224 88. CRUCIFERAE 



Styk'-apex notched beneath the stigma. Petals usually yellow. — Species 

 25. Some are used as vegetables or in medicine. (Including Kihera 

 fJC. and N astiirtiopsis Boiss. Sisymbrium L. 



73. Fruit with a flat, shar])-edgcd beak, dehiscing in two valves. Seeds 



globular. Herbs with lyrate leaves 74 



Fruit with a cyhndrical or conical, terete or slightly flattened beak, or 

 without a beak 75 



74. Fruit-valves with a single strong longitudinal nerve. Seeds in 2 rows. 



Sepals converging. Fruits erect, pressed against the stem. — Species 4. 

 North Africa and northern East Alrica. The seeds are used as a condi- 

 ment or in medicine. (Including Rytidocarpus Coss.) . Eruca Lain. 

 Fruit -valves with 3 longitudinal nerves. Seeds in i row. Sepals spreading. 

 (Sec 52.) Sinapis L. 



75. Seeds oblong. Fruit-valves with a strong midrib. Lateral sepals saccate. 



Petals yellow. Undershrubs. Leaves undivided. — Species 6. Madeira 



and Cape Verde Islands. (Under Brassica L.) Sinapidendron Lowe 



Seeds globular, sometimes slightly flattened. Herbs 76 



76. Fruit indehiscent, spongy. Leaves lyrate. (See 57.) . Rhaphanus L. 

 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 



yS. Fruit 3 — 7-jointed, oblong, flat. Style rather long. Seeds sohtary 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 i. 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 



I — 2-seeded or seedless. Sepals spreading. Leaves pinnatipartite. — 

 Species 7. North Africa ; one species also naturalized in South Africa. 

 (Including C eratocnemon 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 



8t. 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. (In- 

 cluding Kremeria Coss.) Muricaria Desv. 



