DICOTYLEDONOUS PLANTS 183 
whorls of 4 each, near the middle of the stem, and a pair or two 
opposite, thin, slender-petioled, 2-4 in. long, ovate-lanceolate, taper- 
pointed. Umbels usually 2, sometimes 1, with slender pedicels. 
Corolla-lobes very pale pink or whitish ; hoods white; horn short, 
stout, and bent inward. Dry woods and fence-rows. 
Il. HOYA, R. Br. 
Shrubby, more or less climbing, smooth, tropical plants. 
Leaves fleshy. Calyx 5-cleft, corolla 5-lobed, wheel-shaped, 
its divisions thick and with a waxy look. Crown of 5 spread- 
ing segments. Pollen-masses fastened by the bases. 
1. H. carnosa, R. Br. Wax Puiant. Stems long and slender, 
rooting and trailing. Leaves oval or nearly so, thick, dark green. 
Flowers in close umbels, pink or whitish, the corolla-lobes covered 
on the upper surface with minute projections. Cultivated from 
India as a house plant and in conservatories. 
82. CONVOLVULACEZ. MorninG-GLory FAMILY. 
Usually twining herbs or shrubs, often with milky juice. 
Leaves alternate (wanting in Cuscuta), without stipules. 
Flowers variously clustered, rarely solitary, often large and 
showy. Sepals 5. Corolla hypogynous, regular, tubular, bell- 
shaped or funnel-shaped ; its limb more or less 5-lobed or 
angled. Stamens 5, inserted on the corolla-tube. Ovary 
usually 2-4-celled ; style slender, 2-4-cleft; ovules 1 or 2 in 
each cell. Capsule 1-4-celled, 2-4-valved or bursting open 
across the base. 
I. CALYSTEGIA, R. Br. 
Twining, trailing, or nearly erect perennials. Leaves heart- 
shaped or arrow-shaped. Flowers peduncled, axillary and 
solitary. Calyx enclosed in 2 large, leaf-like, usually heart- 
shaped bracts ; sepals equal. Corolla bell-funnel-shaped, its 
border nearly or quite entire; style 1; stigmas 2. Pod 1-celled 
or partially 2-celled, 4-seeded. 
1. C. sepium, R. Br. CREEPERS, RuTLAND Beauty. Stem 
twining or sometimes extensively trailing. Leaves heart-arrow- 
