Rapeseed and Mustard

We generally refer to two species of Brassica as Mustard in Bhutan. Actually, mustard is Brassica juncea, whereas Brassica campestris is known as Rapeseed. There are some differences at the species level. What we commonly grow in the country is rapeseed. Rapeseed is a herbaceous annual plant. The plant is shorter in height (45-150 cm) than mustard. The roots are more or less confined to surface layers with an extensive lateral spread. The stem is usually covered with a waxy deposit. Leaves are borne sessile and are glabrous and hairy. Fruits are thicker than those of mustard and are laterally compressed, with a beak one-third to half their length. Seeds are either yellow or brown with a smooth seed coat. Mustard plants are tall (90-200 cm), erect and more branched. The plant bears normally long and tapering roots. The leaves are not dilated at the base and clasping as in the case of rape, but are stalked, broad and pinnatified. The pods are slender, strongly ascending or erect with short and stout beaks. The colour of seed is brown or dark brown.  download full details here