Fifteenth class. 
81 
. 13 
Euclidium. 72. 
. 14 
Armoracia. 61. 
Cochlearia. 59. 
. 16 
28 
— Silicule 2-celled, with 2—several seeds 
13. Silicule pubescent, 2-seeded 
— Silicule glabrous, several-seeded . 
14. Yalves nerveless . -* . 
— Valves 1-nerved ..... 
15 (3). FIs white, lilac or red 
— FIs yellow ...... 
16. Silicules indehisc. Racemes opp. the Is. Ls pinnatipartite 
Senebiera. 71. 
— Silicules dehisc. Racemes terminal . . . 17 
17. Pets unequal, the 2 outer ones distinctly larger . 18 
— Pets equal ........ If) 
18. Stas with an appendage. Stem leafless Teesdalea. 64. 
— Stas without the appendage. Stem leafy . Iberis. 65. 
19. Silicules very large (35—60 mm), stipitate, i. e. supported 
on the peduncle by another stalk. FIs lilac or purplish 
Lunaria. 55. 
— Silicules smaller (at most 15 mm), not stipitate 19 a 
19a. Pets 2-fid (white) ....... 20 
— Pets entire or only slightly indented . . . 21 
Stem leafy. Stas short, with a distinct tooth Berteroa. 53- 
Stem leafless. Stas with no tooth . Erophila. 58. 
Partition much narrower than the broadest diameter of 
the silicule ........ 22 
Partition as broad or almost as broad as the broadest 
diameter of the silicule ..... 27 
Long stas winged, toothed. FIs lilac or purple 
Aethionema. 70. 
Stas Dot toothed ....... 23 
Cells of the silicule 1-seeded . . Lepidium. 67. 
Cells of the silicule with 2—several seeds . . 24 
FIs violet ..... 
FIs white ..... 
Yalves winged, with concave wings 
Yalves not winged 
Cells of the silicule 2-seeded . . Hutchinsia. 68. 
— Cells of the silicule with numerous seeds Capsella. 69. 
27 (21). FIs rose-coloured. Ls 3-fid . . Petrocallis. 56. 
— FIs white. Ls entire ..... Draba. 57. 
28 (15). Stem leafless ...... Draba. 57. 
— Stem leafy ........ 29 
29. Partition as broad as the broad est diameter of the sili¬ 
cule. (PI. more or less gray, on account of the small 
stellate hairs) ....... 30 
— Partition much narrower than the broadest diameter of 
the silicule ........ 31 
30. Silicules 1-celled, 1-seeded, pendant . Clypeola. 54. 
20 . 
21 
22 
23. 
24. 
25. 
26. 
Thalaspi. 63. 
. 25 
Thalaspi. 63. 
. 26 
