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
Fruit dehiscing in two valves. (See 54.) =Brassica= L.
77. (45.) Fruit indehiscent, transversely divided into 2-7 cells
(joints), the lowest cell sometimes seedless. 78
Fruit not transversely septate, but sometimes prolonged into a seedless
beak. 82
78. Fruit 3-7-jointed, oblong, flat. Style rather long. Seeds solitary
in each cell, pendulous. Sepals erect or connivent, the lateral
saccate. Stem very short. Leaves radical, lyrate. Flowers solitary,
axillary. (See 57.) =Cossonia= Durieu
Fruit 2-jointed. Flowers racemose. 79
79. Fruit compressed, the lower joint with a pendulous, the upper
with an erect seed. Stigma sessile. Radicle accumbent. Lateral sepals
saccate. Petals pale-violet or rose-coloured.--Species 1. North Africa.
Used medicinally. =Cakile= Gaertn.
Fruit not essentially compressed. Radicle incumbent. Cotyledons folded.
Petals white or yellow. 80
80. Upper joint of the fruit with a partition and an erect seed;
lower joint 1-2-seeded or seedless. Sepals spreading. Leaves
pinnatipartite.--Species 7. North Africa; one species also naturalized
in South Africa. (Including _Ceratocnemon_ Coss. et Balansa, _Didesmus_
Desv., _Otocarpus_ Durieu, and _Rapistrella_ Pomel). =Rapistrum= Desv.
Upper joint of the fruit without a partition, one-seeded; lower joint
seedless. Sepals not saccate. Petals white. 81
81. Upper joint of the fruit tubercled, beaked. Seed erect or pendulous
from the top of the cell. Cotyledons not lobed. Sepals suberect.
Filaments not toothed. Leaves lobed.--Species 2. North-west Africa.
(Including _Kremeria_ Coss.). =Muricaria= Desv.
Upper joint of the fruit ribbed or smooth, not beaked. Seed pendulous
from the long, ascending funicle. Cotyledons 2-lobed. Sepals
spreading.--Species 7. North and East Africa. Some are used as
vegetables (sea-kale). =Crambe= L.
82. (77.) Fruit prolonged into a broad beak. Radicle incumbent. Petals
yellow, often marked with violet veins. 83
Fruit not distinctly beaked. 87
83. Fruit indehiscent, 1-or 3-celled, with a single perfect seed and
usually a rudimentary one below it. Seed oblong. Herbs. Leaves toothed,
lobed, or cleft. 84
Fruit dehiscing in 2 valves, completely or incompletely 2-celled, with
2 or more seeds, but the seed of one cell sometimes rudimentary (in
this case shrubs). Seeds globose or nearly so. Cotyledons folded. 85
84. Fruit 1-celled, with an oblique, sword-shaped beak.--Species 1.
North-east Africa (Egypt). =Schimpera= Hochst. & Steud.
Fruit 3-celled, with a broad, hollow, chambered beak.--Species 1.
North-west Africa (Algeria). =Myagrum= L.
85. Fruit with 2 seeds. Longer filaments united in pairs. Small shrubs.
Leaves entire.--Species 1. North-west Africa. =Vella= L.
Fruit with 6 or more seeds. Filaments free. Herbs. Leaves divided, at
least some of them. 86
86. Fruit with 6-8 seeds and a leaf-like beak. Leaves twice pinnately
dissected.--Species 1. North Africa. =Carrichtera= Adans.
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