FLORA OF ADEN. 
87 
L. Amaryllidaceee . — Flowers bisexual, epigynous. Perianth hexa- 
merous, petaloid. Stamens 6. Ovary of 3 carpels, trilocular. Fruit a 
loculicidal capsule. 
LI. Liliacece. — Flowers bisexual. Perianth in 2 series, imbricate in 
bud, hypogynous. Stamens 6. Ovary 3-celled ; style 1. Ovules 
attached to the inner angle of the cells. 
LII. Commelinacea (Commelina). — Flowers hypogynous. Sepals 8, 
membranous. Petals 3, one larger. Stamens 3, perfect, and 2-3 imper- 
fect. Ovary 3-celled. 
LIII. Palma . — Stem solid. Leaves pinnately or palmatelv divided. 
Inflorescence with sheathing bracts. Calyx and corolla of 3 segments 
each. Carpels 3. 
LIV. Naiadacea (Cymodocea). — Submerged marine plants. Leaves 
with stipular sheaths. Flowers unisexual or bisexual. Perianth 0. 
Male flowers with 2 stamens. Female flowers : 2 carpels, 1 ovule. Fruit 
of 2 ovoid carpels. 
LY. Gy per ace a, — Flowers hypogynous, usually diclinous. Stamens 3. 
Ovary di- or tri-merous, unilocular. Fruit an achene ; pericarp not 
adherent to seed. Tubular leaf-sheaths ; stem usually angular and solid. 
LYI. Graminea. — blowers hypogynous, usually bisexual, surround- 
ed by pales and lodicules. Stamens usually 3 ; anthers versatile. Ovary 
monomerous, unilocular. Fruit a caryopsis with an inseparable pericarp. 
Stem usually hollow. 
Second Class — Gymnospe rms . 
Flowers unisexual. Perianth none or incomplete. Ovules free, not 
enclosed in an ovary, fertilized by the pollen tube entering the micropyle 
or a tube formed by the integument. Seeds naked ; embryo straight 
with copious endosperm. 
LVII. Gnetacecc (Ephedra).— Climbing shrubs. Dioecious or 
monoecious. Branches often fascicled. Male flowers in short bracteate 
spikelets, which are in pairs or 3 together ; perianth of 2 sepals. Female 
flowers consisting of 1 ovule with a single integument. Fruit fleshy 
with 2 seeds. 
