2l6 88. CRUCIFERAE 



FAMILY 88. CRUCIFERAE 



Herbs or tindershrubs, rarely shrubs. Leaves alternate, rarely the lower 

 opposite, simple, but often divided, without stipules, but frequently with 

 auricles at the base. Flowers without bracteoles, usually in racemes, regular 

 or nearly so, hermaphrodite. Sepals 4. Petals 4, rarely o. Stamens 6, of 

 which 4 are longer, rarely 2 — 4, hypogynous, rarely subperigynous. Glands at 

 the base of the stamens more or less developed. Ovary superior, i— 2-celled or 

 transversely septate, very rarely 3-celled. Ovules parietal, curved. Style 

 simple, with i — 2 stigmas. Fruit dry, usually 2-valved. Albumen scanty or 

 wanting. Embryo curved. — Genera 88, species 420. (Plate 54.) 



1. Hairs, all or some of them, branched, at least at the base. Stigma more 



developed above the placentas than between them. [Tribe HESPERI- 



DEAE.] 2 



Hairs simple or wanting 37 



2. Fruit at least 4 times as long as broad 3 



Fruit less than 4 times as long as broad, or broader than long ... 19 



3. Fruit-valves with a horn-like appendage. Radicle of the embryo accum- 



bent 4 



Fruit-valves without an appendage, but the style sometimes appendaged. 7 



4. Fruit-valves with a basal appendage. Seeds margined. Style appendaged 



at the base. Petals violet. Lateral sepals gibbous at the base. 

 Herbs covered with glandular tubercles. — Species i. North Africa. 



Lonchophora Dur. 



Fruit-valves with an apical appendage. Seeds not margined. Petals 



white, yellow^ or red. Plants without glandular tubercles. ... 5 



5. Fruit-valves with a forked appendage. Petals pink. Leaves linear, 



entire. Undershrubs. — Species i. Canary Islands. Parolinia Webb 

 Fruit-valves with an entire appendage 6 



6. Fruit-valves with a blunt appendage below the apex. Petals red. Leaves 



oblong or ovate, sinuate or toothed. Undershrubs with star-shaped 



hairs. — Species 5. East Africa Diceratella Boiss. 



Fruit-valves with a pointed appendage at the apex. Petals white or 

 yellow. Leaves linear. Herbs with 2-cleft hairs. — Species i. North 

 Africa Notoceras R. Br. 



7. Lateral glands alone present, one on each side of the lateral stamens. 



Stigmatic lobes usually long and erect, but sometimes imited. . . 8 



Lateral and median (anterior and posterior) glands present, sometimes 



blended into a ring. Stigmatic lobes usually short and spreading or 



indistinctly developed 14 



S. Plants covered with glandular tubercles. Style with a dorsal gibbosity ; 

 stigma not sharply limited. Seeds flat ; radicle accumbcnt. — Species 

 15. North, East, and South Africa. Some are used as ornamental 



plants or in medicine. " Stock." Matthiola R. Br. 



Plants without glandular tubercles. Stigma more or less sharply limited 

 at the base 



