Plant diversity and angiosperms in india

Nepal About species of flowering plants are broadly considered as endemics and represent Besides genera are endemic to India, out of these 71 genera are endemic to the Himalaya, 60 to Peninsular India and 1 genus, i. Similarly, bamboos, which are closely associated with the social and cultural fabric of Indian masses, are also represented in India by species out of in the world, again with the maximum diversity in Northeast India.

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Dominant angiospermic families in India are: Insectivorous and Parasitic plants: Droseraceae, Nepenthaceae and Lentibulariaceae. However the parasitic plants mainly belong to Loranthaceae, Balanophoraceae, Santalaceae, Cuscutaceae, Orobanchaceae and Rafflesiaceae.

About two percent of all flowering plants are of aquatic flowering plants. The members of families Podostemaceae and Tristichaceae grow on rocks under water in fast flowing streams.

The aquatic flora play an important role as water purifier by absorbing heavy metals e. Ceratophylum ChromiumBacopa Copper and Cadmium. Limosella aquatica, Hippuris vulgaris occurs in subalpine-alpine lakes. Mangrove plants inhabit coastal regions and estuaries. They survive under marshy conditions.

Largest mangrove region is in Sunderbans is West Bengal. It has been designated as world Heritage site of which 80 percent of these are restricted to Sunderbans and Andaman and Nicobar islands. Some mangrove species are Bruguiea, Gymnorrhiza, Avicennia officinalis, Ceriops tagal, Heritiera fomes, Lumnitzera sp.

Aegialitis rotundifolia and Acanthus ilicifolius are common shrubby plants in poor saline plains.

Status of Plant Diversity in India

Nypa fruiticans and Phoenix paludosa are mangrove palms. There are certain species of angiosperms which grow on metalliferous soils and act as indicator e. Holarrhena pubescans, Impatiens balsamina, Veronica cinerea etc. Diversification of Primitive and Advanced Families: The primitive families are mostly confined to those regions which are very old in geological time scale in comparison to the newly developed areas.

India is considered as a sanctuary of primitive flowering plants. Primitive flowering plants in India: The advance families are generally present in comparatively younger areas on geological time scale. Himalayan region of India is supposed to be much younger than deccan Peninsula and North East India, as it harbours most of the advanced families.

The advanced families are confined to the areas geologically young and do not spread while the primitive families are older in age and occur in geologically older areas but spread over a larger area.

Apiaceae — 10 genera — 42 species Asteraceae — 12 genera — 92 species Fabaceae —11 genera — 17 species Lamiaceae — 11 genera — 22 species Orchidaceae — 27 genera — 83 species Poaceae — 17 genera — 40 species Rubiaceae — 19 genera — 58 species Primitive families:The present study contains the census of endemic flowering plants of Kerala state, India.

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A total of endemic taxa belong to genera of 65 families are compiled and presented. Status of Plant species (including virus, bacteria, algae, fungi and lichens) in India.

Angiosperms: There are 17, species, subspecies, varieties, 33 subvarieties and 70 forma, altogether 20, taxa of angiosperms under genera and families in India, representing approximately 7% of the described species in the world.

In India there are about 45, plant species are known that represent about 7% of the world’s flora. Nearly, species of angiosperms are endemic to India. The diversity in plant life can be understood from the following headings. According to Udvardy (), biodiversity exists on earth in 8 broad realms with bio-geographical provinces.

It has been estimated that world’s 12 countries Australia, Brazil, China, Columbia, Ecuador, India, Indonesia, Madagascar, Malaysia, Mexico, Peru and Zaire together hold 70% of .

Status of Plant species (including virus, bacteria, algae, fungi and lichens) in India. Angiosperms: There are 17, species, subspecies, varieties, 33 subvarieties and 70 forma, altogether 20, taxa of angiosperms under genera and families in India, representing approximately 7% of the described species in the world.

Plant diversity and angiosperms in india LAUNCH Angiosperms or flowering plants (also known as Angiospermae, Magnoliophyta, or Anthophyta) would be the many varied number of the place kingdom, containing around .