Crass II. MONOCOTYLEDONS. 
Orper CXX. HYDROCHARIDEZ, 
Flowers mostly unisexual. Perianth of 3-6 segments, 
either all petal-like or the 8 outer smaller and herbaceous, 
with a tube adherent to the ovary in the females ; without 
any tube in the males. Stamens 3-12. Ovary inferior, 1- 
celled, with 3 parietal placentas, or 3-, 6-, 9-celled; styles 3, 
G6, or 9, with entire or 2-fid stigmas. Fruit small, ripening 
under water, indehiscent. Seeds several, without albumen.— 
Aquatic herbs. Leaves undivided. Flowers enclosed when 
young in an involucre or spathe of 1-3 leaves or bracts. 
1. LAGAROSIPHON, Harv. - 
Flowers dicecious.—Male: Spathe sessile, compressed, 2-fid, 
many-flowered ; flowers pedicelled. Perianth 6-parted, peta- 
loid, the outer segments larger. Stamens 6, 3 bearing anthers 
opposite the outer segment of perianth ; 3 antherless, filiform, 
alternate with them ; anthers 2-celled, 2-fid—Female : Spathe 
sessile, oblong, compressed, 2-fid, 1-flowered ; flowers sessile. 
Perianth-tube very long, filiform ; limb 6-parted. Stamens 6, 
abortive, filiform, short. Ovary inferior, 1-celled, with 3 pari- 
etal placentas; ovules few, erect; style connate with the 
perianth-tube, and as long; stigmas 3, 2-parted; lobes mam- 
millate. Pericarp membranous, 2—3-seeded. Seed cylindrical. 
— Harv.in Hook. Lond. Journ. Bot. 1842, p. 230. t. 22. 
LL. mnioides is a lacustrine and river plant, wholly submerged, branch- 
ing, 1—2 ft. long, slender, pellucid. Leaves alternate, opposite or whorled, 
linear-attenuate, 1-nerved, serrulate. Flowers axillary.—Eastern district. 
Orper CXXI. SCITAMINE, 
Flowers hermaphrodite, irregular. Perianth superior, of 
9 segments in 3 series; outer (calyx) herbaceous, rarely 
petaloid, tubular or spathaceous ; inner of 6 unequal pieces 
in 2 series, united into a tube; upper larger hooded or ex; 
panded. Staminodes united to the tube of the inner perianth. 
Stamen 1, epigynous; filament free, usually dilated and 
petaloid and winged; anthers of 2 parallel, introrse cells, ad- 
nate to the face of the filament. Ovary 3-celled; style fili- 
2a 2 
