceolate attenuated below. A. lanceolata 
With.— By water. P. VII. VIII. Great Water -plantain. 
