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
Shrubs or trees. Leaves alternate, undivided, exstipulate. Flowers
regular, hermaphrodite. Sepals 5, free or nearly so. Petals 5, free or
united below. Stamens 5, hypogynous. Disc none. Ovary superior, sessile
or short-stalked, 1-celled or incompletely 2-5-celled. Style simple;
stigma entire or lobed. Ovules numerous, ascending or horizontal,
inverted, with a single coat. Fruit a loculicidal capsule. Seeds with
a hard albumen and a small embryo situated near the hilum. (Under
_SAXIFRAGACEAE_.) (Plate 61.)
Genus 1, species 35. Tropical and South Africa and Canary Islands. Some
are used as ornamental plants. =Pittosporum= Banks
FAMILY 98. CUNONIACEAE
Shrubs or trees. Leaves opposite or whorled, stipulate. Flowers in
spike-, raceme-, or panicle-like inflorescences, hermaphrodite. Sepals
4-5, free or united at the base. Petals 4-5. Stamens 8-10, inserted
beneath the disc. Ovary superior, 2-3-celled; ovules 2 or more to each
cell. Styles 2-3, free. Fruit capsular. Seeds albuminous.--Genera 3,
species 17. South Africa, Madagascar and neighbouring islands. (Under
=SAXIFRAGACEAE=.) (Plate 62.)
1. Calyx valvate in bud. Petals 3-cleft or 3-toothed, shorter than the
calyx. Disc perigynous, deeply 4-5-lobed. Connective acuminate. Ovary
2-celled, with 2 pendulous ovules in each cell. Trees. Leaves of 3
leaflets. Stipules free. Flowers in panicles.--Species 1. South Africa
(Cape Colony). =Platylophus= Don
Calyx imbricate in bud. Disc 8-10-lobed. Stipules united in pairs.
Flowers in clusters arranged in spikes or racemes. 2
2. Disc perigynous, adnate to the base of the ovary. Stamens 10. Ovary
2-celled, with numerous ovules. Seeds compressed, with a narrow wing.
Leaves compound, with 3 or more leaflets.--Species 1. South Africa.
Yields timber. =Cunonia= L.
Disc hypogynous, free from the ovary. Seeds hairy.--Species 15.
Madagascar and the neighbouring islands. Some species yield timber,
tans, dyes, and medicaments. (Plate 62.) =Weinmannia= L.
FAMILY 99. MYROTHAMNACEAE
Balsamiferous shrubs. Leaves opposite, folded fan-like, undivided,
stipulate. Flowers in spikes, dioecious, without a perianth. Stamens
3-8; connective produced into a point; anthers attached at the base,
opening by lateral slits; pollen-grains cohering in groups of four.
Ovary lobed, 3-4-celled. Ovules numerous, inverted. Styles 3-4, free,
short and thick, with broadened stigmas. Fruit capsular or separating
into 2-4 nutlets. Seeds with copious albumen. (Under _HAMAMELIDEAE_ or
_SAXIFRAGACEAE_.)
Genus 1, species 2. Tropical and South Africa. The resin is used
as a fumigant and in medicine. (Including _Myosurandra_ Baill.)
=Myrothamnus= Welw.
FAMILY 100. BRUNIACEAE
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