6. Receptacles top-shaped, subsequently cupular, bearing many male flowers and a single central female flower. Pericarp membranous. Shrubs. Leaves undivided.--Species 5. Central Africa. =Trymatococcus= Poepp. & Endl. Receptacles expanded, often divided into linear segments, bearing many male flowers and several female ones. Pericarp crusty within, fleshy outside. Herbs or low shrubs.--Species 50. Tropics. Some are poisonous or used medicinally. (Plate 31.) =Dorstenia= L. 7. Female flowers solitary, axillary; male flowers in spike-like inflorescences. Perianth 4-toothed. Trees. Leaves undivided.--Species 1. Island of Réunion. Used medicinally. [Tribe STREBLEAE.] =Maillardia= Frapp. & Duchartre Female flowers in spike-or head-like inflorescences. 8 8. Female flowers in head-like, but sometimes elongated (oblong) inflorescences, the male in spike-, raceme-or head-like ones. Style simple, with a thread-shaped stigma, rarely with an abortive side-branch. Trees. [Tribe BROUSSONETIEAE.] 9 Female and male flowers in spike-like inflorescences. Perianth of the female flowers divided to the base. Style 2-parted, with thread-shaped, equal or subequal stigmas. [Tribe MOREAE.] 12 9. Male flowers in head-like inflorescences. Perianth of the female flowers 4-lobed. Spinous plants.--Species 1. East Africa and Madagascar. It yields a dye-wood and edible fruits. (Under _Plecospermum_ Trecul) =Cardiogyne= Bur. Male flowers in spike-or raceme-like inflorescences. 10 10. Male flowers in lax, raceme-like inflorescences. Spinous plants. Leaves entire. Perianth of the female flowers deeply 4-cleft, persistent and enclosing the fruit.--Species 1. Cultivated in North Africa. The wood is used for joiners’ work, the leaves as food for silkworms. =Maclura= Nutt. Male flowers in dense, spike-like inflorescences. Spineless plants. 11 11. Perianth of the female flowers deeply 4-cleft or 4-parted. Fruit wholly, or for the greatest part, enclosed by the perianth. Leaves undivided.--Species 2. Central Africa. They yield timber. =Chlorophora= Gaud. Perianth of the female flowers shortly toothed. Fruit overtopping the perianth. Leaves usually lobed.--Species 1 (_B. papyrifera_ Vent., paper-mulberry). Cultivated in North Africa. Used for making paper; the fruit is edible. =Broussonetia= Vent. 12. Stipules united. Leaves entire, with numerous transverse nerves. Ovary subglobose. Seed with leaf-like, folded cotyledons. Shrubs.--Species 2. Madagascar. =Pachytrophe= Bur. Stipules free. 13 13. Leaves entire, penninerved, leathery. Ovary compressed. Seed without albumen; embryo with thick cotyledons. Trees.--Species 2. Madagascar. =Ampalis= Boj. Leaves toothed, 3-nerved at the base. Ovary ovoid or subglobose. Seed with copious albumen.--Species 3. Cultivated and naturalized in various regions. They yield timber, food for silkworms, edible fruits (mulberries), dyes, and medicaments. =Morus= L.