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
36. Calyx-lobes unequal. Petals with a long claw. Stamens with a
glandular connective. Style long. Fruit long, wavy, indehiscent.
Leaflets small.--Species 1. Madagascar and Seychelles. =Brandzeia=
Baill.
Calyx-lobes subequal. Stamens with a glandless connective. Style
short. Fruit oblong, dehiscing by two valves. Seeds oblong. Leaflets
large.--Species 5. Tropics. They yield timber, tanning and dyeing
materials, medicaments, and poisons especially used in ordeals. “Sassy
tree.” (_Fillaea_ Guill. & Perr.). =Erythrophloeum= Afz.
37. (30.) Corolla of 6 petals, almost regular. Stamens 16-18. Ovary
sessile. Ovules 2. Leaves unifoliolate.--Species 2. West Africa to the
Great Lakes. They yield timber. =Baphiopsis= Benth.
Corolla reduced to a single petal or wanting. Ovary stalked. Ovules
more than 2. Leaves pinnate. 38
38. Receptacle (calyx-tube) very short, almost wanting. Petal 1. Fruit
linear.--Species 2. Tropics. Yielding timber. (_Tounatea_ Aubl.).
=Swartzia= Schreb.
Receptacle bell-shaped. Petals none. Fruit ovate.--Species 1 (_C.
africana_ Lour.). Central Africa. Yields timber, gum, edible fruits,
and medicaments. =Cordyla= Lour.
39. (29.) Leaves, at least some of them, twice pinnate. [Tribe
CAESALPINIEAE.] 40
Leaves all once pinnate, rarely simple. 52
40. Common petiole very short, ending in a spine; rachis of the
pinnae very long, flattened, leaf-like; leaflets very small. Stipules
spinous. Trees or shrubs. Calyx imbricate in bud. Petals 5, subequal,
yellow. Stamens 10. Ovules numerous. Fruit linear, tardily dehiscing
or indehiscent. Seeds oblong, placed lengthwise, albuminous.--Species
2, one of them a native of South Africa, the other naturalized in the
tropics. They yield timber, bast for paper-making, a substitute for
coffee, and medicaments, and serve also as garden-or hedge-plants.
=Parkinsonia= L.
Common petiole distinctly developed; rachis of the pinnae not
leaf-like. 41
41. Stem herbaceous or woody at the base only. Petals 5, subequal,
yellow. Stamens 10. Ovules numerous. Fruit dehiscing by two
valves, membranous or thin-leathery. Seeds transverse, ovoid,
exalbuminous.--Species 3. South Africa and southern Central Africa.
(_Melanosticta_ DC.) =Hoffmannseggia= Cav.
Stem woody throughout, shrub-or tree-like. 42
42. Flowers sessile, in elongate panicled spikes. Calyx 5-cleft, with
semiorbicular lobes. Petals 5, equal, oblong, much exceeding the calyx.
Stamens 10, unequal. Anthers basifixed. Ovules 2-3. Trees.--Species 1.
West Africa (Cameroons). =Stachyothyrsus= Harms
Flowers more or less stalked, in racemes or panicles. 43
43. Flowers polygamous. Calyx slightly imbricate in bud. Petals
3-5, subequal, white or greenish. Stamens 6-10. Seeds transverse,
albuminous. Trees. Leaves without stipules.--Species 2, one a native
of Central Africa, the other naturalized in North Africa. Used as
hedge-plants and yielding timber. =Gleditschia= L.
Flowers hermaphrodite. Stamens 10. 44
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