88. CRUCIFERAE 221 



46. Fruit traansversely divided into two or more fertile cells. Cotyledons 



folded : radicle incumbent. TSubtribe brassicinae.] .... 47 



Fruit not transversely septate, but sometimes produced into a seedless 



beak. 5g 



47. Fruit with 2 transverse cells (joints) 48 



Fruit with 3 or more transverse cells 56 



48. Upper joint of the fruit 3 — 4-seeded, flat. Seeds oblong. Petals 



yellow. Undershrubs. — Species i. North-west Africa (Morocco). 



Hemicrambe Webb^ 



Upper joint of the fruit i-seeded. 49 



40- Fruit-valves flat, usually i-nerved 50 



Fruit-valves convex 51 



50. Sepals connivent, the lateral saccate. Petals violet. Stigmatic lobes 



long, erect, connate. — Species 7. North Africa. . Moricandia DC. 

 Sepals spreading, not saccate. Stigmatic lobes short. Leaves pinnati- 

 partite. — Species ic. North Africa, northern Central Africa, and 

 Island of St. Thomas ; one species also naturalized in South Africa. 

 The seeds of some species are used as a condiment. . .Diplotaxis DC. 



51. Beak of the fruit flat, sharp-edged. Valves usually 3-nerved. ... 52 

 Beak of the fruit cylindrical or conical, terete or but slightly flattened. . 53 



52. Petals red. Lateral sepals saccate. Seeds ovoid. Fruits erect. Leaves 



dissected. — Species 2. North Africa. (Under Erucaria Gaertn.) 



Reboudia Coss. & Durieu 



Petals yellow or whitish with violet veins. Seeds globose. Leaves 



lyrate. — Species 5. North Africa, one species also cultivated in the 



Mascarene Islands. The white mustard (5. alba L.) yields salad, oil, 



condiments, and medicaments. (Under Brassica L.) . Sinapis L. 



53. Lower joint of the fruit indehiscent, narrower than the upper one, 3 — 4- 



seeded. Petals yellow. Lateral sepals saccate. — Species i North- 

 west Africa. (Under Rapistnim Desv.) . . . Cordylocarpus Desf. 

 Lower joint of the fruit dehiscing in two valves, as broad as the upper 

 one, rarely narrower, but then petals violet 54 



54. Seeds globular, sometimes slightly flattened. Cotyledons 2-lobed. Petals 



yellow or white, sometimes with violet veins. — Species 25, five of 

 them only cultivated or naturalized. Some species yield vegetables, 

 salad, oil, condiments, or medicaments, especially B. oleracea L., cabbage, 

 B. campesiris L., rapeseed, B. Napus L., turnip, and B. nigra Koch, 

 black mustard. (Including M elanosinapis Schimp. & Spenn.) 



Brassica L. 

 Seeds ovoid or oblong. Leaves pinnatipartite 55 



55. Fruit-valves net-veined with a strong midrib. Cotyledons truncate. 



Sepals spreading. Petals white or yellow. — Species 6. North and 

 East Africa. (Including Hirschfeldia Moench, under Brassica L.) 



Erucastrum Presl 



