The flowering plants of Africa: An analytical key to the genera of African phanerogramsThonner, Franz
Science
The flowering plants of Africa: An analytical key to the genera of African phanerograms
Thonner, Franz
Angiosperms -- Africa; Plants -- Africa
69. Calyx 3-lobed. Stamens 1-3; filaments free at the top, connective
not broadened. Ovary 3-4-celled. Styles united high up. Fruit a
capsule. Seeds with a large outgrowth at the hilum. Flowers in
panicles.--Species 3. Central Africa. =Maprounea= Aubl.
Calyx 4-5-parted. Stamens 2-3; filaments united into a short column.
Anthers turned outwards. Ovary 2-3-celled. Fruit a capsule or a drupe.
Seeds without an outgrowth. 70
70. Calyx-segments broad. Connective broadened, peltate. Styles united
high up. Flowers in panicles.--Species 2. Tropics. =Omphalea= L.
Calyx-segments narrow. Connective not broadened. Styles free or
united at the base. Flowers in spikes.--Species 2. Central Africa.
=Excoecariopsis= Pax
71. Calyx of the male flowers 2-3-toothed or-lobed. Inflorescence
terminal. Bracts with two glands. Flowers monoecious. 72
Calyx of the male flowers 2-5-parted. Fruit a capsule with a persistent
central column. 73
72. Ripe carpels separating from a 3-parted central column. Seeds
without an outgrowth.--Species 10. Tropical and South Africa. They
yield timber; one species (_S. sebiferum_ Roxb.) is cultivated for its
oily seeds. (Including _Conosapium_ Muell. Arg.). =Sapium= P. Browne
Ripe carpels separating from the base of the pericarp, leaving no
central column. Seeds with an outgrowth at the hilum.--Species 5.
Tropical and South Africa. Some are poisonous. =Stillingia= L.
73. Seeds with an outgrowth at the hilum. Flowers monoecious.
Inflorescences terminal or terminal and lateral. Leaves
alternate.--Species 3. Central Africa. (_Cnemidostachys_ Mart.)
=Sebastiania= Spreng.
Seeds without an outgrowth at the hilum. Flowers usually dioecious.
Inflorescences usually lateral.--Species 20. Tropical and South Africa.
Some are poisonous or are used as ornamental plants. (Including
_Taenosapium_ Muell. Arg.) =Excoecaria= L.
74. (66.) Flowers in racemes, monoecious, with a disc. Sepals of the
male flowers evidently united below. Stamens 10, free. Leaves palmately
divided, sometimes alternating with undivided ones.--Species 3.
Cultivated in the tropics. _M. Glaziovii_ Muell. Arg. yields rubber,
_M. utilissima_ Pohl and _M. dulcis_ Pax (cassava or mandioc-plants)
furnish vegetables, medicaments, and edible roots, from which meal,
starch (tapioca), and a spirituous drink are prepared. =Manihot= Adans.
Flowers in glomerules, dioecious, rarely monoecious, but then without a
disc. Sepals of the male flowers free or nearly so. Leaves undivided.
[Tribe GELONIEAE.] 75
75. Sepals 5. Filaments free. Male flowers without a disc and
without a rudimentary pistil.--Species 6. Tropical and South Africa.
(_Ceratophorus_ Sond., including _Suregada_ Roxb.) =Gelonium= Roxb.
Sepals of the female flowers 7-8, the inner petaloid. Filaments
united.--Species 1. West Africa. =Chaetocarpus= Thwait.
76. (1.) Calyx of the male flowers with valvate aestivation. Stamens
5-7. Male flowers with a rudimentary pistil. Shrubs or trees. 77
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