286 
Class II. 
MONOCOTYLEDONES or ENDOGENjE. 
Stems with no distinction of bark wood and pith, desti- 
tute of medullary rays, consisting of cellular tissue amongst 
which the vascular tissue is mixed in bundles, increasing 
by the addition of new matter at the centre. Leaves 
mostly alternate and sheathing with parallel simple veins 
connected by smaller transverse ones. Cotyledon one, or 
if more they are alternate. 
Subclass I. FLORIDA. 
Floral envelopes whorled. 
Order LXXVII. HYDROCHARIDE^E. 
Sep. 3, herbaceous. Pet. 3, regular, coloured. Stam. epigy- 
nous. Ovary solitary, inferior ; placentas parietal, sometimes 
projecting into the centre of the ovary. Stigmas 3 — 6. Fr. dry, 
or succulent, not bursting, 1- or spuriously many-celled. Seeds 
numerous. Albumen 0. Embryo straight, cylindrical. Radicle 
at the opposite end from the hilum, 
1. Hydrocharis. Dioecious. Cal. 3-parted. Pet. 3. Male 
with 9 — 12 stamens in 3 rows surrounding 3 abortive styles. 
Fern, with 3 abortive filaments and 3 fleshy scales surround- 
ing the 6 deeply bifid styles. Caps, inferior, 6-celled, many- 
seeded. 
2. Stratiotes. Dioecious. Cal. 3-parted. Pet. 3. Male 
with 12 or more stamens surrounded by numerous abortive 
ones. Fem. with 6 deeply bifid styles. Berry inferior, 
6-celled, many-seeded. 
1. Hydrocharis Linn. 
1. H. Morsiis-rance (L.). The only species. — E. B. 808. St. 
44. 16. — Floating upon the water. Creeping. L. stalked, round- 
ish-reniform, entire. Fl. white, delicate, springing from a pel- 
lucid membranous sheath. Seeds covered with beautiful promi- 
