Barbarea vulgaris

Barbarea vulgaris R.Br., Hortus Kew. 4: 109 1812. (Syn: Arabis barbarea Bernh.; Barbarea abortiva Hausskn.; Barbarea altaica Andrz. ex Steud.; Barbarea arcuata (Opiz ex J.Presl & C.Presl) Rchb.; Barbarea arcuata Andrz. ex DC. ....; Barbarea augustana Boiss.; Barbarea balcana Pancic; Barbarea barbarea MacMill. [Invalid]; Barbarea barbarea (L.) Huth ..; Barbarea hirsuta Weihe; Barbarea iberica (Willd.) DC.; Barbarea kayseri Schur; Barbarea lepuznica Nyár.; Barbarea linnaei Spenn.; Barbarea lyrata Asch.; Barbarea macrophylla Halácsy; Barbarea pyrenaica Jord.; Barbarea rivularis Martrin-Donos; Barbarea rivularis Pancic [Illegitimate]; Barbarea rupestris Steud.; Barbarea sicula Gren. & Godr.; Barbarea stricta Willk. [Illegitimate]; Barbarea sylvestris Jord.; Barbarea taurica DC.; Barbarea vicina Martrin-Donos; Barbarea vulgaris var. arcuata (Opiz ex J.Presl & C.Presl) Fr. ...................; Campe barbarea (Garsault) W.Wight ....; Campe rivularis (Martrin-Donos) A.Heller; Campe vulgaris (R.Br.) Dulac [Illegitimate]; Cheiranthus ibericus Willd.; Cheiranthus laevigatus Willd. ex DC.; Crucifera arcuata E.H.L.Krause; Crucifera barbaraea E.H.L.Krause; Eruca barbarea Lam.; Erysimum arcuatum Opiz ex J.Presl & C.Presl; Erysimum barbarea L.; Erysimum lucidum Salisb.; Erysimum lyratum Gilib. [Invalid]; Erysimum lyrifolium Stokes; Sisymbrium barbarea Garsault [Invalid]);

Images by Gurcharan Singh (Inserted by J.M.Garg) (For more photos & complete details, click on the links)

Barbarea vulgaris Aiton from Gulmarg and Pahalgam in Kashmir: Barbaraea vulgaris Aiton, Hort. Kew. ed. 2. 4:109. 1812
Syn: Barbaraea vulgaris var. taurica Hook. f. & T. And.; Barbaraea arcuata (Opiz ex Presl) Reichenb.
Common names: Yellow rocket, wintercress, bittercress
Very easily identified from B. intermedia by uppermost cauline leaves being undivided, sessile, amplexicaule at base, irregularly toothed and slightly upcurved siliqua, and basal leaves with much larger cordate terminal lobe.  
Erect glabrous herbs up to 80 cm tall with angled branched stem; basal leaves petiolate with up to 8 cm long petiole, with large ovate to orbicular and cordate terminal lobe and 1-3 pairs of very small lateral lobes; upper cauline leaves ovate to suborbicular, amplexicaul, irregularly dentate; flowers yellow, in condensed raceme, elongating in fruit; bracts absent; pedicel up to 7 mm in fruit; sepals yellow, oblong 3-4 mm long; petals spatulate, yellow, 5-6 mm long; siliqua linear, 15-28 mm long, less than 1.5 mm broad, slightly upcurved terminating in slender 2-3 mm long style.
Photographed from Gulmarg and Pahalgam in Kashmir in May, 2012.
Most of the Brassicaceae sp. look so similar, really difficult to arrive at ID in absence of key characters. Now i understand why ... always insists for the photographs of leaves and other key characters.
Thanks for showing us so many similar looking yet altogether different plants..