Kingdom Plantae contains all photosynthetic eukaryotic multicellular organisms and their non-photosynthetic relatives..
The salient features of kingdom Plantae are:
(i) Organisms are multicellular except for some algae.
(ii) They are eukaryotic.
(iii) Body form is less regular and Growth is usually indefinite.
(iv) Mode of nutrition is oxygenic photosynthesis.
(v) The photosynthetic regions contain chlorophyll.
(vi) The plants are usually fixed or free-floating.
(vii) Structural differentiation into tissues is found except for certain algae.
(viii) The cells contain central vacuoles.
(ix) Food reserve is usually starch and fat.
(x) Some of the plants are heterotrophic such as insectivorous plants.
(xi) Reproduction is both asexual and sexual. Accessory spores are present in lower plants.