Brassica species ?- Ooty, Nilgiris, Tamil Nadu

Brassica species ?;
.

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Herb from Nilgiris for ID 270411MK1:  Please help to identify this herb found commonly on roadsides of Ooty, Nilgiris. Is this any Brassicaceae?

Date/Time- 18-04-2011 / 03:00 PM
Location- Place, Altitude, GPca.2100asl; Ooty, TN
Habitat- Garden/ Urban/ Wild/ Type- roadside weed
Plant Habit-erect herb
Height/Length- 25 – 30 cm long
Leaves Type/ Shape/ Size- ca.5 x 2 cm
Inflorescence Type/ Size- c. 15cm long; terminal racemes
Flowers Size/ Colour/ Calyx/ Bracts- yellow; c. 0.4 cm across

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Perhaps some more photographs should help. The leaves suggest some Sisymbrium, but vaguely seen appressed fruits suggest Brassica nigra.

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