FLORA OF ADEN. 
83 
Stamens as many as petals or twice as many, inserted on the disk or out- 
side at its base. Ovary 2-5-celled ; ovules 2 in each cell. 
XV. Rhamnacece . — Branchlets or stipules often spinescent. Leaves 
simple, alternate. Flowers small, regular. Calyx 5-cleft, valvate in hud. 
Disk lining the calyx-tube. Ovary immersed in disk. Drupe fleshy. 
XVI. Vitacea. — Climbing. Leaves alternate; stipules small. Flow- 
ers in cymes, regular. Calyx small, truncate. Petals 4, valvate in bud. 
Stamens opposite to petals, inserted below the margin of the disk. Fruit 
a berry. 
XVII. Moringacece . — Leaves deciduous, alternate, bi- or tri-pinnate ; 
pinnse and leaflets opposite, glands at base of petioles and pinnae. Flowers 
large, bisexual, pentamerous. Petals unequal. Fertile stamens 5, 
opposite to petals, alternating with sterile stamens. Fruit a long 1-celled 
3-valved capsule. 
G. — Calycijlorce. 
Calyx usually gamosepalous, often adnate to ovary. Petals distinct* 
arising from the calyx or from a perigynous disk. Stamens perigynous 
or epigynous. Ovary usually inferior or included within the calyx-tube. 
XVIII. Leguminosce . — Leaves stipulate, as a rule alternate and com- 
pound. Flowers bisexual, in the majority of cases zygomorpbic. Petals 
5. Stamens 10 or oo Carpel 1, free. Ovules usually numerous, 
attached to the inner suture. Fruit a 1-celled pod. 
XIX. Combretacea . — Leaves simple, entire ; stipules 0. Flowers 
bisexual, regular. Calyx-tube adnate to ovary and produced beyond it, 
segments 5, valvate. Petals 0. Stamens 10, perigynous. Fruit angled 
or winged. 
XX. Loasacea (Kissenia). — Leaves alternate. Stipules 0. Flowers 
in leafy cymes, bisexual. Flower-tube adnate to ovary, 10-ribbed, limb 
5-lobed. Petals 10, perigynous, deciduous. Stamens indefinite, arranged 
in 5 bundles. Ovary inferior, 3-celled. Fruit bristly, 10-ribbed. 
XXI. Lythraceoe (Lawsonia). — Leaves opposite, entire Flowers in 
panicled cymes. Calyx cup-shaped, persistent, 4-lobed. Petals 4, 
inserted at the base of the calyx-tube, imbricate and crumpled in bud. 
Stamens 8, inserted in pairs on the calyx -tube. Ovary superior. 
XXII. Gucurbibacea . — Mostly climbers with tendrils. Leaves scat- 
tered. Flowers diclinous or polygamous. Petals 5, often gamopetalous. 
Stamens 5, epipetalous ; anthers usually long and sinuous. Ovary 
inferior, unilocular becoming spuriously multilocular. Fruit baccate, a 
pepo or succulent berry. 
XXIII. Ficoidta (Aizoacese). — Leaves opposite, alternate or pseudo- 
verticillate, simple. Stipules 0 or scarious. Flowers usually cvmose or 
