1)Broccoli is a plant of the cabbage family Brassicaceae (formerly Cruciferae).
Thus it is related to Radish and Mustard and hence it is a Dicot plant .
It is classified as the Italica cultivar group of the species Brassica oleracea.
Broccoli possesses abundant arboreal, luscious, fleshy, flower heads, usually green in color, arranged in a tree-like fashion on branches sprouting from a thick, edible, sturdy, meaty stalk.
The mass of flower heads is surrounded by lavish leaves.
Broccoli most closely resembles cauliflower, which is a different cultivar group of the same species, but broccoli is green while cauliflower can appear in purple and yellow in addition to the traditional white variety.
In the United States, the term refers exclusively to the form with a single large head.
This form is sometimes called "Calabrese" in the United Kingdom, where sprouting (non-heading) types and those with underdeveloped flower buds are also sold as broccoli.
click on the link below for its picture ---
http://upload.wikimedia.org/wikipedia/commons/0/03/Broccoli_and_cross_section_edit.jpg2)Potato = It is also a dicot plant =The potato is a starchy, tuberous crop from the perennial Solanum tuberosum of the Solanaceae family.
The potato tuber that we eat for its starch is an under ground stem or branch . Very often it is thought to be a root . But it is not so .( Sweet potato , on the other hand , is a root ! )
click the links for labeled pictures =
http://www.gov.mb.ca/agriculture/crops/potatoes/images/bda04s02-f1-1-1.jpghttp://www.industryplayer.com/images/licrespic/potato_plant.jpgFor detailed information click the link below ==
http://en.wikipedia.org/wiki/Potato3 ) Celery =Apium graveolens is a plant species in the family Apiaceae commonly known as celery (var. dulce) or celeriac (var. rapaceum) depending on whether the petioles or roots are eaten. It is a dicot plant . It is closely related to coriander.
Edible part is the leaves and leaf stalks or petiole .
click the link for its picture =
http://upload.wikimedia.org/wikipedia/commons/2/23/Snijselderij_Apium_graveolens.jpghttp://upload.wikimedia.org/wikipedia/commons/c/c5/Celery_Leaf.JPGcelery as root vegetable =
http://en.wikipedia.org/wiki/CeleriacFinally , for sweet potato click on the link below ==
http://en.wikipedia.org/wiki/Sweet_potato