86 
FLORA OF ADEN. 
connate below. Ovary stipitate. Fruit indehiscent, enclosed in the 
persistent perianth tube. 
XLI. Hlecebracea (Cometes). — Leaves opposite. Stipules minute. 
Flowers 8 together, only the central one perfect, surrounded by ferrugin- 
ous bracts. Perianth herbaceous, 5-partite. Stamens 5, alternating with 
staminodes. Utricle enclosed in perianth. 
XLII. Amarantacea. — Leaves alternate or opposite, entire. Stipules 
0. Flowers usually bisexuah Perianth of 5 persistent sepals, imbricate 
in bud. Stamens opposite the sepals. Ovary free, 1-celled. Seed 1 ; 
embryo horseshoe-shaped or annular. 
XLIII. Chenopodiacea. — IjQ&ves alternate, rarely opposite, simple. 
Stipules 0. Flowers small, usually green, bi- or uni-sexual. Perianth of 
3-5 sepals. Stamens opposite the sepals. Fruit a utricle, generally en- 
closed in the perianth. Seed 1 ; embryo curved, annular, or spiral. 
XLIV. Aristolochiacece. — Leaves alternate. Stipule 0. Flowers 
bisexual. Perianth inflated below, with a trumpet-shaped mouth. Ovary 
inferior ; placentas parietal. Ovules numerous. Capsule 12-ribbed. 
XLV. Loranthacece. — Parasitic on stems and branches. Leaves op- 
posite, sub-opposite or alternate. Flowers regular, in 4-6-flowered umbels. 
Perianth double. Stamens equal to and opposite the petals. Ovary 
inferior, 1-celled ; ovule 1. Fruit baccate. 
XLVI. Eujohorbiacece.-'-hQVLves in most genera alternate, undivided 
and stipulate. Flowers as a rule unisexual. Perianth calycine, some 
genera with petals. Ovary superior, as a rule of 3 carpels, more or less 
united. Styles 3. Ovules 1 or 2 in each cell, pendulous from the inner 
angle. 
XLVII. Urticacea (Forskohlea) . — Leaves alternate, dentate. 
Stipules lateral, free. Flowers unisexual, monoecious, aggregated. 
Perianth 3-lobed in male flowers, absent in female. Stamen I. Achenes 
enclosed in involucre, enveloped in wool. 
Second Sub-class— Monocotyledons, 
Embryo with a single cotyledon. Vascular bundles arranged in a 
scattered manner in the stele, without cambium. Foliage leaves usually 
with parallel venation. 
XLVIII. Hydrocharitacea ( Halophila). — Salt-water herbs. Leaves 
in pairs or solitary, undivided. Flowers 1 -sexual, monoecious, enclosed in 
spathes. Male flowers : sepals 3, stamens 3. Female flowers : sepals 8, 
petals 0. Fruit a beaked utricle. 
XL1X. Scitaminacece (Musa). — Easily recognized by the enormously 
long leaves, which reach several feet. 
